/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:38:49,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:38:49,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:38:49,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:38:49,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 21:38:49,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:38:49,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:38:49,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:38:49,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:38:49,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:38:49,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:38:49,666 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:38:49,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:38:49,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:38:49,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:38:49,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:38:49,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:38:49,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:38:49,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:38:49,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:38:49,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:38:49,669 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:38:49,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:38:49,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:38:49,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:38:49,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:38:49,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:38:49,930 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:38:49,931 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:38:49,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-06-12 21:38:49,940 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-06-12 21:38:49,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:38:49,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:38:49,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:38:49,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:38:49,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:38:49,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:49,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:49,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:38:49,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:38:49,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:38:49,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:38:49,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:49,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... [2021-06-12 21:38:50,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:38:50,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:38:50,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:38:50,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:38:50,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:38:50,059 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:38:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:38:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:38:50,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:38:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:38:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:38:50,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:38:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:38:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:38:50,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:38:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:38:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:38:50,072 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:38:50,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:38:50,240 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:38:50,241 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:38:50 BoogieIcfgContainer [2021-06-12 21:38:50,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:38:50,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:38:50,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:38:50,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:38:50,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:38:49" (1/2) ... [2021-06-12 21:38:50,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2728a4 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:38:50, skipping insertion in model container [2021-06-12 21:38:50,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:38:50" (2/2) ... [2021-06-12 21:38:50,245 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-06-12 21:38:50,249 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:38:50,249 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:38:50,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:38:50,249 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:38:50,273 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:38:50,287 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:38:50,298 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:38:50,299 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:38:50,299 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:38:50,299 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:38:50,299 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:38:50,299 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:38:50,299 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:38:50,299 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:38:50,307 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-12 21:38:50,362 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:38:50,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:50,372 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:50,372 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-06-12 21:38:50,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:50,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594178710] [2021-06-12 21:38:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:50,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594178710] [2021-06-12 21:38:50,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594178710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:50,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:50,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:38:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852373289] [2021-06-12 21:38:50,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:38:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:38:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:38:50,573 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:50,609 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-12 21:38:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:38:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:38:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:50,618 INFO L225 Difference]: With dead ends: 298 [2021-06-12 21:38:50,618 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 21:38:50,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:38:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 21:38:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-12 21:38:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-12 21:38:50,664 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-12 21:38:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:50,664 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-12 21:38:50,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-12 21:38:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:50,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:50,666 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:50,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:38:50,667 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-06-12 21:38:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:50,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693214638] [2021-06-12 21:38:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:50,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693214638] [2021-06-12 21:38:50,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693214638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527203160] [2021-06-12 21:38:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:38:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527203160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 21:38:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874402763] [2021-06-12 21:38:50,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:38:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:38:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:38:50,866 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:51,216 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-06-12 21:38:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:38:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:51,225 INFO L225 Difference]: With dead ends: 1019 [2021-06-12 21:38:51,225 INFO L226 Difference]: Without dead ends: 1019 [2021-06-12 21:38:51,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:38:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-12 21:38:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-06-12 21:38:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-06-12 21:38:51,255 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-06-12 21:38:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:51,256 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-06-12 21:38:51,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-06-12 21:38:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:51,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:51,257 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:51,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 21:38:51,458 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1571767266, now seen corresponding path program 2 times [2021-06-12 21:38:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:51,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746560935] [2021-06-12 21:38:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:51,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:51,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746560935] [2021-06-12 21:38:51,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746560935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:51,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886732142] [2021-06-12 21:38:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:51,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:38:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886732142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:51,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:51,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 21:38:51,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545886480] [2021-06-12 21:38:51,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:38:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:38:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:38:51,656 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:51,933 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-06-12 21:38:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:38:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:51,937 INFO L225 Difference]: With dead ends: 1035 [2021-06-12 21:38:51,937 INFO L226 Difference]: Without dead ends: 1035 [2021-06-12 21:38:51,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:38:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-12 21:38:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-06-12 21:38:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-06-12 21:38:51,960 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-06-12 21:38:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:51,960 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-06-12 21:38:51,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-06-12 21:38:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:51,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:51,966 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:52,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:52,183 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash -120635141, now seen corresponding path program 1 times [2021-06-12 21:38:52,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257802971] [2021-06-12 21:38:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:52,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257802971] [2021-06-12 21:38:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257802971] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:52,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:52,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:38:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258072413] [2021-06-12 21:38:52,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:38:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:52,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:38:52,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:38:52,227 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:52,287 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-06-12 21:38:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:38:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:52,290 INFO L225 Difference]: With dead ends: 483 [2021-06-12 21:38:52,290 INFO L226 Difference]: Without dead ends: 477 [2021-06-12 21:38:52,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:38:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-12 21:38:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-06-12 21:38:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-06-12 21:38:52,299 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-06-12 21:38:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:52,299 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-06-12 21:38:52,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-06-12 21:38:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:52,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:52,301 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:52,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 21:38:52,301 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-06-12 21:38:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:52,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939898956] [2021-06-12 21:38:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:52,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939898956] [2021-06-12 21:38:52,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939898956] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:52,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:52,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:38:52,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918143664] [2021-06-12 21:38:52,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:38:52,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:52,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:38:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:38:52,332 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:52,397 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-06-12 21:38:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:38:52,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:52,400 INFO L225 Difference]: With dead ends: 539 [2021-06-12 21:38:52,400 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 21:38:52,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:38:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 21:38:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-06-12 21:38:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-06-12 21:38:52,409 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-06-12 21:38:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:52,409 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-06-12 21:38:52,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-06-12 21:38:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:52,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:52,410 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:52,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 21:38:52,410 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1479238087, now seen corresponding path program 2 times [2021-06-12 21:38:52,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:52,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715445730] [2021-06-12 21:38:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:52,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715445730] [2021-06-12 21:38:52,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715445730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:52,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:52,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:38:52,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292530925] [2021-06-12 21:38:52,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:38:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:38:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:38:52,445 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:52,481 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-06-12 21:38:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:38:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:52,484 INFO L225 Difference]: With dead ends: 486 [2021-06-12 21:38:52,484 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 21:38:52,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:38:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 21:38:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-06-12 21:38:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-06-12 21:38:52,492 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-06-12 21:38:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:52,492 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-06-12 21:38:52,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-06-12 21:38:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:52,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:52,493 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:52,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 21:38:52,493 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash -314434059, now seen corresponding path program 3 times [2021-06-12 21:38:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:52,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484312839] [2021-06-12 21:38:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:52,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484312839] [2021-06-12 21:38:52,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484312839] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:52,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:52,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 21:38:52,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198595364] [2021-06-12 21:38:52,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:38:52,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:38:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:38:52,522 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:52,572 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-06-12 21:38:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:38:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:52,574 INFO L225 Difference]: With dead ends: 438 [2021-06-12 21:38:52,574 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 21:38:52,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:38:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 21:38:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-06-12 21:38:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-12 21:38:52,582 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-12 21:38:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:52,582 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-12 21:38:52,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-12 21:38:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:52,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:52,583 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:52,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 21:38:52,583 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1825817224, now seen corresponding path program 3 times [2021-06-12 21:38:52,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:52,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447616701] [2021-06-12 21:38:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:52,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447616701] [2021-06-12 21:38:52,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447616701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:52,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038547993] [2021-06-12 21:38:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:52,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:38:52,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:38:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:52,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038547993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:52,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:52,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:38:52,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13524229] [2021-06-12 21:38:52,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:38:52,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:38:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:38:52,691 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:52,921 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-06-12 21:38:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:38:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:52,925 INFO L225 Difference]: With dead ends: 994 [2021-06-12 21:38:52,925 INFO L226 Difference]: Without dead ends: 994 [2021-06-12 21:38:52,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:38:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-12 21:38:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-06-12 21:38:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-12 21:38:52,935 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-12 21:38:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:52,935 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-12 21:38:52,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-12 21:38:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:52,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:52,936 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:53,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:53,159 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 156862832, now seen corresponding path program 2 times [2021-06-12 21:38:53,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:53,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200071268] [2021-06-12 21:38:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:53,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200071268] [2021-06-12 21:38:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200071268] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:53,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:53,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 21:38:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293356802] [2021-06-12 21:38:53,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:38:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:38:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:38:53,198 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:53,297 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-06-12 21:38:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:38:53,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:53,300 INFO L225 Difference]: With dead ends: 466 [2021-06-12 21:38:53,300 INFO L226 Difference]: Without dead ends: 466 [2021-06-12 21:38:53,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:38:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-12 21:38:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-06-12 21:38:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-06-12 21:38:53,306 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-06-12 21:38:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:53,306 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-06-12 21:38:53,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-06-12 21:38:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:53,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:53,307 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:53,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 21:38:53,307 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2015035522, now seen corresponding path program 4 times [2021-06-12 21:38:53,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:53,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636971501] [2021-06-12 21:38:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636971501] [2021-06-12 21:38:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636971501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:53,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:53,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 21:38:53,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416956816] [2021-06-12 21:38:53,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:38:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:38:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:38:53,329 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:53,399 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-06-12 21:38:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:38:53,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:53,401 INFO L225 Difference]: With dead ends: 541 [2021-06-12 21:38:53,401 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 21:38:53,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:38:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 21:38:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-06-12 21:38:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-06-12 21:38:53,407 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-06-12 21:38:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:53,408 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-06-12 21:38:53,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-06-12 21:38:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:53,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:53,408 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:53,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 21:38:53,409 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -625514306, now seen corresponding path program 5 times [2021-06-12 21:38:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:53,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421265364] [2021-06-12 21:38:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421265364] [2021-06-12 21:38:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421265364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471200191] [2021-06-12 21:38:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:53,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:38:53,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:53,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471200191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:53,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:53,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 21:38:53,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165671040] [2021-06-12 21:38:53,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:38:53,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:38:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:38:53,523 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:53,698 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-06-12 21:38:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:38:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:53,701 INFO L225 Difference]: With dead ends: 760 [2021-06-12 21:38:53,701 INFO L226 Difference]: Without dead ends: 760 [2021-06-12 21:38:53,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:38:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-12 21:38:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-06-12 21:38:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-06-12 21:38:53,708 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-06-12 21:38:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:53,708 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-06-12 21:38:53,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-06-12 21:38:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:38:53,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:53,709 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:53,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:53,925 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1157135164, now seen corresponding path program 6 times [2021-06-12 21:38:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:53,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832704672] [2021-06-12 21:38:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:53,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:53,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832704672] [2021-06-12 21:38:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832704672] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:38:53,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:38:53,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 21:38:53,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227443235] [2021-06-12 21:38:53,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:38:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:38:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:38:53,949 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:54,003 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-06-12 21:38:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:38:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:38:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:54,005 INFO L225 Difference]: With dead ends: 429 [2021-06-12 21:38:54,005 INFO L226 Difference]: Without dead ends: 425 [2021-06-12 21:38:54,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:38:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-12 21:38:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-06-12 21:38:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-06-12 21:38:54,026 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-06-12 21:38:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:54,026 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-06-12 21:38:54,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-06-12 21:38:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:54,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:54,027 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:54,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 21:38:54,027 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:54,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1959126516, now seen corresponding path program 1 times [2021-06-12 21:38:54,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:54,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373920559] [2021-06-12 21:38:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:54,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373920559] [2021-06-12 21:38:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373920559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678554543] [2021-06-12 21:38:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:54,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:38:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:54,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:38:54,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:54,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:54,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:54,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 21:38:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:54,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678554543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:54,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:54,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-12 21:38:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059630092] [2021-06-12 21:38:54,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:38:54,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:54,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:38:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:38:54,201 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:54,271 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-06-12 21:38:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:38:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:54,274 INFO L225 Difference]: With dead ends: 552 [2021-06-12 21:38:54,274 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 21:38:54,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:38:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 21:38:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-06-12 21:38:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-06-12 21:38:54,280 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-06-12 21:38:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:54,280 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-06-12 21:38:54,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-06-12 21:38:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:54,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:54,281 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:54,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 21:38:54,499 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-06-12 21:38:54,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:54,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540039100] [2021-06-12 21:38:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:54,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540039100] [2021-06-12 21:38:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540039100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349346330] [2021-06-12 21:38:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:38:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:54,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:38:54,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:38:54,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:54,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:54,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:54,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-12 21:38:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:54,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349346330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:54,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:54,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-12 21:38:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960549841] [2021-06-12 21:38:54,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:38:54,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:38:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:38:54,852 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:55,180 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-06-12 21:38:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:38:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:55,183 INFO L225 Difference]: With dead ends: 586 [2021-06-12 21:38:55,183 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 21:38:55,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:38:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 21:38:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-06-12 21:38:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-06-12 21:38:55,190 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-06-12 21:38:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:55,190 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-06-12 21:38:55,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-06-12 21:38:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:55,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:55,191 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:55,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:55,405 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 602801515, now seen corresponding path program 2 times [2021-06-12 21:38:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:55,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753615705] [2021-06-12 21:38:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:55,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753615705] [2021-06-12 21:38:55,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753615705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648914349] [2021-06-12 21:38:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:55,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:55,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:38:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:55,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:55,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 21:38:55,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:38:55,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:55,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:55,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-12 21:38:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:55,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648914349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:55,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:55,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-12 21:38:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100901113] [2021-06-12 21:38:55,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:38:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:38:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:38:55,721 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:56,089 INFO L93 Difference]: Finished difference Result 795 states and 2267 transitions. [2021-06-12 21:38:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:38:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:56,091 INFO L225 Difference]: With dead ends: 795 [2021-06-12 21:38:56,091 INFO L226 Difference]: Without dead ends: 780 [2021-06-12 21:38:56,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:38:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-12 21:38:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 439. [2021-06-12 21:38:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-06-12 21:38:56,099 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-06-12 21:38:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:56,099 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-06-12 21:38:56,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-06-12 21:38:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:56,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:56,100 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:56,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:38:56,317 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1941464708, now seen corresponding path program 2 times [2021-06-12 21:38:56,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:56,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641265429] [2021-06-12 21:38:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:56,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:56,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641265429] [2021-06-12 21:38:56,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641265429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:56,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630800213] [2021-06-12 21:38:56,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:56,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:38:56,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:56,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:38:56,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:56,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:56,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:56,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 21:38:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:56,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630800213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:56,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:56,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 21:38:56,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882740931] [2021-06-12 21:38:56,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:38:56,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:38:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:38:56,492 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:56,556 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-06-12 21:38:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:38:56,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:56,558 INFO L225 Difference]: With dead ends: 645 [2021-06-12 21:38:56,558 INFO L226 Difference]: Without dead ends: 630 [2021-06-12 21:38:56,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:38:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-12 21:38:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-06-12 21:38:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-06-12 21:38:56,566 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-06-12 21:38:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:56,566 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-06-12 21:38:56,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-06-12 21:38:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:56,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:56,567 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:56,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 21:38:56,783 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash -745990585, now seen corresponding path program 3 times [2021-06-12 21:38:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:56,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110913707] [2021-06-12 21:38:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:56,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:56,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110913707] [2021-06-12 21:38:56,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110913707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:56,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300144488] [2021-06-12 21:38:56,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:56,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:38:56,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:56,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:38:56,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:38:57,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:57,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:57,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:57,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-12 21:38:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300144488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-06-12 21:38:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282769422] [2021-06-12 21:38:57,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:38:57,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:38:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:38:57,044 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:57,221 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-06-12 21:38:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:38:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:57,223 INFO L225 Difference]: With dead ends: 592 [2021-06-12 21:38:57,223 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 21:38:57,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:38:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 21:38:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-06-12 21:38:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-06-12 21:38:57,234 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-06-12 21:38:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:57,234 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-06-12 21:38:57,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-06-12 21:38:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:57,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:57,236 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:57,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 21:38:57,457 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-06-12 21:38:57,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:57,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953168538] [2021-06-12 21:38:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953168538] [2021-06-12 21:38:57,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953168538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:57,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327423938] [2021-06-12 21:38:57,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:57,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:38:57,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:38:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:38:57,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:57,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:57,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:57,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-12 21:38:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327423938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:57,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:57,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:38:57,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849971111] [2021-06-12 21:38:57,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:38:57,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:38:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:38:57,678 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:57,881 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-06-12 21:38:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:38:57,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:57,883 INFO L225 Difference]: With dead ends: 683 [2021-06-12 21:38:57,883 INFO L226 Difference]: Without dead ends: 668 [2021-06-12 21:38:57,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:38:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-12 21:38:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-06-12 21:38:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-06-12 21:38:57,890 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-06-12 21:38:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:57,891 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-06-12 21:38:57,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-06-12 21:38:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:38:57,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:57,891 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:58,105 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-06-12 21:38:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591433550] [2021-06-12 21:38:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:58,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:58,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591433550] [2021-06-12 21:38:58,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591433550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:58,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948558777] [2021-06-12 21:38:58,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:58,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:58,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:38:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:58,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:58,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 21:38:58,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:38:58,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:58,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:58,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:28 [2021-06-12 21:38:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948558777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:58,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:58,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 21:38:58,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534124965] [2021-06-12 21:38:58,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:38:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:38:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:38:58,446 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:58,764 INFO L93 Difference]: Finished difference Result 759 states and 2222 transitions. [2021-06-12 21:38:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:38:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:38:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:58,767 INFO L225 Difference]: With dead ends: 759 [2021-06-12 21:38:58,767 INFO L226 Difference]: Without dead ends: 744 [2021-06-12 21:38:58,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:38:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-12 21:38:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 471. [2021-06-12 21:38:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-06-12 21:38:58,776 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-06-12 21:38:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:58,776 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-06-12 21:38:58,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-06-12 21:38:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:38:58,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:58,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:58,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:58,993 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 606500413, now seen corresponding path program 3 times [2021-06-12 21:38:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:58,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85973337] [2021-06-12 21:38:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:59,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:59,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85973337] [2021-06-12 21:38:59,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85973337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:59,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329049427] [2021-06-12 21:38:59,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:59,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:38:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:38:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:38:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329049427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:59,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:59,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:38:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342554227] [2021-06-12 21:38:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:38:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:38:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:38:59,123 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:59,763 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-06-12 21:38:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:38:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:38:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:59,770 INFO L225 Difference]: With dead ends: 2301 [2021-06-12 21:38:59,770 INFO L226 Difference]: Without dead ends: 2301 [2021-06-12 21:38:59,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:38:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-12 21:38:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-06-12 21:38:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-06-12 21:38:59,787 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-06-12 21:38:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:59,787 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-06-12 21:38:59,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-06-12 21:38:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:38:59,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:59,788 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:59,993 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 412599745, now seen corresponding path program 4 times [2021-06-12 21:38:59,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:59,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248602249] [2021-06-12 21:38:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:00,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:00,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248602249] [2021-06-12 21:39:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248602249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955493373] [2021-06-12 21:39:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:00,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:00,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955493373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:00,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:00,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:39:00,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937272599] [2021-06-12 21:39:00,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:00,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:00,139 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:00,703 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-06-12 21:39:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:39:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:00,710 INFO L225 Difference]: With dead ends: 2258 [2021-06-12 21:39:00,710 INFO L226 Difference]: Without dead ends: 2258 [2021-06-12 21:39:00,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:39:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-12 21:39:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-06-12 21:39:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-06-12 21:39:00,727 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-06-12 21:39:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:00,727 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-06-12 21:39:00,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-06-12 21:39:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:00,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:00,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:00,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 21:39:00,941 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1028264061, now seen corresponding path program 5 times [2021-06-12 21:39:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:00,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473682387] [2021-06-12 21:39:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:00,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473682387] [2021-06-12 21:39:00,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473682387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:00,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111496685] [2021-06-12 21:39:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:01,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:01,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:01,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111496685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:01,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:01,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:39:01,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669532995] [2021-06-12 21:39:01,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:01,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:01,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:01,082 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:01,412 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-06-12 21:39:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:39:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:01,415 INFO L225 Difference]: With dead ends: 1609 [2021-06-12 21:39:01,415 INFO L226 Difference]: Without dead ends: 1609 [2021-06-12 21:39:01,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:39:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-12 21:39:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-06-12 21:39:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-06-12 21:39:01,427 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-06-12 21:39:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:01,427 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-06-12 21:39:01,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-06-12 21:39:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:01,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:01,428 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:01,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:01,641 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-06-12 21:39:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54568715] [2021-06-12 21:39:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:01,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54568715] [2021-06-12 21:39:01,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54568715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032727159] [2021-06-12 21:39:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:01,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:39:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032727159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:01,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:39:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279972824] [2021-06-12 21:39:01,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:01,798 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:02,152 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-06-12 21:39:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:39:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:02,155 INFO L225 Difference]: With dead ends: 1639 [2021-06-12 21:39:02,155 INFO L226 Difference]: Without dead ends: 1639 [2021-06-12 21:39:02,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:39:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-12 21:39:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-06-12 21:39:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-06-12 21:39:02,166 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-06-12 21:39:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:02,167 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-06-12 21:39:02,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-06-12 21:39:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:02,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:02,168 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:02,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 21:39:02,381 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -535240646, now seen corresponding path program 6 times [2021-06-12 21:39:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:02,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776631590] [2021-06-12 21:39:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:02,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:02,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776631590] [2021-06-12 21:39:02,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776631590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:02,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412575510] [2021-06-12 21:39:02,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:02,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:39:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:02,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412575510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:02,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:02,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:39:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926886508] [2021-06-12 21:39:02,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:39:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:02,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:39:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:39:02,499 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:02,608 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-06-12 21:39:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:39:02,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:02,610 INFO L225 Difference]: With dead ends: 1374 [2021-06-12 21:39:02,611 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 21:39:02,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:39:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 21:39:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-06-12 21:39:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-06-12 21:39:02,624 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-06-12 21:39:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:02,624 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-06-12 21:39:02,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-06-12 21:39:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:02,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:02,626 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:02,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 21:39:02,837 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-06-12 21:39:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:02,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499976000] [2021-06-12 21:39:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:02,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499976000] [2021-06-12 21:39:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499976000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036800342] [2021-06-12 21:39:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:02,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:02,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036800342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:02,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:02,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 21:39:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590998210] [2021-06-12 21:39:02,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:02,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:02,960 INFO L87 Difference]: Start difference. First operand 911 states and 2910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:03,178 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-06-12 21:39:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:39:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:03,181 INFO L225 Difference]: With dead ends: 1491 [2021-06-12 21:39:03,181 INFO L226 Difference]: Without dead ends: 1465 [2021-06-12 21:39:03,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-12 21:39:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-06-12 21:39:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-06-12 21:39:03,196 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-06-12 21:39:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:03,196 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-06-12 21:39:03,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-06-12 21:39:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:03,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:03,198 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:03,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 21:39:03,413 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 7 times [2021-06-12 21:39:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:03,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269302885] [2021-06-12 21:39:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:03,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269302885] [2021-06-12 21:39:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269302885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897826918] [2021-06-12 21:39:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:03,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897826918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:03,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:03,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:39:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975643922] [2021-06-12 21:39:03,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:03,551 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:03,714 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-06-12 21:39:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:39:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:03,716 INFO L225 Difference]: With dead ends: 1664 [2021-06-12 21:39:03,717 INFO L226 Difference]: Without dead ends: 1632 [2021-06-12 21:39:03,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:39:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-12 21:39:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-06-12 21:39:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-06-12 21:39:03,734 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-06-12 21:39:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:03,734 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-06-12 21:39:03,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-06-12 21:39:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:03,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:03,736 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:03,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 21:39:03,952 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash -337091691, now seen corresponding path program 2 times [2021-06-12 21:39:03,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:03,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174064774] [2021-06-12 21:39:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:03,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174064774] [2021-06-12 21:39:03,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174064774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902489398] [2021-06-12 21:39:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:04,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902489398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:04,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:04,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 21:39:04,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614288381] [2021-06-12 21:39:04,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:04,065 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:04,298 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-06-12 21:39:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:39:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:04,302 INFO L225 Difference]: With dead ends: 1812 [2021-06-12 21:39:04,302 INFO L226 Difference]: Without dead ends: 1790 [2021-06-12 21:39:04,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-12 21:39:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-06-12 21:39:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-06-12 21:39:04,320 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-06-12 21:39:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:04,320 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-06-12 21:39:04,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-06-12 21:39:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:04,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:04,321 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:04,537 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 3 times [2021-06-12 21:39:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955517477] [2021-06-12 21:39:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:04,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955517477] [2021-06-12 21:39:04,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955517477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181139017] [2021-06-12 21:39:04,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:04,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:39:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181139017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:39:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958701194] [2021-06-12 21:39:04,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:04,658 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:04,846 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-06-12 21:39:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:39:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:04,863 INFO L225 Difference]: With dead ends: 2086 [2021-06-12 21:39:04,863 INFO L226 Difference]: Without dead ends: 2060 [2021-06-12 21:39:04,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:39:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-06-12 21:39:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-06-12 21:39:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-06-12 21:39:04,883 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-06-12 21:39:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:04,883 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-06-12 21:39:04,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-06-12 21:39:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:04,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:04,885 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:05,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 21:39:05,101 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2074608542, now seen corresponding path program 7 times [2021-06-12 21:39:05,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:05,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125053538] [2021-06-12 21:39:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:05,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125053538] [2021-06-12 21:39:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125053538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412904571] [2021-06-12 21:39:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:05,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412904571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:05,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:05,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 21:39:05,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32820794] [2021-06-12 21:39:05,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:39:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:39:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:39:05,206 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:05,348 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-06-12 21:39:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:05,350 INFO L225 Difference]: With dead ends: 1777 [2021-06-12 21:39:05,350 INFO L226 Difference]: Without dead ends: 1777 [2021-06-12 21:39:05,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-12 21:39:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-06-12 21:39:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-06-12 21:39:05,382 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-06-12 21:39:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:05,383 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-06-12 21:39:05,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-06-12 21:39:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:05,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:05,384 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:05,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 21:39:05,600 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1728029405, now seen corresponding path program 8 times [2021-06-12 21:39:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:05,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045693686] [2021-06-12 21:39:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045693686] [2021-06-12 21:39:05,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045693686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55270278] [2021-06-12 21:39:05,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:05,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:05,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55270278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:05,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:05,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:39:05,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175541113] [2021-06-12 21:39:05,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:05,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:05,710 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:06,171 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-06-12 21:39:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:39:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:06,177 INFO L225 Difference]: With dead ends: 4076 [2021-06-12 21:39:06,177 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 21:39:06,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:39:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 21:39:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-06-12 21:39:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-06-12 21:39:06,212 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-06-12 21:39:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:06,212 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-06-12 21:39:06,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-06-12 21:39:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:06,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:06,214 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:06,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:06,427 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash -584257835, now seen corresponding path program 4 times [2021-06-12 21:39:06,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:06,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992846408] [2021-06-12 21:39:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:06,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:06,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992846408] [2021-06-12 21:39:06,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992846408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:06,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932444229] [2021-06-12 21:39:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:06,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:06,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:06,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932444229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:06,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:06,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:39:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225193159] [2021-06-12 21:39:06,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:06,559 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:06,760 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-06-12 21:39:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:39:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:06,763 INFO L225 Difference]: With dead ends: 2048 [2021-06-12 21:39:06,763 INFO L226 Difference]: Without dead ends: 2048 [2021-06-12 21:39:06,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:39:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-06-12 21:39:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-06-12 21:39:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-06-12 21:39:06,781 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-06-12 21:39:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:06,781 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-06-12 21:39:06,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-06-12 21:39:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:06,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:06,783 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:06,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:39:06,997 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1538811107, now seen corresponding path program 9 times [2021-06-12 21:39:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:06,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135397686] [2021-06-12 21:39:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:07,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135397686] [2021-06-12 21:39:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135397686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:07,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082581450] [2021-06-12 21:39:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:07,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:39:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:07,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:07,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082581450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:07,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:07,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:39:07,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373304394] [2021-06-12 21:39:07,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:07,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:07,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:07,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:07,121 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:07,593 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-06-12 21:39:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:39:07,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:07,598 INFO L225 Difference]: With dead ends: 3885 [2021-06-12 21:39:07,598 INFO L226 Difference]: Without dead ends: 3877 [2021-06-12 21:39:07,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:39:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-06-12 21:39:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-06-12 21:39:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-06-12 21:39:07,624 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-06-12 21:39:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-06-12 21:39:07,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-06-12 21:39:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:07,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:07,626 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:07,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:07,827 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1366634973, now seen corresponding path program 10 times [2021-06-12 21:39:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:07,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750580388] [2021-06-12 21:39:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:07,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750580388] [2021-06-12 21:39:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750580388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190321234] [2021-06-12 21:39:07,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:07,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:07,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190321234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:07,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:07,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:07,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571337592] [2021-06-12 21:39:07,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:07,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:07,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:07,960 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:08,540 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-06-12 21:39:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:39:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:08,558 INFO L225 Difference]: With dead ends: 3967 [2021-06-12 21:39:08,558 INFO L226 Difference]: Without dead ends: 3967 [2021-06-12 21:39:08,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:39:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-06-12 21:39:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-06-12 21:39:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-06-12 21:39:08,586 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-06-12 21:39:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:08,586 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-06-12 21:39:08,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-06-12 21:39:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:08,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:08,588 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:08,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:39:08,792 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 416014497, now seen corresponding path program 11 times [2021-06-12 21:39:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:08,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611524546] [2021-06-12 21:39:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:08,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611524546] [2021-06-12 21:39:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611524546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455469221] [2021-06-12 21:39:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:08,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:39:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:08,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:08,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455469221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:08,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:08,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:08,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447942465] [2021-06-12 21:39:08,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:08,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:08,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:08,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:08,905 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:09,444 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-06-12 21:39:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:39:09,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:09,449 INFO L225 Difference]: With dead ends: 3712 [2021-06-12 21:39:09,450 INFO L226 Difference]: Without dead ends: 3704 [2021-06-12 21:39:09,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:39:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-12 21:39:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-06-12 21:39:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-06-12 21:39:09,487 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-06-12 21:39:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:09,487 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-06-12 21:39:09,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-06-12 21:39:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:09,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:09,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:09,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 21:39:09,701 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1631157469, now seen corresponding path program 12 times [2021-06-12 21:39:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:09,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393065189] [2021-06-12 21:39:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:09,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:09,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393065189] [2021-06-12 21:39:09,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393065189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:09,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535345361] [2021-06-12 21:39:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:09,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 21:39:09,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:09,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:09,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535345361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:09,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:09,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:39:09,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863643504] [2021-06-12 21:39:09,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:09,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:09,818 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:10,130 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-06-12 21:39:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:39:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:10,134 INFO L225 Difference]: With dead ends: 3014 [2021-06-12 21:39:10,134 INFO L226 Difference]: Without dead ends: 3014 [2021-06-12 21:39:10,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:39:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-06-12 21:39:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-06-12 21:39:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-06-12 21:39:10,157 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-06-12 21:39:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:10,157 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-06-12 21:39:10,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-06-12 21:39:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:10,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:10,159 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 21:39:10,360 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 8 times [2021-06-12 21:39:10,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:10,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901279761] [2021-06-12 21:39:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:10,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901279761] [2021-06-12 21:39:10,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901279761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213195944] [2021-06-12 21:39:10,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:10,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:10,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213195944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:10,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:10,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:10,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275135361] [2021-06-12 21:39:10,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:10,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:10,479 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:10,767 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-06-12 21:39:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:39:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:10,771 INFO L225 Difference]: With dead ends: 3028 [2021-06-12 21:39:10,771 INFO L226 Difference]: Without dead ends: 3028 [2021-06-12 21:39:10,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:39:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-06-12 21:39:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-06-12 21:39:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-06-12 21:39:10,795 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-06-12 21:39:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:10,795 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-06-12 21:39:10,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-06-12 21:39:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:10,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:10,797 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 21:39:11,009 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 9 times [2021-06-12 21:39:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960805731] [2021-06-12 21:39:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:11,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960805731] [2021-06-12 21:39:11,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960805731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465118695] [2021-06-12 21:39:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:11,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:39:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:11,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465118695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:11,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:11,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:11,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579189490] [2021-06-12 21:39:11,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:11,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:11,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:11,129 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:11,531 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-06-12 21:39:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:39:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:11,535 INFO L225 Difference]: With dead ends: 3515 [2021-06-12 21:39:11,535 INFO L226 Difference]: Without dead ends: 3515 [2021-06-12 21:39:11,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:39:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-12 21:39:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-06-12 21:39:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-06-12 21:39:11,571 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-06-12 21:39:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:11,571 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-06-12 21:39:11,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-06-12 21:39:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:11,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:11,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:11,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 21:39:11,793 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 10 times [2021-06-12 21:39:11,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:11,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983348644] [2021-06-12 21:39:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:11,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983348644] [2021-06-12 21:39:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983348644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887615476] [2021-06-12 21:39:11,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:11,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887615476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:11,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:11,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:39:11,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209833772] [2021-06-12 21:39:11,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:11,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:11,916 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:12,178 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-06-12 21:39:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:39:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:12,183 INFO L225 Difference]: With dead ends: 3812 [2021-06-12 21:39:12,183 INFO L226 Difference]: Without dead ends: 3805 [2021-06-12 21:39:12,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:39:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-12 21:39:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-06-12 21:39:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-06-12 21:39:12,216 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-06-12 21:39:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:12,216 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-06-12 21:39:12,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-06-12 21:39:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:12,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:12,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:12,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:12,419 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 11 times [2021-06-12 21:39:12,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:12,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44459764] [2021-06-12 21:39:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:12,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44459764] [2021-06-12 21:39:12,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44459764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387773609] [2021-06-12 21:39:12,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:12,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:12,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387773609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:12,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:12,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:39:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004807011] [2021-06-12 21:39:12,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:12,545 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:12,812 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-06-12 21:39:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:39:12,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:12,817 INFO L225 Difference]: With dead ends: 3889 [2021-06-12 21:39:12,817 INFO L226 Difference]: Without dead ends: 3889 [2021-06-12 21:39:12,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:39:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-12 21:39:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-06-12 21:39:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-06-12 21:39:12,850 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-06-12 21:39:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:12,850 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-06-12 21:39:12,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-06-12 21:39:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:12,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:12,853 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:13,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:13,053 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 12 times [2021-06-12 21:39:13,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:13,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551227209] [2021-06-12 21:39:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551227209] [2021-06-12 21:39:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551227209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399235358] [2021-06-12 21:39:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:13,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:39:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:13,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399235358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:13,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:13,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:13,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716915379] [2021-06-12 21:39:13,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:13,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:13,156 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:13,532 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-06-12 21:39:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:39:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:13,536 INFO L225 Difference]: With dead ends: 3915 [2021-06-12 21:39:13,536 INFO L226 Difference]: Without dead ends: 3911 [2021-06-12 21:39:13,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:39:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-12 21:39:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-06-12 21:39:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-06-12 21:39:13,579 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-06-12 21:39:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:13,579 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-06-12 21:39:13,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-06-12 21:39:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:13,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:13,582 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:13,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 21:39:13,792 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:13,792 INFO L82 PathProgramCache]: Analyzing trace with hash 741045571, now seen corresponding path program 5 times [2021-06-12 21:39:13,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:13,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756787297] [2021-06-12 21:39:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:13,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:13,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756787297] [2021-06-12 21:39:13,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756787297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:13,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185328170] [2021-06-12 21:39:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:13,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:13,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:13,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185328170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:13,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:13,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 21:39:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751625286] [2021-06-12 21:39:13,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:13,897 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:14,164 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-06-12 21:39:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:39:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:14,168 INFO L225 Difference]: With dead ends: 3295 [2021-06-12 21:39:14,168 INFO L226 Difference]: Without dead ends: 3280 [2021-06-12 21:39:14,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:39:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-12 21:39:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-06-12 21:39:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-06-12 21:39:14,197 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-06-12 21:39:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:14,197 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-06-12 21:39:14,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-06-12 21:39:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:14,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:14,200 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:14,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:14,400 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 989889791, now seen corresponding path program 6 times [2021-06-12 21:39:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:14,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232352120] [2021-06-12 21:39:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:14,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232352120] [2021-06-12 21:39:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232352120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601672298] [2021-06-12 21:39:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:14,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 21:39:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:14,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601672298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:14,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:14,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 21:39:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713240351] [2021-06-12 21:39:14,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:14,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:14,503 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:14,780 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-06-12 21:39:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:39:14,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:14,788 INFO L225 Difference]: With dead ends: 3360 [2021-06-12 21:39:14,788 INFO L226 Difference]: Without dead ends: 3360 [2021-06-12 21:39:14,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:39:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-06-12 21:39:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-06-12 21:39:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-06-12 21:39:14,818 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-06-12 21:39:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:14,818 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-06-12 21:39:14,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-06-12 21:39:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:14,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:14,821 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:15,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 21:39:15,021 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 13 times [2021-06-12 21:39:15,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:15,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403979955] [2021-06-12 21:39:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:15,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403979955] [2021-06-12 21:39:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403979955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663675567] [2021-06-12 21:39:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:15,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663675567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:15,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:15,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:39:15,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816964873] [2021-06-12 21:39:15,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:15,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:15,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:15,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:15,141 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:15,856 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-06-12 21:39:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:39:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:15,864 INFO L225 Difference]: With dead ends: 6236 [2021-06-12 21:39:15,864 INFO L226 Difference]: Without dead ends: 6236 [2021-06-12 21:39:15,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:39:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-12 21:39:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-06-12 21:39:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-06-12 21:39:15,909 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-06-12 21:39:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:15,909 INFO L482 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-06-12 21:39:15,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-06-12 21:39:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:15,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:15,912 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:16,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:16,112 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 14 times [2021-06-12 21:39:16,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:16,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271273277] [2021-06-12 21:39:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:16,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271273277] [2021-06-12 21:39:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271273277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133307887] [2021-06-12 21:39:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:39:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133307887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:16,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:16,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:39:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276028448] [2021-06-12 21:39:16,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:16,248 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:16,993 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-06-12 21:39:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:39:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:17,001 INFO L225 Difference]: With dead ends: 6112 [2021-06-12 21:39:17,001 INFO L226 Difference]: Without dead ends: 6112 [2021-06-12 21:39:17,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:39:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-12 21:39:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-06-12 21:39:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-06-12 21:39:17,043 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-06-12 21:39:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:17,043 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-06-12 21:39:17,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-06-12 21:39:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:17,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:17,046 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:17,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 21:39:17,246 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 7 times [2021-06-12 21:39:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:17,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539086891] [2021-06-12 21:39:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:17,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539086891] [2021-06-12 21:39:17,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539086891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531792869] [2021-06-12 21:39:17,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:17,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531792869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:17,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:17,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:39:17,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807145543] [2021-06-12 21:39:17,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:17,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:17,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:17,340 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:17,528 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-06-12 21:39:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:17,532 INFO L225 Difference]: With dead ends: 3444 [2021-06-12 21:39:17,532 INFO L226 Difference]: Without dead ends: 3418 [2021-06-12 21:39:17,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-12 21:39:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-06-12 21:39:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-06-12 21:39:17,565 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-06-12 21:39:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:17,565 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-06-12 21:39:17,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-06-12 21:39:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:17,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:17,568 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:17,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:39:17,769 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1360327411, now seen corresponding path program 8 times [2021-06-12 21:39:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:17,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991749249] [2021-06-12 21:39:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:17,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:17,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991749249] [2021-06-12 21:39:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991749249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:17,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471436548] [2021-06-12 21:39:17,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:17,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471436548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:39:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330764537] [2021-06-12 21:39:17,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:17,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:17,876 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:18,024 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-06-12 21:39:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:18,028 INFO L225 Difference]: With dead ends: 3554 [2021-06-12 21:39:18,028 INFO L226 Difference]: Without dead ends: 3554 [2021-06-12 21:39:18,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-06-12 21:39:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-06-12 21:39:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-06-12 21:39:18,073 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-06-12 21:39:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:18,073 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-06-12 21:39:18,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-06-12 21:39:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:18,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:18,077 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:18,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 21:39:18,293 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -260473223, now seen corresponding path program 13 times [2021-06-12 21:39:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:18,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299536258] [2021-06-12 21:39:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:18,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299536258] [2021-06-12 21:39:18,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299536258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700417391] [2021-06-12 21:39:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:18,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700417391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:18,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:18,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114232988] [2021-06-12 21:39:18,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:18,422 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:18,962 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-06-12 21:39:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:39:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:18,972 INFO L225 Difference]: With dead ends: 8012 [2021-06-12 21:39:18,972 INFO L226 Difference]: Without dead ends: 8012 [2021-06-12 21:39:18,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:39:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-12 21:39:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-06-12 21:39:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-06-12 21:39:19,039 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-06-12 21:39:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:19,039 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-06-12 21:39:19,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-06-12 21:39:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:19,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:19,044 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:19,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:39:19,260 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash -454373891, now seen corresponding path program 14 times [2021-06-12 21:39:19,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:19,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133518965] [2021-06-12 21:39:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:19,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133518965] [2021-06-12 21:39:19,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133518965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504997662] [2021-06-12 21:39:19,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:19,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504997662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:19,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:19,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483935440] [2021-06-12 21:39:19,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:19,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:19,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:19,374 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:19,887 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-06-12 21:39:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:39:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:19,898 INFO L225 Difference]: With dead ends: 7985 [2021-06-12 21:39:19,898 INFO L226 Difference]: Without dead ends: 7985 [2021-06-12 21:39:19,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:39:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-06-12 21:39:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-06-12 21:39:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-06-12 21:39:19,976 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-06-12 21:39:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:19,976 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-06-12 21:39:19,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-06-12 21:39:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:19,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:19,981 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:20,197 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1213889404, now seen corresponding path program 15 times [2021-06-12 21:39:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:20,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936326164] [2021-06-12 21:39:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:20,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936326164] [2021-06-12 21:39:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936326164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252034597] [2021-06-12 21:39:20,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:39:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:20,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252034597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:20,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:20,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 21:39:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939933740] [2021-06-12 21:39:20,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:39:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:39:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:39:20,287 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:20,437 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-06-12 21:39:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:20,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:20,444 INFO L225 Difference]: With dead ends: 5144 [2021-06-12 21:39:20,444 INFO L226 Difference]: Without dead ends: 5133 [2021-06-12 21:39:20,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-06-12 21:39:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-06-12 21:39:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-06-12 21:39:20,495 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-06-12 21:39:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:20,495 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-06-12 21:39:20,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-06-12 21:39:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:20,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:20,500 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:20,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:20,710 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -479704520, now seen corresponding path program 16 times [2021-06-12 21:39:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:20,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156222540] [2021-06-12 21:39:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:20,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:20,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156222540] [2021-06-12 21:39:20,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156222540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:20,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287076268] [2021-06-12 21:39:20,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:20,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:20,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287076268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:20,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:20,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 21:39:20,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85538027] [2021-06-12 21:39:20,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:39:20,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:20,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:39:20,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:39:20,799 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:20,968 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-06-12 21:39:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:39:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:20,976 INFO L225 Difference]: With dead ends: 5400 [2021-06-12 21:39:20,976 INFO L226 Difference]: Without dead ends: 5400 [2021-06-12 21:39:20,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:39:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-12 21:39:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-06-12 21:39:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-06-12 21:39:21,040 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-06-12 21:39:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:21,040 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-06-12 21:39:21,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-06-12 21:39:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:21,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:21,045 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:21,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:21,262 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -826283657, now seen corresponding path program 17 times [2021-06-12 21:39:21,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:21,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370703498] [2021-06-12 21:39:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:21,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370703498] [2021-06-12 21:39:21,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370703498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038644543] [2021-06-12 21:39:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:21,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:39:21,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:21,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038644543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:21,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:21,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:39:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013412996] [2021-06-12 21:39:21,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:21,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:21,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:21,377 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:21,814 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-06-12 21:39:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:39:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:21,824 INFO L225 Difference]: With dead ends: 7362 [2021-06-12 21:39:21,824 INFO L226 Difference]: Without dead ends: 7362 [2021-06-12 21:39:21,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:39:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-06-12 21:39:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-06-12 21:39:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-06-12 21:39:21,885 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-06-12 21:39:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:21,885 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-06-12 21:39:21,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-06-12 21:39:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:21,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:21,889 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:22,100 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1015501955, now seen corresponding path program 18 times [2021-06-12 21:39:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:22,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004075912] [2021-06-12 21:39:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:22,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004075912] [2021-06-12 21:39:22,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004075912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722771551] [2021-06-12 21:39:22,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:39:22,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:39:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:22,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722771551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:22,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:22,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 21:39:22,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12226116] [2021-06-12 21:39:22,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:22,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:22,204 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:22,624 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-06-12 21:39:22,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:39:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:22,633 INFO L225 Difference]: With dead ends: 7148 [2021-06-12 21:39:22,633 INFO L226 Difference]: Without dead ends: 7140 [2021-06-12 21:39:22,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:39:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-12 21:39:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-06-12 21:39:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-12 21:39:22,693 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-12 21:39:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:22,693 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-12 21:39:22,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-12 21:39:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:22,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:22,697 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:22,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 21:39:22,897 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 374019261, now seen corresponding path program 19 times [2021-06-12 21:39:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:22,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59452411] [2021-06-12 21:39:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:22,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59452411] [2021-06-12 21:39:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59452411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803468669] [2021-06-12 21:39:22,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:22,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:22,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803468669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:23,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116817546] [2021-06-12 21:39:23,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:23,024 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:23,524 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-06-12 21:39:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:39:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:23,533 INFO L225 Difference]: With dead ends: 7312 [2021-06-12 21:39:23,533 INFO L226 Difference]: Without dead ends: 7312 [2021-06-12 21:39:23,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:39:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-12 21:39:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-06-12 21:39:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-06-12 21:39:23,596 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-06-12 21:39:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:23,596 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-06-12 21:39:23,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-06-12 21:39:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:23,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:23,600 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:23,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:39:23,802 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2138298565, now seen corresponding path program 20 times [2021-06-12 21:39:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:23,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915984257] [2021-06-12 21:39:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:23,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915984257] [2021-06-12 21:39:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915984257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130088767] [2021-06-12 21:39:23,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:23,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:23,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:23,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130088767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:23,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:23,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-12 21:39:23,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818450556] [2021-06-12 21:39:23,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:23,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:23,924 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:24,331 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-06-12 21:39:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:39:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:24,340 INFO L225 Difference]: With dead ends: 7159 [2021-06-12 21:39:24,341 INFO L226 Difference]: Without dead ends: 7151 [2021-06-12 21:39:24,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:39:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-12 21:39:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-06-12 21:39:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-12 21:39:24,400 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-12 21:39:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:24,400 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-12 21:39:24,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-12 21:39:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:24,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:24,404 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:24,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 21:39:24,605 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:24,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1533405914, now seen corresponding path program 21 times [2021-06-12 21:39:24,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:24,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933436396] [2021-06-12 21:39:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:24,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933436396] [2021-06-12 21:39:24,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933436396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537578838] [2021-06-12 21:39:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:24,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:39:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537578838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:24,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:24,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:39:24,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358715468] [2021-06-12 21:39:24,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:39:24,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:39:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:39:24,718 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:24,859 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-06-12 21:39:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:39:24,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:24,865 INFO L225 Difference]: With dead ends: 5123 [2021-06-12 21:39:24,865 INFO L226 Difference]: Without dead ends: 5123 [2021-06-12 21:39:24,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-06-12 21:39:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-06-12 21:39:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-06-12 21:39:24,915 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-06-12 21:39:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:24,915 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-06-12 21:39:24,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-06-12 21:39:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:24,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:24,919 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:25,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:25,120 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1095030085, now seen corresponding path program 22 times [2021-06-12 21:39:25,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:25,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928728247] [2021-06-12 21:39:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:25,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:25,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928728247] [2021-06-12 21:39:25,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928728247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:25,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259848048] [2021-06-12 21:39:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:25,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:25,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259848048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:25,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:25,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:25,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887656130] [2021-06-12 21:39:25,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:25,227 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:25,679 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-06-12 21:39:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:39:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:25,689 INFO L225 Difference]: With dead ends: 7661 [2021-06-12 21:39:25,689 INFO L226 Difference]: Without dead ends: 7661 [2021-06-12 21:39:25,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:39:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-06-12 21:39:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-06-12 21:39:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-06-12 21:39:25,775 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-06-12 21:39:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:25,776 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-06-12 21:39:25,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-06-12 21:39:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:25,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:25,780 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:25,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 21:39:25,981 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1284248383, now seen corresponding path program 23 times [2021-06-12 21:39:25,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:25,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213034183] [2021-06-12 21:39:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:26,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:26,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213034183] [2021-06-12 21:39:26,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213034183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:26,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138149437] [2021-06-12 21:39:26,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:26,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:39:26,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138149437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:26,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:26,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:26,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407876148] [2021-06-12 21:39:26,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:26,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:26,081 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:26,529 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-06-12 21:39:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:39:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:26,539 INFO L225 Difference]: With dead ends: 7294 [2021-06-12 21:39:26,539 INFO L226 Difference]: Without dead ends: 7286 [2021-06-12 21:39:26,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:39:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-06-12 21:39:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-06-12 21:39:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-06-12 21:39:26,610 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-06-12 21:39:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:26,610 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-06-12 21:39:26,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-06-12 21:39:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:26,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:26,615 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:26,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 21:39:26,820 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1799080439, now seen corresponding path program 9 times [2021-06-12 21:39:26,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:26,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078559480] [2021-06-12 21:39:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:26,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078559480] [2021-06-12 21:39:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078559480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93365964] [2021-06-12 21:39:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:26,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:39:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:26,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93365964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:26,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:26,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 21:39:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381142221] [2021-06-12 21:39:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:26,915 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:27,128 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-06-12 21:39:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:39:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:27,135 INFO L225 Difference]: With dead ends: 5160 [2021-06-12 21:39:27,135 INFO L226 Difference]: Without dead ends: 5160 [2021-06-12 21:39:27,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:39:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-06-12 21:39:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-06-12 21:39:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-06-12 21:39:27,209 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-06-12 21:39:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:27,209 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-06-12 21:39:27,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-06-12 21:39:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:27,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:27,214 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:27,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:27,415 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -640866123, now seen corresponding path program 24 times [2021-06-12 21:39:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:27,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240748328] [2021-06-12 21:39:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:27,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:27,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240748328] [2021-06-12 21:39:27,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240748328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:27,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883555473] [2021-06-12 21:39:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:27,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:39:27,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:27,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883555473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:27,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:27,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:39:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909972835] [2021-06-12 21:39:27,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:27,522 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:27,879 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-06-12 21:39:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:39:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:27,888 INFO L225 Difference]: With dead ends: 7167 [2021-06-12 21:39:27,888 INFO L226 Difference]: Without dead ends: 7135 [2021-06-12 21:39:27,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:39:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-06-12 21:39:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-06-12 21:39:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-06-12 21:39:27,957 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-06-12 21:39:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:27,957 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-06-12 21:39:27,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-06-12 21:39:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:27,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:27,962 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:28,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 21:39:28,162 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash -328510151, now seen corresponding path program 25 times [2021-06-12 21:39:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:28,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278076483] [2021-06-12 21:39:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:28,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278076483] [2021-06-12 21:39:28,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278076483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521779666] [2021-06-12 21:39:28,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:28,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521779666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:28,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:28,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:39:28,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034929141] [2021-06-12 21:39:28,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:28,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:28,309 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:28,895 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-06-12 21:39:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:39:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:28,905 INFO L225 Difference]: With dead ends: 7634 [2021-06-12 21:39:28,906 INFO L226 Difference]: Without dead ends: 7634 [2021-06-12 21:39:28,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:39:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-06-12 21:39:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-06-12 21:39:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-06-12 21:39:28,983 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-06-12 21:39:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:28,983 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-06-12 21:39:28,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-06-12 21:39:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:28,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:28,988 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:29,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:29,188 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1454139319, now seen corresponding path program 26 times [2021-06-12 21:39:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:29,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900662518] [2021-06-12 21:39:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:29,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900662518] [2021-06-12 21:39:29,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900662518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58737813] [2021-06-12 21:39:29,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:29,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:29,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:29,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:29,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58737813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:29,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:39:29,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461990330] [2021-06-12 21:39:29,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:39:29,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:39:29,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:39:29,315 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:29,793 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-06-12 21:39:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:39:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:29,823 INFO L225 Difference]: With dead ends: 7391 [2021-06-12 21:39:29,823 INFO L226 Difference]: Without dead ends: 7383 [2021-06-12 21:39:29,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:39:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-06-12 21:39:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-06-12 21:39:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-06-12 21:39:29,893 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-06-12 21:39:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-06-12 21:39:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-06-12 21:39:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:29,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:29,899 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:30,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 21:39:30,113 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 609167867, now seen corresponding path program 27 times [2021-06-12 21:39:30,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:30,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408920868] [2021-06-12 21:39:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:30,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:30,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408920868] [2021-06-12 21:39:30,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408920868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:30,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488667826] [2021-06-12 21:39:30,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:39:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:30,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488667826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:30,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:30,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:39:30,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381674723] [2021-06-12 21:39:30,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:30,232 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:30,651 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-06-12 21:39:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:39:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:30,661 INFO L225 Difference]: With dead ends: 7057 [2021-06-12 21:39:30,661 INFO L226 Difference]: Without dead ends: 7025 [2021-06-12 21:39:30,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:39:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-06-12 21:39:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-06-12 21:39:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-06-12 21:39:30,734 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-06-12 21:39:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:30,735 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-06-12 21:39:30,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-06-12 21:39:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:30,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:30,740 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:30,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 21:39:30,940 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:30,940 INFO L82 PathProgramCache]: Analyzing trace with hash 273764453, now seen corresponding path program 28 times [2021-06-12 21:39:30,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:30,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494211262] [2021-06-12 21:39:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:30,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494211262] [2021-06-12 21:39:30,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494211262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566323362] [2021-06-12 21:39:30,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:30,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:30,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:30,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:31,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566323362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:31,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:31,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:39:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492659935] [2021-06-12 21:39:31,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:39:31,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:39:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:39:31,057 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:31,366 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-06-12 21:39:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:39:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:31,374 INFO L225 Difference]: With dead ends: 6384 [2021-06-12 21:39:31,374 INFO L226 Difference]: Without dead ends: 6384 [2021-06-12 21:39:31,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:39:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-12 21:39:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-06-12 21:39:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-06-12 21:39:31,446 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-06-12 21:39:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:31,446 INFO L482 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-06-12 21:39:31,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-06-12 21:39:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:31,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:31,452 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:31,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:31,658 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 15 times [2021-06-12 21:39:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:31,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109553401] [2021-06-12 21:39:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:31,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109553401] [2021-06-12 21:39:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109553401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382087931] [2021-06-12 21:39:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:31,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:39:31,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382087931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:31,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:31,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:39:31,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146117507] [2021-06-12 21:39:31,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:31,752 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:32,056 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-06-12 21:39:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:39:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:32,066 INFO L225 Difference]: With dead ends: 6692 [2021-06-12 21:39:32,066 INFO L226 Difference]: Without dead ends: 6692 [2021-06-12 21:39:32,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:39:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-06-12 21:39:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-06-12 21:39:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-06-12 21:39:32,136 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-06-12 21:39:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:32,136 INFO L482 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-06-12 21:39:32,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-06-12 21:39:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:32,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:32,142 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:32,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:39:32,349 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 16 times [2021-06-12 21:39:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018015698] [2021-06-12 21:39:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:32,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:32,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018015698] [2021-06-12 21:39:32,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018015698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227701608] [2021-06-12 21:39:32,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:32,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:39:32,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:32,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227701608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:32,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:32,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:39:32,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766327706] [2021-06-12 21:39:32,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:39:32,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:39:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:39:32,437 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:32,697 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-06-12 21:39:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:39:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:32,705 INFO L225 Difference]: With dead ends: 6568 [2021-06-12 21:39:32,705 INFO L226 Difference]: Without dead ends: 6552 [2021-06-12 21:39:32,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:39:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-06-12 21:39:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-06-12 21:39:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-06-12 21:39:32,774 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-06-12 21:39:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:32,774 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-06-12 21:39:32,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-06-12 21:39:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:39:32,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:32,780 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:32,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:32,980 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1636343253, now seen corresponding path program 10 times [2021-06-12 21:39:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:32,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222994227] [2021-06-12 21:39:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:33,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222994227] [2021-06-12 21:39:33,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222994227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:33,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885612618] [2021-06-12 21:39:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:33,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:33,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:39:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:33,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885612618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:33,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:33,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 21:39:33,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704774588] [2021-06-12 21:39:33,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:39:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:39:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:39:33,104 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:33,285 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-06-12 21:39:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:39:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:39:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:33,292 INFO L225 Difference]: With dead ends: 5593 [2021-06-12 21:39:33,292 INFO L226 Difference]: Without dead ends: 5593 [2021-06-12 21:39:33,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:39:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-06-12 21:39:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-06-12 21:39:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-06-12 21:39:33,355 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-06-12 21:39:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:33,356 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-06-12 21:39:33,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-06-12 21:39:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:33,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:33,361 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:33,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 21:39:33,563 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:33,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1236304047, now seen corresponding path program 29 times [2021-06-12 21:39:33,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:33,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225079469] [2021-06-12 21:39:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:33,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:33,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225079469] [2021-06-12 21:39:33,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225079469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:33,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959335363] [2021-06-12 21:39:33,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:33,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:33,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:39:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:33,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:39:33,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:33,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:33,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:33,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:39:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959335363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:33,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:33,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:39:33,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699810301] [2021-06-12 21:39:33,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:39:33,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:39:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:39:33,828 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:33,957 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-06-12 21:39:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:39:33,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:33,965 INFO L225 Difference]: With dead ends: 5811 [2021-06-12 21:39:33,965 INFO L226 Difference]: Without dead ends: 5742 [2021-06-12 21:39:33,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:39:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-06-12 21:39:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-06-12 21:39:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-06-12 21:39:34,045 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-06-12 21:39:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:34,045 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-06-12 21:39:34,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-06-12 21:39:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:34,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:34,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:34,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:39:34,252 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 11 times [2021-06-12 21:39:34,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:34,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840089420] [2021-06-12 21:39:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:34,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840089420] [2021-06-12 21:39:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840089420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232071293] [2021-06-12 21:39:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:34,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:34,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:39:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:34,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:39:34,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:34,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:34,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:34,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:39:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:34,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232071293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:34,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:34,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:39:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507931241] [2021-06-12 21:39:34,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:39:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:39:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:34,867 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:36,057 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:39:36,816 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-12 21:39:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:37,625 INFO L93 Difference]: Finished difference Result 8307 states and 27178 transitions. [2021-06-12 21:39:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:39:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:37,655 INFO L225 Difference]: With dead ends: 8307 [2021-06-12 21:39:37,655 INFO L226 Difference]: Without dead ends: 8281 [2021-06-12 21:39:37,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2234.5ms TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:39:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2021-06-12 21:39:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 5254. [2021-06-12 21:39:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.379211878926328) internal successors, (17751), 5253 states have internal predecessors, (17751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 17751 transitions. [2021-06-12 21:39:37,722 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 17751 transitions. Word has length 30 [2021-06-12 21:39:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:37,722 INFO L482 AbstractCegarLoop]: Abstraction has 5254 states and 17751 transitions. [2021-06-12 21:39:37,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 17751 transitions. [2021-06-12 21:39:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:37,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:37,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:37,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:37,929 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1233935798, now seen corresponding path program 12 times [2021-06-12 21:39:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110259784] [2021-06-12 21:39:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:38,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110259784] [2021-06-12 21:39:38,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110259784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891822393] [2021-06-12 21:39:38,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:38,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:39:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:39:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:38,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:38,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:39:38,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:39:38,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:38,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:38,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-12 21:39:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:38,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891822393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:38,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:38,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-12 21:39:38,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753926992] [2021-06-12 21:39:38,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:39:38,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:39:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:39:38,563 INFO L87 Difference]: Start difference. First operand 5254 states and 17751 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:40,959 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-12 21:39:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:42,061 INFO L93 Difference]: Finished difference Result 9505 states and 30456 transitions. [2021-06-12 21:39:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:39:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:42,074 INFO L225 Difference]: With dead ends: 9505 [2021-06-12 21:39:42,074 INFO L226 Difference]: Without dead ends: 9445 [2021-06-12 21:39:42,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 2773.0ms TimeCoverageRelationStatistics Valid=674, Invalid=5332, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:39:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-06-12 21:39:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 5277. [2021-06-12 21:39:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 3.3788855193328278) internal successors, (17827), 5276 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 17827 transitions. [2021-06-12 21:39:42,162 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 17827 transitions. Word has length 30 [2021-06-12 21:39:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:42,163 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 17827 transitions. [2021-06-12 21:39:42,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 17827 transitions. [2021-06-12 21:39:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:42,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:42,168 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:42,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:42,369 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1698612030, now seen corresponding path program 13 times [2021-06-12 21:39:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742730380] [2021-06-12 21:39:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:42,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742730380] [2021-06-12 21:39:42,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742730380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786306936] [2021-06-12 21:39:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:39:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:39:42,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:42,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:42,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:42,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:39:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:42,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786306936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:42,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:42,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:39:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566630957] [2021-06-12 21:39:42,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:39:42,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:39:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:42,897 INFO L87 Difference]: Start difference. First operand 5277 states and 17827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:44,639 INFO L93 Difference]: Finished difference Result 6564 states and 21312 transitions. [2021-06-12 21:39:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:39:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:44,647 INFO L225 Difference]: With dead ends: 6564 [2021-06-12 21:39:44,647 INFO L226 Difference]: Without dead ends: 6534 [2021-06-12 21:39:44,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1487.2ms TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:39:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-06-12 21:39:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5285. [2021-06-12 21:39:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 3.3783118849356546) internal successors, (17851), 5284 states have internal predecessors, (17851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 17851 transitions. [2021-06-12 21:39:44,717 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 17851 transitions. Word has length 30 [2021-06-12 21:39:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:44,717 INFO L482 AbstractCegarLoop]: Abstraction has 5285 states and 17851 transitions. [2021-06-12 21:39:44,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 17851 transitions. [2021-06-12 21:39:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:44,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:44,723 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:44,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 21:39:44,924 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 14 times [2021-06-12 21:39:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:44,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096329061] [2021-06-12 21:39:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:45,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:45,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096329061] [2021-06-12 21:39:45,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096329061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:45,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339358527] [2021-06-12 21:39:45,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:39:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:45,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:39:45,359 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:39:45,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:45,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:45,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:39:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:45,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339358527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:45,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:45,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 21:39:45,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603183989] [2021-06-12 21:39:45,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:39:45,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:45,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:39:45,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:39:45,428 INFO L87 Difference]: Start difference. First operand 5285 states and 17851 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:48,227 INFO L93 Difference]: Finished difference Result 6989 states and 22642 transitions. [2021-06-12 21:39:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 21:39:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:48,236 INFO L225 Difference]: With dead ends: 6989 [2021-06-12 21:39:48,236 INFO L226 Difference]: Without dead ends: 6943 [2021-06-12 21:39:48,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2285.7ms TimeCoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:39:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-06-12 21:39:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5338. [2021-06-12 21:39:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.3814877271875585) internal successors, (18047), 5337 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18047 transitions. [2021-06-12 21:39:48,318 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18047 transitions. Word has length 30 [2021-06-12 21:39:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:48,318 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18047 transitions. [2021-06-12 21:39:48,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18047 transitions. [2021-06-12 21:39:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:48,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:48,324 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:48,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:48,524 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 17 times [2021-06-12 21:39:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:48,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002749494] [2021-06-12 21:39:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:48,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:48,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002749494] [2021-06-12 21:39:48,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002749494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:48,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820777934] [2021-06-12 21:39:48,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:48,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:39:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:49,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:49,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:49,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:49,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:39:49,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:49,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:49,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:49,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:39:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:49,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820777934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:49,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:49,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:39:49,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176353771] [2021-06-12 21:39:49,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:39:49,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:39:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:39:49,223 INFO L87 Difference]: Start difference. First operand 5338 states and 18047 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:51,319 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 21:39:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:52,858 INFO L93 Difference]: Finished difference Result 7096 states and 23312 transitions. [2021-06-12 21:39:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:39:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:52,867 INFO L225 Difference]: With dead ends: 7096 [2021-06-12 21:39:52,867 INFO L226 Difference]: Without dead ends: 7070 [2021-06-12 21:39:52,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3073.3ms TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:39:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-06-12 21:39:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-06-12 21:39:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3737094395280236) internal successors, (18299), 5424 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18299 transitions. [2021-06-12 21:39:52,938 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18299 transitions. Word has length 30 [2021-06-12 21:39:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:52,938 INFO L482 AbstractCegarLoop]: Abstraction has 5425 states and 18299 transitions. [2021-06-12 21:39:52,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18299 transitions. [2021-06-12 21:39:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:52,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:52,944 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:53,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:53,144 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1512137484, now seen corresponding path program 15 times [2021-06-12 21:39:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859302760] [2021-06-12 21:39:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:53,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:53,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859302760] [2021-06-12 21:39:53,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859302760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:53,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914555829] [2021-06-12 21:39:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:53,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:39:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:39:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:53,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:53,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:39:53,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:53,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:53,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:53,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:39:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:53,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914555829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:53,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:53,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:39:53,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636388938] [2021-06-12 21:39:53,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:39:53,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:39:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:39:53,681 INFO L87 Difference]: Start difference. First operand 5425 states and 18299 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:55,458 INFO L93 Difference]: Finished difference Result 6660 states and 21646 transitions. [2021-06-12 21:39:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:39:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:55,467 INFO L225 Difference]: With dead ends: 6660 [2021-06-12 21:39:55,467 INFO L226 Difference]: Without dead ends: 6630 [2021-06-12 21:39:55,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1422.1ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:39:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-06-12 21:39:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 5428. [2021-06-12 21:39:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3738713838216325) internal successors, (18310), 5427 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18310 transitions. [2021-06-12 21:39:55,538 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18310 transitions. Word has length 30 [2021-06-12 21:39:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:55,538 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18310 transitions. [2021-06-12 21:39:55,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18310 transitions. [2021-06-12 21:39:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:55,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:55,543 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:55,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-12 21:39:55,744 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 16 times [2021-06-12 21:39:55,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:55,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307236176] [2021-06-12 21:39:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:56,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307236176] [2021-06-12 21:39:56,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307236176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418147550] [2021-06-12 21:39:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:56,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:39:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:39:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:56,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:39:56,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:56,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:56,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:56,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:39:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:56,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418147550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:56,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:56,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:39:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93818216] [2021-06-12 21:39:56,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:39:56,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:39:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:39:56,232 INFO L87 Difference]: Start difference. First operand 5428 states and 18310 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:58,271 INFO L93 Difference]: Finished difference Result 6861 states and 22152 transitions. [2021-06-12 21:39:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:39:58,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:39:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:58,280 INFO L225 Difference]: With dead ends: 6861 [2021-06-12 21:39:58,280 INFO L226 Difference]: Without dead ends: 6831 [2021-06-12 21:39:58,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1792.3ms TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:39:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2021-06-12 21:39:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 5431. [2021-06-12 21:39:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.3740331491712707) internal successors, (18321), 5430 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18321 transitions. [2021-06-12 21:39:58,349 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18321 transitions. Word has length 30 [2021-06-12 21:39:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:58,349 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 18321 transitions. [2021-06-12 21:39:58,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18321 transitions. [2021-06-12 21:39:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:39:58,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:58,355 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:39:58,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:58,555 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 822848258, now seen corresponding path program 17 times [2021-06-12 21:39:58,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:58,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892637315] [2021-06-12 21:39:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:58,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:58,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892637315] [2021-06-12 21:39:58,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892637315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:58,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174872293] [2021-06-12 21:39:58,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:58,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:39:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:58,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:39:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:59,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:39:59,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:59,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:59,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:59,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-12 21:39:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:39:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174872293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:59,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:59,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-12 21:39:59,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390336054] [2021-06-12 21:39:59,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:39:59,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:39:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:39:59,025 INFO L87 Difference]: Start difference. First operand 5431 states and 18321 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:00,138 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-12 21:40:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:01,458 INFO L93 Difference]: Finished difference Result 6718 states and 21814 transitions. [2021-06-12 21:40:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:40:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:01,468 INFO L225 Difference]: With dead ends: 6718 [2021-06-12 21:40:01,468 INFO L226 Difference]: Without dead ends: 6688 [2021-06-12 21:40:01,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1943.9ms TimeCoverageRelationStatistics Valid=430, Invalid=2762, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:40:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-06-12 21:40:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5426. [2021-06-12 21:40:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 5425 states have (on average 3.3741935483870966) internal successors, (18305), 5425 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 18305 transitions. [2021-06-12 21:40:01,544 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 18305 transitions. Word has length 30 [2021-06-12 21:40:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:01,544 INFO L482 AbstractCegarLoop]: Abstraction has 5426 states and 18305 transitions. [2021-06-12 21:40:01,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 18305 transitions. [2021-06-12 21:40:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:01,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:01,550 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:01,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:01,751 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -727723502, now seen corresponding path program 18 times [2021-06-12 21:40:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:01,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100054369] [2021-06-12 21:40:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:01,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:01,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100054369] [2021-06-12 21:40:01,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100054369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:01,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276975939] [2021-06-12 21:40:01,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:01,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:40:01,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:40:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:02,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:40:02,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:40:02,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:02,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:02,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-12 21:40:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:02,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276975939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:02,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:02,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 21:40:02,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400310179] [2021-06-12 21:40:02,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:40:02,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:40:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:40:02,344 INFO L87 Difference]: Start difference. First operand 5426 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:04,270 INFO L93 Difference]: Finished difference Result 9647 states and 31226 transitions. [2021-06-12 21:40:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:40:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:04,283 INFO L225 Difference]: With dead ends: 9647 [2021-06-12 21:40:04,283 INFO L226 Difference]: Without dead ends: 9632 [2021-06-12 21:40:04,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1407.7ms TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:40:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-06-12 21:40:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 5430. [2021-06-12 21:40:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.375391416467121) internal successors, (18325), 5429 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18325 transitions. [2021-06-12 21:40:04,376 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18325 transitions. Word has length 30 [2021-06-12 21:40:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:04,376 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18325 transitions. [2021-06-12 21:40:04,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18325 transitions. [2021-06-12 21:40:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:04,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:04,383 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:04,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-12 21:40:04,583 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1710814064, now seen corresponding path program 19 times [2021-06-12 21:40:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:04,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464983287] [2021-06-12 21:40:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:04,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464983287] [2021-06-12 21:40:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464983287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458435995] [2021-06-12 21:40:04,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:40:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:04,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:40:04,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:04,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:04,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:04,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:40:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458435995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:40:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583957808] [2021-06-12 21:40:05,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:40:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:40:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:40:05,008 INFO L87 Difference]: Start difference. First operand 5430 states and 18325 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:08,297 INFO L93 Difference]: Finished difference Result 9941 states and 32572 transitions. [2021-06-12 21:40:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:40:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:08,311 INFO L225 Difference]: With dead ends: 9941 [2021-06-12 21:40:08,311 INFO L226 Difference]: Without dead ends: 9926 [2021-06-12 21:40:08,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2504.4ms TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 21:40:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-06-12 21:40:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 5432. [2021-06-12 21:40:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 3.3758055606702264) internal successors, (18334), 5431 states have internal predecessors, (18334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 18334 transitions. [2021-06-12 21:40:08,398 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 18334 transitions. Word has length 30 [2021-06-12 21:40:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:08,398 INFO L482 AbstractCegarLoop]: Abstraction has 5432 states and 18334 transitions. [2021-06-12 21:40:08,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 18334 transitions. [2021-06-12 21:40:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:08,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:08,404 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:08,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:08,608 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 20 times [2021-06-12 21:40:08,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:08,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115222671] [2021-06-12 21:40:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:08,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:08,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115222671] [2021-06-12 21:40:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115222671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:08,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713705577] [2021-06-12 21:40:08,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:08,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:08,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:40:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:08,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:08,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:40:08,950 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:08,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:08,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:08,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:40:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:09,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713705577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:09,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:09,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:40:09,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956893556] [2021-06-12 21:40:09,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:40:09,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:09,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:40:09,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:40:09,002 INFO L87 Difference]: Start difference. First operand 5432 states and 18334 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:12,628 INFO L93 Difference]: Finished difference Result 11162 states and 36367 transitions. [2021-06-12 21:40:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 21:40:12,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:12,644 INFO L225 Difference]: With dead ends: 11162 [2021-06-12 21:40:12,644 INFO L226 Difference]: Without dead ends: 11122 [2021-06-12 21:40:12,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2729.9ms TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 21:40:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-12 21:40:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 5474. [2021-06-12 21:40:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.379499360496985) internal successors, (18496), 5473 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18496 transitions. [2021-06-12 21:40:12,747 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18496 transitions. Word has length 30 [2021-06-12 21:40:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:12,747 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18496 transitions. [2021-06-12 21:40:12,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18496 transitions. [2021-06-12 21:40:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:12,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:12,753 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:12,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-12 21:40:12,955 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -871815986, now seen corresponding path program 21 times [2021-06-12 21:40:12,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:12,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157709144] [2021-06-12 21:40:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:13,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157709144] [2021-06-12 21:40:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157709144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367763514] [2021-06-12 21:40:13,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:13,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:40:13,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:40:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:13,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:13,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:40:13,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:40:13,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:13,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:13,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-12 21:40:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:13,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367763514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:13,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:13,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 21:40:13,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620844638] [2021-06-12 21:40:13,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:40:13,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:13,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:40:13,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:40:13,626 INFO L87 Difference]: Start difference. First operand 5474 states and 18496 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:16,326 INFO L93 Difference]: Finished difference Result 7786 states and 25626 transitions. [2021-06-12 21:40:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:40:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:16,337 INFO L225 Difference]: With dead ends: 7786 [2021-06-12 21:40:16,337 INFO L226 Difference]: Without dead ends: 7726 [2021-06-12 21:40:16,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2361.1ms TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:40:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-12 21:40:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5478. [2021-06-12 21:40:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 3.3795873653459925) internal successors, (18510), 5477 states have internal predecessors, (18510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 18510 transitions. [2021-06-12 21:40:16,415 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 18510 transitions. Word has length 30 [2021-06-12 21:40:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:16,415 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 18510 transitions. [2021-06-12 21:40:16,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 18510 transitions. [2021-06-12 21:40:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:16,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:16,421 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:16,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:16,622 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash -462088070, now seen corresponding path program 22 times [2021-06-12 21:40:16,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:16,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137020995] [2021-06-12 21:40:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:16,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137020995] [2021-06-12 21:40:16,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137020995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410117663] [2021-06-12 21:40:16,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:16,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:40:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:17,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:17,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:40:17,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:17,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:17,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:40:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:17,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410117663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:17,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:17,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:40:17,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837110851] [2021-06-12 21:40:17,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:40:17,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:40:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:40:17,123 INFO L87 Difference]: Start difference. First operand 5478 states and 18510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:19,436 INFO L93 Difference]: Finished difference Result 7437 states and 24428 transitions. [2021-06-12 21:40:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:40:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:19,446 INFO L225 Difference]: With dead ends: 7437 [2021-06-12 21:40:19,447 INFO L226 Difference]: Without dead ends: 7422 [2021-06-12 21:40:19,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1939.8ms TimeCoverageRelationStatistics Valid=550, Invalid=3110, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:40:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-12 21:40:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5480. [2021-06-12 21:40:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.37999634969885) internal successors, (18519), 5479 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18519 transitions. [2021-06-12 21:40:19,525 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18519 transitions. Word has length 30 [2021-06-12 21:40:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:19,525 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18519 transitions. [2021-06-12 21:40:19,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18519 transitions. [2021-06-12 21:40:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:19,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:19,532 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 21:40:19,732 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1933873822, now seen corresponding path program 23 times [2021-06-12 21:40:19,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:19,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585173844] [2021-06-12 21:40:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:20,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:20,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585173844] [2021-06-12 21:40:20,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585173844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:20,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463385210] [2021-06-12 21:40:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:20,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:40:20,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:40:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:20,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:20,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:40:20,143 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:20,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:20,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:20,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:40:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:20,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463385210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:20,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:20,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 21:40:20,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285463155] [2021-06-12 21:40:20,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:40:20,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:40:20,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:40:20,199 INFO L87 Difference]: Start difference. First operand 5480 states and 18519 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:24,100 INFO L93 Difference]: Finished difference Result 8651 states and 28099 transitions. [2021-06-12 21:40:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 21:40:24,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:24,112 INFO L225 Difference]: With dead ends: 8651 [2021-06-12 21:40:24,112 INFO L226 Difference]: Without dead ends: 8626 [2021-06-12 21:40:24,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3161.0ms TimeCoverageRelationStatistics Valid=720, Invalid=5442, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:40:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-12 21:40:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 5486. [2021-06-12 21:40:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3808568824065635) internal successors, (18544), 5485 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18544 transitions. [2021-06-12 21:40:24,200 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18544 transitions. Word has length 30 [2021-06-12 21:40:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:24,200 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18544 transitions. [2021-06-12 21:40:24,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18544 transitions. [2021-06-12 21:40:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:24,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:24,206 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:24,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 21:40:24,407 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 372399859, now seen corresponding path program 18 times [2021-06-12 21:40:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:24,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264843361] [2021-06-12 21:40:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:24,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:24,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264843361] [2021-06-12 21:40:24,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264843361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:24,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177321275] [2021-06-12 21:40:24,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:24,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:40:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:40:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:25,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:25,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 21:40:25,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:40:25,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:25,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:25,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-12 21:40:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177321275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:25,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:40:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414583283] [2021-06-12 21:40:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:25,217 INFO L87 Difference]: Start difference. First operand 5486 states and 18544 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:30,349 INFO L93 Difference]: Finished difference Result 8032 states and 26021 transitions. [2021-06-12 21:40:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 21:40:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:30,359 INFO L225 Difference]: With dead ends: 8032 [2021-06-12 21:40:30,359 INFO L226 Difference]: Without dead ends: 7995 [2021-06-12 21:40:30,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 4110.9ms TimeCoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 21:40:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-12 21:40:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5520. [2021-06-12 21:40:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 3.3812284834209096) internal successors, (18661), 5519 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 18661 transitions. [2021-06-12 21:40:30,433 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 18661 transitions. Word has length 30 [2021-06-12 21:40:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:30,433 INFO L482 AbstractCegarLoop]: Abstraction has 5520 states and 18661 transitions. [2021-06-12 21:40:30,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 18661 transitions. [2021-06-12 21:40:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:30,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:30,439 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:30,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 21:40:30,641 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:30,641 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 19 times [2021-06-12 21:40:30,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:30,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439551850] [2021-06-12 21:40:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:30,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:30,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439551850] [2021-06-12 21:40:30,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439551850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:30,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611584818] [2021-06-12 21:40:30,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:40:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:31,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:40:31,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:31,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:31,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:31,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:40:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:31,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611584818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:31,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:31,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:40:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501956470] [2021-06-12 21:40:31,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:40:31,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:31,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:40:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:40:31,161 INFO L87 Difference]: Start difference. First operand 5520 states and 18661 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:33,985 INFO L93 Difference]: Finished difference Result 9535 states and 31254 transitions. [2021-06-12 21:40:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:40:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:34,021 INFO L225 Difference]: With dead ends: 9535 [2021-06-12 21:40:34,021 INFO L226 Difference]: Without dead ends: 9505 [2021-06-12 21:40:34,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2474.2ms TimeCoverageRelationStatistics Valid=693, Invalid=3863, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:40:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2021-06-12 21:40:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 5583. [2021-06-12 21:40:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 3.3885704048728056) internal successors, (18915), 5582 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 18915 transitions. [2021-06-12 21:40:34,106 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 18915 transitions. Word has length 30 [2021-06-12 21:40:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:34,106 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 18915 transitions. [2021-06-12 21:40:34,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 18915 transitions. [2021-06-12 21:40:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:34,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:34,112 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:34,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:34,312 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 20 times [2021-06-12 21:40:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:34,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900527334] [2021-06-12 21:40:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:34,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:34,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900527334] [2021-06-12 21:40:34,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900527334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:34,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544554856] [2021-06-12 21:40:34,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:40:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:34,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 21:40:34,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:40:34,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:34,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-12 21:40:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544554856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:34,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:34,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-12 21:40:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362606350] [2021-06-12 21:40:34,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:40:34,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:40:34,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:40:34,835 INFO L87 Difference]: Start difference. First operand 5583 states and 18915 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:41,197 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-12 21:40:42,933 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 21:40:43,512 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 21:40:45,003 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 21:40:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:45,672 INFO L93 Difference]: Finished difference Result 11977 states and 38541 transitions. [2021-06-12 21:40:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-12 21:40:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:45,689 INFO L225 Difference]: With dead ends: 11977 [2021-06-12 21:40:45,689 INFO L226 Difference]: Without dead ends: 11930 [2021-06-12 21:40:45,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 9453.5ms TimeCoverageRelationStatistics Valid=3976, Invalid=22756, Unknown=0, NotChecked=0, Total=26732 [2021-06-12 21:40:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2021-06-12 21:40:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 5693. [2021-06-12 21:40:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.3979269149683766) internal successors, (19341), 5692 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 19341 transitions. [2021-06-12 21:40:45,818 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 19341 transitions. Word has length 30 [2021-06-12 21:40:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:45,818 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 19341 transitions. [2021-06-12 21:40:45,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 19341 transitions. [2021-06-12 21:40:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:45,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:45,825 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:46,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 21:40:46,025 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 21 times [2021-06-12 21:40:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:46,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493566449] [2021-06-12 21:40:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:46,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493566449] [2021-06-12 21:40:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493566449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373699168] [2021-06-12 21:40:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:46,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:40:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:40:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:46,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:40:46,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:46,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:46,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:46,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:40:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373699168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:46,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:40:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901507770] [2021-06-12 21:40:46,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:40:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:40:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:40:46,724 INFO L87 Difference]: Start difference. First operand 5693 states and 19341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:51,409 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-12 21:40:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:51,957 INFO L93 Difference]: Finished difference Result 7655 states and 25147 transitions. [2021-06-12 21:40:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 21:40:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:51,967 INFO L225 Difference]: With dead ends: 7655 [2021-06-12 21:40:51,967 INFO L226 Difference]: Without dead ends: 7629 [2021-06-12 21:40:51,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4143.2ms TimeCoverageRelationStatistics Valid=738, Invalid=6234, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:40:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-06-12 21:40:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5684. [2021-06-12 21:40:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 3.39767728312511) internal successors, (19309), 5683 states have internal predecessors, (19309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 19309 transitions. [2021-06-12 21:40:52,042 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 19309 transitions. Word has length 30 [2021-06-12 21:40:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:52,042 INFO L482 AbstractCegarLoop]: Abstraction has 5684 states and 19309 transitions. [2021-06-12 21:40:52,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 19309 transitions. [2021-06-12 21:40:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:52,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:52,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:52,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 21:40:52,249 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1069732346, now seen corresponding path program 24 times [2021-06-12 21:40:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:52,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268634085] [2021-06-12 21:40:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:52,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268634085] [2021-06-12 21:40:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268634085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260305548] [2021-06-12 21:40:52,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:52,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:40:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:40:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:52,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:40:52,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:52,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:52,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:52,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:40:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:52,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260305548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:52,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:52,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:40:52,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468004165] [2021-06-12 21:40:52,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:40:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:52,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:40:52,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:40:52,715 INFO L87 Difference]: Start difference. First operand 5684 states and 19309 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:54,277 INFO L93 Difference]: Finished difference Result 6886 states and 22588 transitions. [2021-06-12 21:40:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:40:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:54,286 INFO L225 Difference]: With dead ends: 6886 [2021-06-12 21:40:54,286 INFO L226 Difference]: Without dead ends: 6871 [2021-06-12 21:40:54,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1292.7ms TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:40:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-12 21:40:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5694. [2021-06-12 21:40:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3975057087651503) internal successors, (19342), 5693 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19342 transitions. [2021-06-12 21:40:54,361 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19342 transitions. Word has length 30 [2021-06-12 21:40:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:54,361 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19342 transitions. [2021-06-12 21:40:54,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19342 transitions. [2021-06-12 21:40:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:54,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:54,367 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:54,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:54,568 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 25 times [2021-06-12 21:40:54,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:54,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879947199] [2021-06-12 21:40:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:54,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:54,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879947199] [2021-06-12 21:40:54,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879947199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:54,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803458867] [2021-06-12 21:40:54,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:40:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:55,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:40:55,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:55,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:55,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:55,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:40:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803458867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:55,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:55,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:40:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688070200] [2021-06-12 21:40:55,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:40:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:40:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:40:55,042 INFO L87 Difference]: Start difference. First operand 5694 states and 19342 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:56,426 INFO L93 Difference]: Finished difference Result 6877 states and 22547 transitions. [2021-06-12 21:40:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:40:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:56,435 INFO L225 Difference]: With dead ends: 6877 [2021-06-12 21:40:56,435 INFO L226 Difference]: Without dead ends: 6847 [2021-06-12 21:40:56,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1249.6ms TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:40:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-06-12 21:40:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 5686. [2021-06-12 21:40:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 3.39806508355321) internal successors, (19318), 5685 states have internal predecessors, (19318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 19318 transitions. [2021-06-12 21:40:56,509 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 19318 transitions. Word has length 30 [2021-06-12 21:40:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:56,509 INFO L482 AbstractCegarLoop]: Abstraction has 5686 states and 19318 transitions. [2021-06-12 21:40:56,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 19318 transitions. [2021-06-12 21:40:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:56,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:56,515 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:40:56,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:56,716 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2028611540, now seen corresponding path program 26 times [2021-06-12 21:40:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:56,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499205427] [2021-06-12 21:40:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:57,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499205427] [2021-06-12 21:40:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499205427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408784989] [2021-06-12 21:40:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:40:57,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:40:57,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:57,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:40:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:57,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:40:57,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:57,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:40:57,248 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:57,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:57,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:57,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:40:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:40:57,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408784989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:57,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:57,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:40:57,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880541916] [2021-06-12 21:40:57,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:40:57,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:40:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:40:57,296 INFO L87 Difference]: Start difference. First operand 5686 states and 19318 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:59,770 INFO L93 Difference]: Finished difference Result 10041 states and 32850 transitions. [2021-06-12 21:40:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:40:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:40:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:59,784 INFO L225 Difference]: With dead ends: 10041 [2021-06-12 21:40:59,784 INFO L226 Difference]: Without dead ends: 9990 [2021-06-12 21:40:59,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1872.4ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:40:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-12 21:40:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 5722. [2021-06-12 21:40:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3997552875371437) internal successors, (19450), 5721 states have internal predecessors, (19450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19450 transitions. [2021-06-12 21:40:59,883 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19450 transitions. Word has length 30 [2021-06-12 21:40:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:59,883 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19450 transitions. [2021-06-12 21:40:59,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19450 transitions. [2021-06-12 21:40:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:40:59,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:59,889 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:00,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:00,089 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 904208534, now seen corresponding path program 27 times [2021-06-12 21:41:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:00,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006637124] [2021-06-12 21:41:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:00,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006637124] [2021-06-12 21:41:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006637124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096380181] [2021-06-12 21:41:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:00,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:41:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:00,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:41:00,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:41:00,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:00,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:00,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-12 21:41:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:00,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096380181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:00,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:00,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 21:41:00,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972179902] [2021-06-12 21:41:00,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:00,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:00,670 INFO L87 Difference]: Start difference. First operand 5722 states and 19450 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:05,992 INFO L93 Difference]: Finished difference Result 9402 states and 30638 transitions. [2021-06-12 21:41:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-12 21:41:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:06,005 INFO L225 Difference]: With dead ends: 9402 [2021-06-12 21:41:06,005 INFO L226 Difference]: Without dead ends: 9361 [2021-06-12 21:41:06,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4393.6ms TimeCoverageRelationStatistics Valid=1092, Invalid=9008, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 21:41:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-06-12 21:41:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 5721. [2021-06-12 21:41:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 3.3998251748251747) internal successors, (19447), 5720 states have internal predecessors, (19447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 19447 transitions. [2021-06-12 21:41:06,098 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 19447 transitions. Word has length 30 [2021-06-12 21:41:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:06,098 INFO L482 AbstractCegarLoop]: Abstraction has 5721 states and 19447 transitions. [2021-06-12 21:41:06,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 19447 transitions. [2021-06-12 21:41:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:06,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:06,104 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:06,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 21:41:06,305 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 981599646, now seen corresponding path program 28 times [2021-06-12 21:41:06,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:06,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018058424] [2021-06-12 21:41:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018058424] [2021-06-12 21:41:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018058424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437071243] [2021-06-12 21:41:06,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:06,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:06,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:06,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:06,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:06,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:06,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:06,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437071243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:06,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:06,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:41:06,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096129907] [2021-06-12 21:41:06,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:41:06,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:41:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:41:06,734 INFO L87 Difference]: Start difference. First operand 5721 states and 19447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:08,309 INFO L93 Difference]: Finished difference Result 7360 states and 24539 transitions. [2021-06-12 21:41:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:41:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:08,321 INFO L225 Difference]: With dead ends: 7360 [2021-06-12 21:41:08,321 INFO L226 Difference]: Without dead ends: 7345 [2021-06-12 21:41:08,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1188.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:41:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-06-12 21:41:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5726. [2021-06-12 21:41:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.399475982532751) internal successors, (19462), 5725 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 19462 transitions. [2021-06-12 21:41:08,403 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 19462 transitions. Word has length 30 [2021-06-12 21:41:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:08,403 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 19462 transitions. [2021-06-12 21:41:08,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 19462 transitions. [2021-06-12 21:41:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:08,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:08,409 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:08,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:08,610 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -932624076, now seen corresponding path program 29 times [2021-06-12 21:41:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:08,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019636374] [2021-06-12 21:41:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:08,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:08,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019636374] [2021-06-12 21:41:08,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019636374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:08,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37549512] [2021-06-12 21:41:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:08,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:41:08,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:41:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:09,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:09,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:41:09,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:09,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:09,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:09,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-12 21:41:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:09,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37549512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:09,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:09,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 21:41:09,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63355952] [2021-06-12 21:41:09,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:41:09,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:41:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:41:09,041 INFO L87 Difference]: Start difference. First operand 5726 states and 19462 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:10,520 INFO L93 Difference]: Finished difference Result 7333 states and 24469 transitions. [2021-06-12 21:41:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:41:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:10,532 INFO L225 Difference]: With dead ends: 7333 [2021-06-12 21:41:10,532 INFO L226 Difference]: Without dead ends: 7318 [2021-06-12 21:41:10,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:41:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-12 21:41:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5723. [2021-06-12 21:41:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.399860188745194) internal successors, (19454), 5722 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19454 transitions. [2021-06-12 21:41:10,613 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19454 transitions. Word has length 30 [2021-06-12 21:41:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:10,613 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19454 transitions. [2021-06-12 21:41:10,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19454 transitions. [2021-06-12 21:41:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:10,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:10,619 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:10,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:10,820 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 946570758, now seen corresponding path program 30 times [2021-06-12 21:41:10,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:10,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646486] [2021-06-12 21:41:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:11,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:11,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646486] [2021-06-12 21:41:11,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:11,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681160863] [2021-06-12 21:41:11,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:11,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:41:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:11,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:11,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:41:11,204 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:11,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:11,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:11,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:41:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:11,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681160863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:11,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:11,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 21:41:11,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098992706] [2021-06-12 21:41:11,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:41:11,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:41:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:41:11,271 INFO L87 Difference]: Start difference. First operand 5723 states and 19454 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:14,149 INFO L93 Difference]: Finished difference Result 7729 states and 25674 transitions. [2021-06-12 21:41:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 21:41:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:14,160 INFO L225 Difference]: With dead ends: 7729 [2021-06-12 21:41:14,160 INFO L226 Difference]: Without dead ends: 7704 [2021-06-12 21:41:14,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2432.8ms TimeCoverageRelationStatistics Valid=615, Invalid=4077, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:41:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2021-06-12 21:41:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 5705. [2021-06-12 21:41:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.399193548387097) internal successors, (19389), 5704 states have internal predecessors, (19389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 19389 transitions. [2021-06-12 21:41:14,245 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 19389 transitions. Word has length 30 [2021-06-12 21:41:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:14,245 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 19389 transitions. [2021-06-12 21:41:14,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 19389 transitions. [2021-06-12 21:41:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:14,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:14,252 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:14,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-12 21:41:14,452 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 31 times [2021-06-12 21:41:14,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:14,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950768134] [2021-06-12 21:41:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:14,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950768134] [2021-06-12 21:41:14,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950768134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023737935] [2021-06-12 21:41:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:14,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:14,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:14,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:14,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:14,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:14,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023737935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:14,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:14,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:41:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294816851] [2021-06-12 21:41:14,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:41:14,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:41:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:41:14,915 INFO L87 Difference]: Start difference. First operand 5705 states and 19389 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:16,860 INFO L93 Difference]: Finished difference Result 7595 states and 25322 transitions. [2021-06-12 21:41:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:41:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:16,870 INFO L225 Difference]: With dead ends: 7595 [2021-06-12 21:41:16,870 INFO L226 Difference]: Without dead ends: 7580 [2021-06-12 21:41:16,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1552.2ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:41:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2021-06-12 21:41:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 5709. [2021-06-12 21:41:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.399614576033637) internal successors, (19405), 5708 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 19405 transitions. [2021-06-12 21:41:16,951 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 19405 transitions. Word has length 30 [2021-06-12 21:41:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:16,952 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 19405 transitions. [2021-06-12 21:41:16,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 19405 transitions. [2021-06-12 21:41:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:16,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:16,958 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:17,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 21:41:17,158 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -272462056, now seen corresponding path program 32 times [2021-06-12 21:41:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:17,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789303741] [2021-06-12 21:41:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:17,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789303741] [2021-06-12 21:41:17,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789303741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52623444] [2021-06-12 21:41:17,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:17,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:17,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:41:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:17,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:41:17,543 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:17,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:17,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:17,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:41:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52623444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:17,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:41:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73829116] [2021-06-12 21:41:17,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:41:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:41:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:41:17,605 INFO L87 Difference]: Start difference. First operand 5709 states and 19405 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:20,950 INFO L93 Difference]: Finished difference Result 8496 states and 28174 transitions. [2021-06-12 21:41:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 21:41:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:20,962 INFO L225 Difference]: With dead ends: 8496 [2021-06-12 21:41:20,962 INFO L226 Difference]: Without dead ends: 8471 [2021-06-12 21:41:20,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2897.0ms TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:41:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-06-12 21:41:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 5694. [2021-06-12 21:41:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3990865975759705) internal successors, (19351), 5693 states have internal predecessors, (19351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19351 transitions. [2021-06-12 21:41:21,053 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19351 transitions. Word has length 30 [2021-06-12 21:41:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:21,053 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19351 transitions. [2021-06-12 21:41:21,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19351 transitions. [2021-06-12 21:41:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:21,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:21,059 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:21,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 21:41:21,259 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1633979309, now seen corresponding path program 30 times [2021-06-12 21:41:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:21,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437331579] [2021-06-12 21:41:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:21,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:21,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437331579] [2021-06-12 21:41:21,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437331579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:21,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128671427] [2021-06-12 21:41:21,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:21,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:41:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:21,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:21,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:41:21,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:41:21,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:21,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:21,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-06-12 21:41:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128671427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:21,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:21,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-12 21:41:21,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541144890] [2021-06-12 21:41:21,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:41:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:41:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:41:21,638 INFO L87 Difference]: Start difference. First operand 5694 states and 19351 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:22,401 INFO L93 Difference]: Finished difference Result 7140 states and 23704 transitions. [2021-06-12 21:41:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:41:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:22,412 INFO L225 Difference]: With dead ends: 7140 [2021-06-12 21:41:22,412 INFO L226 Difference]: Without dead ends: 7002 [2021-06-12 21:41:22,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:41:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-06-12 21:41:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 5718. [2021-06-12 21:41:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 3.3998600664684275) internal successors, (19437), 5717 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 19437 transitions. [2021-06-12 21:41:22,495 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 19437 transitions. Word has length 30 [2021-06-12 21:41:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:22,495 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 19437 transitions. [2021-06-12 21:41:22,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 19437 transitions. [2021-06-12 21:41:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:22,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:22,501 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:22,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 21:41:22,702 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 33 times [2021-06-12 21:41:22,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:22,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420826893] [2021-06-12 21:41:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:23,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:23,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420826893] [2021-06-12 21:41:23,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420826893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:23,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756986531] [2021-06-12 21:41:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:23,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:41:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:23,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 21:41:23,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:23,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:23,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:23,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-12 21:41:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:23,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756986531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:23,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:23,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-12 21:41:23,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887377946] [2021-06-12 21:41:23,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:23,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:23,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:23,395 INFO L87 Difference]: Start difference. First operand 5718 states and 19437 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:24,261 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 21:41:24,720 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-12 21:41:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:25,585 INFO L93 Difference]: Finished difference Result 8751 states and 28822 transitions. [2021-06-12 21:41:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:41:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:25,597 INFO L225 Difference]: With dead ends: 8751 [2021-06-12 21:41:25,597 INFO L226 Difference]: Without dead ends: 8725 [2021-06-12 21:41:25,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1796.0ms TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:41:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-06-12 21:41:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 5809. [2021-06-12 21:41:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 3.4013429752066116) internal successors, (19755), 5808 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 19755 transitions. [2021-06-12 21:41:25,698 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 19755 transitions. Word has length 30 [2021-06-12 21:41:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:25,698 INFO L482 AbstractCegarLoop]: Abstraction has 5809 states and 19755 transitions. [2021-06-12 21:41:25,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 19755 transitions. [2021-06-12 21:41:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:25,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:25,705 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:25,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:25,905 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -190748142, now seen corresponding path program 34 times [2021-06-12 21:41:25,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:25,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507897245] [2021-06-12 21:41:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:26,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:26,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507897245] [2021-06-12 21:41:26,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507897245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:26,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839904720] [2021-06-12 21:41:26,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:26,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:26,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:26,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:26,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:26,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:26,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:26,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839904720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:26,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:26,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:26,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256082576] [2021-06-12 21:41:26,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:26,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:26,302 INFO L87 Difference]: Start difference. First operand 5809 states and 19755 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:28,319 INFO L93 Difference]: Finished difference Result 10525 states and 34115 transitions. [2021-06-12 21:41:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:41:28,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:28,335 INFO L225 Difference]: With dead ends: 10525 [2021-06-12 21:41:28,336 INFO L226 Difference]: Without dead ends: 10504 [2021-06-12 21:41:28,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1491.2ms TimeCoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:41:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-06-12 21:41:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 5873. [2021-06-12 21:41:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 3.403440054495913) internal successors, (19985), 5872 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 19985 transitions. [2021-06-12 21:41:28,440 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 19985 transitions. Word has length 30 [2021-06-12 21:41:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:28,440 INFO L482 AbstractCegarLoop]: Abstraction has 5873 states and 19985 transitions. [2021-06-12 21:41:28,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 19985 transitions. [2021-06-12 21:41:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:28,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:28,447 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:28,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:28,647 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2047177872, now seen corresponding path program 35 times [2021-06-12 21:41:28,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:28,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055169237] [2021-06-12 21:41:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:28,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055169237] [2021-06-12 21:41:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055169237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258348346] [2021-06-12 21:41:28,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:28,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:41:28,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:29,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:29,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:29,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:29,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:29,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:29,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258348346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:29,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:29,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:29,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792603630] [2021-06-12 21:41:29,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:29,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:29,075 INFO L87 Difference]: Start difference. First operand 5873 states and 19985 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:30,450 INFO L93 Difference]: Finished difference Result 9687 states and 31917 transitions. [2021-06-12 21:41:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:41:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:30,464 INFO L225 Difference]: With dead ends: 9687 [2021-06-12 21:41:30,464 INFO L226 Difference]: Without dead ends: 9666 [2021-06-12 21:41:30,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1060.3ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:41:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-12 21:41:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5903. [2021-06-12 21:41:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 3.4056252117926125) internal successors, (20100), 5902 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 20100 transitions. [2021-06-12 21:41:30,560 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 20100 transitions. Word has length 30 [2021-06-12 21:41:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:30,560 INFO L482 AbstractCegarLoop]: Abstraction has 5903 states and 20100 transitions. [2021-06-12 21:41:30,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 20100 transitions. [2021-06-12 21:41:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:30,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:30,567 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:30,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:30,767 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 36 times [2021-06-12 21:41:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:30,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786900767] [2021-06-12 21:41:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:30,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:30,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786900767] [2021-06-12 21:41:30,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786900767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:30,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818807915] [2021-06-12 21:41:30,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:30,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:41:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:30,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:31,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:31,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:31,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:41:31,184 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:31,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:31,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:31,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:41:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:31,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818807915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:31,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:31,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:31,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65175045] [2021-06-12 21:41:31,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:31,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:31,238 INFO L87 Difference]: Start difference. First operand 5903 states and 20100 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:33,420 INFO L93 Difference]: Finished difference Result 10523 states and 34450 transitions. [2021-06-12 21:41:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:41:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:33,436 INFO L225 Difference]: With dead ends: 10523 [2021-06-12 21:41:33,436 INFO L226 Difference]: Without dead ends: 10456 [2021-06-12 21:41:33,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1628.7ms TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:41:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-06-12 21:41:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 5965. [2021-06-12 21:41:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 3.416834339369551) internal successors, (20378), 5964 states have internal predecessors, (20378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 20378 transitions. [2021-06-12 21:41:33,542 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 20378 transitions. Word has length 30 [2021-06-12 21:41:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:33,542 INFO L482 AbstractCegarLoop]: Abstraction has 5965 states and 20378 transitions. [2021-06-12 21:41:33,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 20378 transitions. [2021-06-12 21:41:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:33,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:33,548 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:33,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-12 21:41:33,749 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 37 times [2021-06-12 21:41:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:33,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944969023] [2021-06-12 21:41:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:33,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:33,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944969023] [2021-06-12 21:41:33,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944969023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:33,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926800743] [2021-06-12 21:41:33,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:34,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:41:34,107 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:34,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:34,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:34,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:41:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:34,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926800743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:34,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:34,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:34,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807498641] [2021-06-12 21:41:34,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:34,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:34,173 INFO L87 Difference]: Start difference. First operand 5965 states and 20378 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:35,334 INFO L93 Difference]: Finished difference Result 9182 states and 30455 transitions. [2021-06-12 21:41:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:41:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:35,348 INFO L225 Difference]: With dead ends: 9182 [2021-06-12 21:41:35,348 INFO L226 Difference]: Without dead ends: 9105 [2021-06-12 21:41:35,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:41:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-06-12 21:41:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 5990. [2021-06-12 21:41:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 3.418600768074804) internal successors, (20474), 5989 states have internal predecessors, (20474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 20474 transitions. [2021-06-12 21:41:35,443 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 20474 transitions. Word has length 30 [2021-06-12 21:41:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:35,443 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 20474 transitions. [2021-06-12 21:41:35,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 20474 transitions. [2021-06-12 21:41:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:35,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:35,450 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:35,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 21:41:35,651 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2029342979, now seen corresponding path program 31 times [2021-06-12 21:41:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998440202] [2021-06-12 21:41:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:35,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:35,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998440202] [2021-06-12 21:41:35,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998440202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:35,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921552562] [2021-06-12 21:41:35,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:41:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:35,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:35,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:35,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:35,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:41:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921552562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:35,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:35,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:41:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856560565] [2021-06-12 21:41:35,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:41:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:41:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:41:35,888 INFO L87 Difference]: Start difference. First operand 5990 states and 20474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:36,016 INFO L93 Difference]: Finished difference Result 6518 states and 22032 transitions. [2021-06-12 21:41:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:41:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:36,024 INFO L225 Difference]: With dead ends: 6518 [2021-06-12 21:41:36,024 INFO L226 Difference]: Without dead ends: 6449 [2021-06-12 21:41:36,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:41:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-06-12 21:41:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6000. [2021-06-12 21:41:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 3.4140690115019168) internal successors, (20481), 5999 states have internal predecessors, (20481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 20481 transitions. [2021-06-12 21:41:36,129 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 20481 transitions. Word has length 30 [2021-06-12 21:41:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:36,130 INFO L482 AbstractCegarLoop]: Abstraction has 6000 states and 20481 transitions. [2021-06-12 21:41:36,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 20481 transitions. [2021-06-12 21:41:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:36,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:36,136 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:36,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 21:41:36,337 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash -824418271, now seen corresponding path program 32 times [2021-06-12 21:41:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:36,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126382549] [2021-06-12 21:41:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:36,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126382549] [2021-06-12 21:41:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126382549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696415245] [2021-06-12 21:41:36,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:36,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:36,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-12 21:41:36,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:41:36,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:36,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:36,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:46 [2021-06-12 21:41:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:36,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696415245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:36,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:36,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-06-12 21:41:36,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697628491] [2021-06-12 21:41:36,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:41:36,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:41:36,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:41:36,775 INFO L87 Difference]: Start difference. First operand 6000 states and 20481 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:37,612 INFO L93 Difference]: Finished difference Result 6705 states and 22557 transitions. [2021-06-12 21:41:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:41:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:37,621 INFO L225 Difference]: With dead ends: 6705 [2021-06-12 21:41:37,622 INFO L226 Difference]: Without dead ends: 6643 [2021-06-12 21:41:37,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 691.2ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:41:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-06-12 21:41:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6010. [2021-06-12 21:41:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 3.412880678981528) internal successors, (20508), 6009 states have internal predecessors, (20508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 20508 transitions. [2021-06-12 21:41:37,701 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 20508 transitions. Word has length 30 [2021-06-12 21:41:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:37,701 INFO L482 AbstractCegarLoop]: Abstraction has 6010 states and 20508 transitions. [2021-06-12 21:41:37,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 20508 transitions. [2021-06-12 21:41:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:37,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:37,738 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:37,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:37,940 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -767713039, now seen corresponding path program 33 times [2021-06-12 21:41:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129087904] [2021-06-12 21:41:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:38,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:38,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129087904] [2021-06-12 21:41:38,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129087904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:38,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053811904] [2021-06-12 21:41:38,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:41:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:41:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:38,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:38,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:41:38,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:41:38,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:38,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:38,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-06-12 21:41:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:38,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053811904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:38,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:38,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-06-12 21:41:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663312410] [2021-06-12 21:41:38,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:38,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:38,520 INFO L87 Difference]: Start difference. First operand 6010 states and 20508 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:39,856 INFO L93 Difference]: Finished difference Result 6764 states and 22726 transitions. [2021-06-12 21:41:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:41:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:39,864 INFO L225 Difference]: With dead ends: 6764 [2021-06-12 21:41:39,865 INFO L226 Difference]: Without dead ends: 6734 [2021-06-12 21:41:39,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1058.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:41:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-06-12 21:41:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6038. [2021-06-12 21:41:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6037 states have (on average 3.4132847440781844) internal successors, (20606), 6037 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 20606 transitions. [2021-06-12 21:41:39,940 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 20606 transitions. Word has length 30 [2021-06-12 21:41:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:39,940 INFO L482 AbstractCegarLoop]: Abstraction has 6038 states and 20606 transitions. [2021-06-12 21:41:39,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 20606 transitions. [2021-06-12 21:41:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:39,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:39,947 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 21:41:40,148 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 864921772, now seen corresponding path program 38 times [2021-06-12 21:41:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960591301] [2021-06-12 21:41:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:40,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:40,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960591301] [2021-06-12 21:41:40,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960591301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:40,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032352273] [2021-06-12 21:41:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:41:40,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:40,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:40,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 21:41:40,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:40,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:40,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:40,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-12 21:41:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:40,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032352273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:40,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:40,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-12 21:41:40,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961847035] [2021-06-12 21:41:40,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:40,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:40,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:40,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:40,819 INFO L87 Difference]: Start difference. First operand 6038 states and 20606 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:42,569 INFO L93 Difference]: Finished difference Result 7697 states and 25628 transitions. [2021-06-12 21:41:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:41:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:42,580 INFO L225 Difference]: With dead ends: 7697 [2021-06-12 21:41:42,580 INFO L226 Difference]: Without dead ends: 7671 [2021-06-12 21:41:42,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1439.8ms TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:41:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-06-12 21:41:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6056. [2021-06-12 21:41:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 3.4123864574731626) internal successors, (20662), 6055 states have internal predecessors, (20662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 20662 transitions. [2021-06-12 21:41:42,663 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 20662 transitions. Word has length 30 [2021-06-12 21:41:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:42,663 INFO L482 AbstractCegarLoop]: Abstraction has 6056 states and 20662 transitions. [2021-06-12 21:41:42,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 20662 transitions. [2021-06-12 21:41:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:42,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:42,670 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:42,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-12 21:41:42,870 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 39 times [2021-06-12 21:41:42,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:42,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4211607] [2021-06-12 21:41:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:43,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:43,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4211607] [2021-06-12 21:41:43,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4211607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:43,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939067908] [2021-06-12 21:41:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:43,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:41:43,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:43,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:43,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:43,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-12 21:41:43,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:41:43,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:43,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:43,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:158 [2021-06-12 21:41:43,585 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-12 21:41:43,815 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-12 21:41:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:43,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939067908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:43,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:43,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:41:43,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978472100] [2021-06-12 21:41:43,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:43,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:43,954 INFO L87 Difference]: Start difference. First operand 6056 states and 20662 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:45,130 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 21:41:45,386 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 21:41:46,494 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-06-12 21:41:46,689 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 21:41:47,609 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-12 21:41:47,787 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:41:48,018 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 21:41:48,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-12 21:41:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:48,460 INFO L93 Difference]: Finished difference Result 8480 states and 28186 transitions. [2021-06-12 21:41:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 21:41:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:48,473 INFO L225 Difference]: With dead ends: 8480 [2021-06-12 21:41:48,473 INFO L226 Difference]: Without dead ends: 8427 [2021-06-12 21:41:48,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 4129.7ms TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:41:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-06-12 21:41:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 6099. [2021-06-12 21:41:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.4137422105608395) internal successors, (20817), 6098 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 20817 transitions. [2021-06-12 21:41:48,567 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 20817 transitions. Word has length 30 [2021-06-12 21:41:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:48,567 INFO L482 AbstractCegarLoop]: Abstraction has 6099 states and 20817 transitions. [2021-06-12 21:41:48,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 20817 transitions. [2021-06-12 21:41:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:48,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:48,574 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:48,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:48,775 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2040035028, now seen corresponding path program 40 times [2021-06-12 21:41:48,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:48,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874091625] [2021-06-12 21:41:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:49,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874091625] [2021-06-12 21:41:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874091625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360385666] [2021-06-12 21:41:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:49,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:41:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:41:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:49,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:49,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:49,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:49,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:49,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360385666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:49,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:49,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:41:49,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282468804] [2021-06-12 21:41:49,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:41:49,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:41:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:41:49,373 INFO L87 Difference]: Start difference. First operand 6099 states and 20817 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:51,045 INFO L93 Difference]: Finished difference Result 7457 states and 24976 transitions. [2021-06-12 21:41:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:41:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:51,056 INFO L225 Difference]: With dead ends: 7457 [2021-06-12 21:41:51,056 INFO L226 Difference]: Without dead ends: 7438 [2021-06-12 21:41:51,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1447.8ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:41:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-06-12 21:41:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6101. [2021-06-12 21:41:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 3.4137704918032785) internal successors, (20824), 6100 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 20824 transitions. [2021-06-12 21:41:51,155 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 20824 transitions. Word has length 30 [2021-06-12 21:41:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:51,155 INFO L482 AbstractCegarLoop]: Abstraction has 6101 states and 20824 transitions. [2021-06-12 21:41:51,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 20824 transitions. [2021-06-12 21:41:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:51,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:51,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:51,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:51,362 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1418323052, now seen corresponding path program 41 times [2021-06-12 21:41:51,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:51,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435331671] [2021-06-12 21:41:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:51,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:51,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435331671] [2021-06-12 21:41:51,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435331671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:51,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359924147] [2021-06-12 21:41:51,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:51,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:41:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:41:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:51,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:41:51,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:51,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:51,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:51,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:51,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359924147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:51,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:51,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:51,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542440566] [2021-06-12 21:41:51,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:51,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:51,858 INFO L87 Difference]: Start difference. First operand 6101 states and 20824 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:53,176 INFO L93 Difference]: Finished difference Result 9244 states and 30770 transitions. [2021-06-12 21:41:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:41:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:53,188 INFO L225 Difference]: With dead ends: 9244 [2021-06-12 21:41:53,188 INFO L226 Difference]: Without dead ends: 9223 [2021-06-12 21:41:53,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1071.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:41:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-06-12 21:41:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 6163. [2021-06-12 21:41:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 3.4138266796494645) internal successors, (21036), 6162 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 21036 transitions. [2021-06-12 21:41:53,278 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 21036 transitions. Word has length 30 [2021-06-12 21:41:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:53,278 INFO L482 AbstractCegarLoop]: Abstraction has 6163 states and 21036 transitions. [2021-06-12 21:41:53,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 21036 transitions. [2021-06-12 21:41:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:53,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:53,285 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:53,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 21:41:53,485 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1342440280, now seen corresponding path program 42 times [2021-06-12 21:41:53,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:53,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813361381] [2021-06-12 21:41:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:53,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:53,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813361381] [2021-06-12 21:41:53,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813361381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:53,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023315750] [2021-06-12 21:41:53,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:53,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:41:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:53,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:53,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:41:53,992 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:53,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:54,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:54,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:41:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:54,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023315750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:54,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:54,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 21:41:54,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501278640] [2021-06-12 21:41:54,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:54,041 INFO L87 Difference]: Start difference. First operand 6163 states and 21036 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:57,438 INFO L93 Difference]: Finished difference Result 9714 states and 31902 transitions. [2021-06-12 21:41:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 21:41:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:57,451 INFO L225 Difference]: With dead ends: 9714 [2021-06-12 21:41:57,451 INFO L226 Difference]: Without dead ends: 9659 [2021-06-12 21:41:57,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 2746.8ms TimeCoverageRelationStatistics Valid=815, Invalid=6157, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:41:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-06-12 21:41:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 6173. [2021-06-12 21:41:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6172 states have (on average 3.4149384316267013) internal successors, (21077), 6172 states have internal predecessors, (21077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 21077 transitions. [2021-06-12 21:41:57,547 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 21077 transitions. Word has length 30 [2021-06-12 21:41:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:57,547 INFO L482 AbstractCegarLoop]: Abstraction has 6173 states and 21077 transitions. [2021-06-12 21:41:57,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 21077 transitions. [2021-06-12 21:41:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:57,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:57,554 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:57,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:57,755 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1284214256, now seen corresponding path program 43 times [2021-06-12 21:41:57,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:57,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125035689] [2021-06-12 21:41:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:57,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125035689] [2021-06-12 21:41:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125035689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341235788] [2021-06-12 21:41:57,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:41:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:58,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:41:58,151 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:58,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:58,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:58,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:41:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:41:58,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341235788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:58,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:58,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:41:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58264836] [2021-06-12 21:41:58,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:41:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:41:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:41:58,216 INFO L87 Difference]: Start difference. First operand 6173 states and 21077 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:59,450 INFO L93 Difference]: Finished difference Result 9307 states and 30934 transitions. [2021-06-12 21:41:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:41:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:41:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:59,463 INFO L225 Difference]: With dead ends: 9307 [2021-06-12 21:41:59,463 INFO L226 Difference]: Without dead ends: 9230 [2021-06-12 21:41:59,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:41:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-12 21:41:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 6160. [2021-06-12 21:41:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4159766195811008) internal successors, (21039), 6159 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21039 transitions. [2021-06-12 21:41:59,561 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21039 transitions. Word has length 30 [2021-06-12 21:41:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:59,561 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21039 transitions. [2021-06-12 21:41:59,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21039 transitions. [2021-06-12 21:41:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:41:59,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:59,568 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:41:59,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 21:41:59,769 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:59,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1930370840, now seen corresponding path program 44 times [2021-06-12 21:41:59,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:59,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067113681] [2021-06-12 21:41:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:00,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067113681] [2021-06-12 21:42:00,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067113681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771010458] [2021-06-12 21:42:00,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:00,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:00,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:00,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:00,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:42:00,242 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:00,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:00,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:00,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:42:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771010458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:00,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:00,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727694162] [2021-06-12 21:42:00,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:00,318 INFO L87 Difference]: Start difference. First operand 6160 states and 21039 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:03,660 INFO L93 Difference]: Finished difference Result 10757 states and 35501 transitions. [2021-06-12 21:42:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:42:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:03,675 INFO L225 Difference]: With dead ends: 10757 [2021-06-12 21:42:03,675 INFO L226 Difference]: Without dead ends: 10710 [2021-06-12 21:42:03,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2520.6ms TimeCoverageRelationStatistics Valid=765, Invalid=5397, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:42:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-06-12 21:42:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 6165. [2021-06-12 21:42:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 6164 states have (on average 3.416288124594419) internal successors, (21058), 6164 states have internal predecessors, (21058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 21058 transitions. [2021-06-12 21:42:03,780 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 21058 transitions. Word has length 30 [2021-06-12 21:42:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 6165 states and 21058 transitions. [2021-06-12 21:42:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 21058 transitions. [2021-06-12 21:42:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:03,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:03,787 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:03,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:03,987 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1586753244, now seen corresponding path program 45 times [2021-06-12 21:42:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:03,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113879250] [2021-06-12 21:42:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:04,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:04,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113879250] [2021-06-12 21:42:04,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113879250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:04,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236245546] [2021-06-12 21:42:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:04,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:42:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:04,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:04,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:04,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:42:04,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:42:04,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:04,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:04,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-12 21:42:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:04,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236245546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:04,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:04,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 21:42:04,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323622888] [2021-06-12 21:42:04,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:42:04,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:42:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:42:04,661 INFO L87 Difference]: Start difference. First operand 6165 states and 21058 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:08,696 INFO L93 Difference]: Finished difference Result 8909 states and 29416 transitions. [2021-06-12 21:42:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 21:42:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:08,709 INFO L225 Difference]: With dead ends: 8909 [2021-06-12 21:42:08,709 INFO L226 Difference]: Without dead ends: 8853 [2021-06-12 21:42:08,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3184.6ms TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:42:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-12 21:42:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6186. [2021-06-12 21:42:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.4202101859337106) internal successors, (21154), 6185 states have internal predecessors, (21154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 21154 transitions. [2021-06-12 21:42:08,807 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 21154 transitions. Word has length 30 [2021-06-12 21:42:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:08,807 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 21154 transitions. [2021-06-12 21:42:08,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 21154 transitions. [2021-06-12 21:42:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:08,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:08,814 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:09,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 21:42:09,014 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:09,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -181911884, now seen corresponding path program 46 times [2021-06-12 21:42:09,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:09,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110331491] [2021-06-12 21:42:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:09,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:09,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110331491] [2021-06-12 21:42:09,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110331491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:09,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719495146] [2021-06-12 21:42:09,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:09,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:09,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:09,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:09,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:42:09,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:09,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:09,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:09,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:42:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719495146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:09,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:42:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525984196] [2021-06-12 21:42:09,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:42:09,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:42:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:42:09,498 INFO L87 Difference]: Start difference. First operand 6186 states and 21154 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:10,192 INFO L93 Difference]: Finished difference Result 7716 states and 26020 transitions. [2021-06-12 21:42:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:10,203 INFO L225 Difference]: With dead ends: 7716 [2021-06-12 21:42:10,203 INFO L226 Difference]: Without dead ends: 7695 [2021-06-12 21:42:10,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:42:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-12 21:42:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 6196. [2021-06-12 21:42:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.419693301049233) internal successors, (21185), 6195 states have internal predecessors, (21185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21185 transitions. [2021-06-12 21:42:10,285 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21185 transitions. Word has length 30 [2021-06-12 21:42:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:10,285 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21185 transitions. [2021-06-12 21:42:10,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21185 transitions. [2021-06-12 21:42:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:10,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:10,291 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:10,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 21:42:10,502 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1591195952, now seen corresponding path program 47 times [2021-06-12 21:42:10,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:10,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490606722] [2021-06-12 21:42:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:10,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:10,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490606722] [2021-06-12 21:42:10,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490606722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:10,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803426254] [2021-06-12 21:42:10,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:10,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:42:10,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:10,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:10,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 21:42:10,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:42:10,954 INFO L628 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2021-06-12 21:42:10,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:42:10,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:66 [2021-06-12 21:42:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:11,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803426254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:11,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:11,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 21:42:11,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098429467] [2021-06-12 21:42:11,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:42:11,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:11,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:42:11,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:42:11,053 INFO L87 Difference]: Start difference. First operand 6196 states and 21185 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:11,812 INFO L93 Difference]: Finished difference Result 8660 states and 28972 transitions. [2021-06-12 21:42:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:42:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:11,824 INFO L225 Difference]: With dead ends: 8660 [2021-06-12 21:42:11,824 INFO L226 Difference]: Without dead ends: 8610 [2021-06-12 21:42:11,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:42:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-06-12 21:42:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 6247. [2021-06-12 21:42:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 3.420268972142171) internal successors, (21363), 6246 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 21363 transitions. [2021-06-12 21:42:11,965 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 21363 transitions. Word has length 30 [2021-06-12 21:42:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:11,965 INFO L482 AbstractCegarLoop]: Abstraction has 6247 states and 21363 transitions. [2021-06-12 21:42:11,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 21363 transitions. [2021-06-12 21:42:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:11,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:11,972 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:12,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 21:42:12,188 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1439678622, now seen corresponding path program 48 times [2021-06-12 21:42:12,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:12,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459497914] [2021-06-12 21:42:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:12,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459497914] [2021-06-12 21:42:12,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459497914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700434013] [2021-06-12 21:42:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:12,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:42:12,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:12,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:12,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:12,614 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:12,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:12,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:12,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:42:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:12,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700434013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:12,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:12,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:12,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616286997] [2021-06-12 21:42:12,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:12,685 INFO L87 Difference]: Start difference. First operand 6247 states and 21363 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:13,192 INFO L93 Difference]: Finished difference Result 7945 states and 26808 transitions. [2021-06-12 21:42:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:42:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:13,203 INFO L225 Difference]: With dead ends: 7945 [2021-06-12 21:42:13,203 INFO L226 Difference]: Without dead ends: 7920 [2021-06-12 21:42:13,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:42:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-06-12 21:42:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 6228. [2021-06-12 21:42:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.421069535892083) internal successors, (21303), 6227 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21303 transitions. [2021-06-12 21:42:13,290 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21303 transitions. Word has length 30 [2021-06-12 21:42:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:13,291 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21303 transitions. [2021-06-12 21:42:13,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21303 transitions. [2021-06-12 21:42:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:13,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:13,297 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:13,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:13,498 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:13,498 INFO L82 PathProgramCache]: Analyzing trace with hash 603346348, now seen corresponding path program 49 times [2021-06-12 21:42:13,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:13,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502508298] [2021-06-12 21:42:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:13,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502508298] [2021-06-12 21:42:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502508298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044864290] [2021-06-12 21:42:13,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:13,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:13,930 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:13,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:13,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:13,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:42:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044864290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:14,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:14,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61971049] [2021-06-12 21:42:14,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:14,041 INFO L87 Difference]: Start difference. First operand 6228 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:14,815 INFO L93 Difference]: Finished difference Result 8032 states and 27059 transitions. [2021-06-12 21:42:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:42:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:14,827 INFO L225 Difference]: With dead ends: 8032 [2021-06-12 21:42:14,827 INFO L226 Difference]: Without dead ends: 8007 [2021-06-12 21:42:14,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:42:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-06-12 21:42:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 6224. [2021-06-12 21:42:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.421018801221276) internal successors, (21289), 6223 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21289 transitions. [2021-06-12 21:42:14,914 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21289 transitions. Word has length 30 [2021-06-12 21:42:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:14,914 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21289 transitions. [2021-06-12 21:42:14,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21289 transitions. [2021-06-12 21:42:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:14,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:14,920 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:15,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 21:42:15,121 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 50 times [2021-06-12 21:42:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:15,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635905334] [2021-06-12 21:42:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:15,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635905334] [2021-06-12 21:42:15,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635905334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286853140] [2021-06-12 21:42:15,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:15,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:15,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:15,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:15,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:15,519 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:15,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:15,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:15,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:42:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:15,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286853140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:15,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:15,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:42:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130144239] [2021-06-12 21:42:15,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:42:15,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:42:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:42:15,581 INFO L87 Difference]: Start difference. First operand 6224 states and 21289 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:17,263 INFO L93 Difference]: Finished difference Result 8292 states and 27808 transitions. [2021-06-12 21:42:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:42:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:17,275 INFO L225 Difference]: With dead ends: 8292 [2021-06-12 21:42:17,275 INFO L226 Difference]: Without dead ends: 8267 [2021-06-12 21:42:17,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1386.6ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:42:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-06-12 21:42:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6232. [2021-06-12 21:42:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4204782538918312) internal successors, (21313), 6231 states have internal predecessors, (21313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21313 transitions. [2021-06-12 21:42:17,373 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21313 transitions. Word has length 30 [2021-06-12 21:42:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:17,373 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21313 transitions. [2021-06-12 21:42:17,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21313 transitions. [2021-06-12 21:42:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:17,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:17,380 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:17,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:17,581 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 51 times [2021-06-12 21:42:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715605831] [2021-06-12 21:42:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:17,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715605831] [2021-06-12 21:42:17,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715605831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745626789] [2021-06-12 21:42:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:17,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:42:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:17,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:17,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:17,965 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:17,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:17,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:17,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:42:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:18,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745626789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:18,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:18,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:42:18,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222122857] [2021-06-12 21:42:18,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:42:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:42:18,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:42:18,030 INFO L87 Difference]: Start difference. First operand 6232 states and 21313 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:19,946 INFO L93 Difference]: Finished difference Result 8261 states and 27817 transitions. [2021-06-12 21:42:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 21:42:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:19,958 INFO L225 Difference]: With dead ends: 8261 [2021-06-12 21:42:19,958 INFO L226 Difference]: Without dead ends: 8230 [2021-06-12 21:42:19,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1475.9ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:42:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-12 21:42:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 6240. [2021-06-12 21:42:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.4199390928033337) internal successors, (21337), 6239 states have internal predecessors, (21337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21337 transitions. [2021-06-12 21:42:20,047 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21337 transitions. Word has length 30 [2021-06-12 21:42:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:20,047 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21337 transitions. [2021-06-12 21:42:20,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21337 transitions. [2021-06-12 21:42:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:20,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:20,054 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:20,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 21:42:20,254 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1158696, now seen corresponding path program 52 times [2021-06-12 21:42:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:20,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244382250] [2021-06-12 21:42:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:20,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244382250] [2021-06-12 21:42:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244382250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:20,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915995833] [2021-06-12 21:42:20,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:20,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:20,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:20,683 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:20,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:20,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:20,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:42:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915995833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:20,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:20,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62106984] [2021-06-12 21:42:20,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:20,753 INFO L87 Difference]: Start difference. First operand 6240 states and 21337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:21,537 INFO L93 Difference]: Finished difference Result 8082 states and 27204 transitions. [2021-06-12 21:42:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:42:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:21,549 INFO L225 Difference]: With dead ends: 8082 [2021-06-12 21:42:21,549 INFO L226 Difference]: Without dead ends: 8057 [2021-06-12 21:42:21,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:42:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-06-12 21:42:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 6248. [2021-06-12 21:42:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.4194013126300624) internal successors, (21361), 6247 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 21361 transitions. [2021-06-12 21:42:21,638 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 21361 transitions. Word has length 30 [2021-06-12 21:42:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:21,638 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 21361 transitions. [2021-06-12 21:42:21,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 21361 transitions. [2021-06-12 21:42:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:21,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:21,645 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:21,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:21,846 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:21,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 22 times [2021-06-12 21:42:21,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:21,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187177953] [2021-06-12 21:42:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:22,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:22,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187177953] [2021-06-12 21:42:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187177953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:22,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028583310] [2021-06-12 21:42:22,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:22,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:22,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:42:22,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:22,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:42:22,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:22,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:22,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:22,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:42:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028583310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:22,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:22,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-12 21:42:22,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350901185] [2021-06-12 21:42:22,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:42:22,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:42:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:42:22,440 INFO L87 Difference]: Start difference. First operand 6248 states and 21361 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:24,518 INFO L93 Difference]: Finished difference Result 7816 states and 26141 transitions. [2021-06-12 21:42:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:42:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:24,528 INFO L225 Difference]: With dead ends: 7816 [2021-06-12 21:42:24,528 INFO L226 Difference]: Without dead ends: 7790 [2021-06-12 21:42:24,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1796.8ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:42:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-06-12 21:42:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6242. [2021-06-12 21:42:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 3.4202852107034127) internal successors, (21346), 6241 states have internal predecessors, (21346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 21346 transitions. [2021-06-12 21:42:24,614 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 21346 transitions. Word has length 30 [2021-06-12 21:42:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:24,614 INFO L482 AbstractCegarLoop]: Abstraction has 6242 states and 21346 transitions. [2021-06-12 21:42:24,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 21346 transitions. [2021-06-12 21:42:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:24,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:24,621 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:24,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 21:42:24,822 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 23 times [2021-06-12 21:42:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:24,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675445628] [2021-06-12 21:42:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:25,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:25,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675445628] [2021-06-12 21:42:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675445628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:25,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997027228] [2021-06-12 21:42:25,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:25,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:42:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:42:25,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:25,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:25,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:25,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:42:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:25,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997027228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:25,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:25,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:42:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642381527] [2021-06-12 21:42:25,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:25,342 INFO L87 Difference]: Start difference. First operand 6242 states and 21346 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:27,036 INFO L93 Difference]: Finished difference Result 7732 states and 25924 transitions. [2021-06-12 21:42:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:42:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:27,046 INFO L225 Difference]: With dead ends: 7732 [2021-06-12 21:42:27,047 INFO L226 Difference]: Without dead ends: 7706 [2021-06-12 21:42:27,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1483.2ms TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:42:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-06-12 21:42:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6254. [2021-06-12 21:42:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6253 states have (on average 3.418519110826803) internal successors, (21376), 6253 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 21376 transitions. [2021-06-12 21:42:27,131 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 21376 transitions. Word has length 30 [2021-06-12 21:42:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:27,131 INFO L482 AbstractCegarLoop]: Abstraction has 6254 states and 21376 transitions. [2021-06-12 21:42:27,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 21376 transitions. [2021-06-12 21:42:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:27,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:27,139 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:27,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 21:42:27,341 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 24 times [2021-06-12 21:42:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425652668] [2021-06-12 21:42:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:27,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425652668] [2021-06-12 21:42:27,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425652668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297234181] [2021-06-12 21:42:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:27,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:42:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:42:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:27,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:27,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-06-12 21:42:27,852 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:42:27,866 INFO L628 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2021-06-12 21:42:27,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:27,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:28 [2021-06-12 21:42:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297234181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:27,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:27,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:42:27,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090371507] [2021-06-12 21:42:27,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:42:27,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:42:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:42:27,937 INFO L87 Difference]: Start difference. First operand 6254 states and 21376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:30,200 INFO L93 Difference]: Finished difference Result 8414 states and 28160 transitions. [2021-06-12 21:42:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:42:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:30,212 INFO L225 Difference]: With dead ends: 8414 [2021-06-12 21:42:30,212 INFO L226 Difference]: Without dead ends: 8388 [2021-06-12 21:42:30,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1831.9ms TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:42:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-06-12 21:42:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 6316. [2021-06-12 21:42:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 3.4134600158353128) internal successors, (21556), 6315 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 21556 transitions. [2021-06-12 21:42:30,303 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 21556 transitions. Word has length 30 [2021-06-12 21:42:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:30,303 INFO L482 AbstractCegarLoop]: Abstraction has 6316 states and 21556 transitions. [2021-06-12 21:42:30,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 21556 transitions. [2021-06-12 21:42:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:30,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:30,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:30,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 21:42:30,511 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 25 times [2021-06-12 21:42:30,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:30,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045677139] [2021-06-12 21:42:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:30,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045677139] [2021-06-12 21:42:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045677139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420985699] [2021-06-12 21:42:30,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:31,110 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 21:42:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-12 21:42:31,112 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:31,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:31,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:31,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-12 21:42:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:31,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420985699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:31,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:31,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:42:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871075701] [2021-06-12 21:42:31,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:42:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:42:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:42:31,167 INFO L87 Difference]: Start difference. First operand 6316 states and 21556 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:33,218 INFO L93 Difference]: Finished difference Result 7885 states and 26351 transitions. [2021-06-12 21:42:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:42:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:33,228 INFO L225 Difference]: With dead ends: 7885 [2021-06-12 21:42:33,228 INFO L226 Difference]: Without dead ends: 7859 [2021-06-12 21:42:33,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1715.4ms TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:42:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-06-12 21:42:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 6324. [2021-06-12 21:42:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 3.4123042859402184) internal successors, (21576), 6323 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 21576 transitions. [2021-06-12 21:42:33,315 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 21576 transitions. Word has length 30 [2021-06-12 21:42:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:33,315 INFO L482 AbstractCegarLoop]: Abstraction has 6324 states and 21576 transitions. [2021-06-12 21:42:33,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 21576 transitions. [2021-06-12 21:42:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:33,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:33,322 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:33,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:33,523 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2139112310, now seen corresponding path program 53 times [2021-06-12 21:42:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:33,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23105172] [2021-06-12 21:42:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:33,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:33,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23105172] [2021-06-12 21:42:33,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23105172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:33,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793164729] [2021-06-12 21:42:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:33,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:42:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:33,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:33,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:42:33,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:34,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:34,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-12 21:42:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:34,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793164729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:34,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:34,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-12 21:42:34,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218654181] [2021-06-12 21:42:34,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:42:34,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:34,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:42:34,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:42:34,025 INFO L87 Difference]: Start difference. First operand 6324 states and 21576 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:35,644 INFO L93 Difference]: Finished difference Result 7989 states and 26816 transitions. [2021-06-12 21:42:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:42:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:35,655 INFO L225 Difference]: With dead ends: 7989 [2021-06-12 21:42:35,656 INFO L226 Difference]: Without dead ends: 7968 [2021-06-12 21:42:35,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1402.5ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:42:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-06-12 21:42:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 6356. [2021-06-12 21:42:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 3.411644374508261) internal successors, (21681), 6355 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 21681 transitions. [2021-06-12 21:42:35,740 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 21681 transitions. Word has length 30 [2021-06-12 21:42:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:35,740 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 21681 transitions. [2021-06-12 21:42:35,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 21681 transitions. [2021-06-12 21:42:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:35,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:35,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:35,948 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1940768934, now seen corresponding path program 54 times [2021-06-12 21:42:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409591162] [2021-06-12 21:42:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:36,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:36,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409591162] [2021-06-12 21:42:36,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409591162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:36,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897000883] [2021-06-12 21:42:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:36,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:42:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:36,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:36,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:36,380 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:36,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:36,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:36,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:42:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:36,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897000883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:36,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:36,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:42:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165699576] [2021-06-12 21:42:36,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:42:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:42:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:42:36,430 INFO L87 Difference]: Start difference. First operand 6356 states and 21681 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:38,360 INFO L93 Difference]: Finished difference Result 9388 states and 31190 transitions. [2021-06-12 21:42:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:42:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:38,373 INFO L225 Difference]: With dead ends: 9388 [2021-06-12 21:42:38,374 INFO L226 Difference]: Without dead ends: 9344 [2021-06-12 21:42:38,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1598.9ms TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:42:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-06-12 21:42:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6373. [2021-06-12 21:42:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.4110169491525424) internal successors, (21735), 6372 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21735 transitions. [2021-06-12 21:42:38,481 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21735 transitions. Word has length 30 [2021-06-12 21:42:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:38,481 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21735 transitions. [2021-06-12 21:42:38,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21735 transitions. [2021-06-12 21:42:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:38,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:38,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:38,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:38,690 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1538373058, now seen corresponding path program 55 times [2021-06-12 21:42:38,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:38,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353583704] [2021-06-12 21:42:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:38,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353583704] [2021-06-12 21:42:38,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353583704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220463921] [2021-06-12 21:42:38,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:39,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:39,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:42:39,179 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:39,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:39,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:39,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:42:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220463921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669082875] [2021-06-12 21:42:39,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:39,257 INFO L87 Difference]: Start difference. First operand 6373 states and 21735 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:40,758 INFO L93 Difference]: Finished difference Result 8603 states and 28835 transitions. [2021-06-12 21:42:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:42:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:40,770 INFO L225 Difference]: With dead ends: 8603 [2021-06-12 21:42:40,770 INFO L226 Difference]: Without dead ends: 8553 [2021-06-12 21:42:40,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1242.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:42:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2021-06-12 21:42:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 6375. [2021-06-12 21:42:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.411201757138375) internal successors, (21743), 6374 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21743 transitions. [2021-06-12 21:42:40,900 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21743 transitions. Word has length 30 [2021-06-12 21:42:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:40,900 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21743 transitions. [2021-06-12 21:42:40,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21743 transitions. [2021-06-12 21:42:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:40,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:40,907 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:41,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 21:42:41,108 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1512950702, now seen corresponding path program 56 times [2021-06-12 21:42:41,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:41,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109737617] [2021-06-12 21:42:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:41,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109737617] [2021-06-12 21:42:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109737617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:41,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093198721] [2021-06-12 21:42:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:41,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:41,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:41,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:41,564 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:41,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:41,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:41,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:42:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:41,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093198721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:41,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:41,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:42:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745625739] [2021-06-12 21:42:41,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:42:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:42:41,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:42:41,614 INFO L87 Difference]: Start difference. First operand 6375 states and 21743 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:42,535 INFO L93 Difference]: Finished difference Result 8550 states and 28635 transitions. [2021-06-12 21:42:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:42:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:42,546 INFO L225 Difference]: With dead ends: 8550 [2021-06-12 21:42:42,547 INFO L226 Difference]: Without dead ends: 8525 [2021-06-12 21:42:42,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:42:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-12 21:42:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6366. [2021-06-12 21:42:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 3.4120974076983503) internal successors, (21718), 6365 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 21718 transitions. [2021-06-12 21:42:42,645 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 21718 transitions. Word has length 30 [2021-06-12 21:42:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:42,645 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 21718 transitions. [2021-06-12 21:42:42,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 21718 transitions. [2021-06-12 21:42:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:42,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:42,653 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:42,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 21:42:42,853 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1366348758, now seen corresponding path program 57 times [2021-06-12 21:42:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010049189] [2021-06-12 21:42:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:43,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010049189] [2021-06-12 21:42:43,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010049189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265829230] [2021-06-12 21:42:43,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:43,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:42:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:42:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:43,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:43,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-12 21:42:43,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:42:43,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:43,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:43,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-06-12 21:42:43,552 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-12 21:42:43,775 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 21:42:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265829230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:43,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:43,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 21:42:43,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798979361] [2021-06-12 21:42:43,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:42:43,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:42:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:42:43,910 INFO L87 Difference]: Start difference. First operand 6366 states and 21718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:45,275 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-12 21:42:45,432 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-06-12 21:42:45,758 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-12 21:42:45,981 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 21:42:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:46,258 INFO L93 Difference]: Finished difference Result 8916 states and 29779 transitions. [2021-06-12 21:42:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:42:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:46,272 INFO L225 Difference]: With dead ends: 8916 [2021-06-12 21:42:46,272 INFO L226 Difference]: Without dead ends: 8853 [2021-06-12 21:42:46,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2240.0ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:42:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-12 21:42:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6375. [2021-06-12 21:42:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.41214308126765) internal successors, (21749), 6374 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21749 transitions. [2021-06-12 21:42:46,370 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21749 transitions. Word has length 30 [2021-06-12 21:42:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:46,370 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21749 transitions. [2021-06-12 21:42:46,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21749 transitions. [2021-06-12 21:42:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:46,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:46,377 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:46,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:46,579 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:46,579 INFO L82 PathProgramCache]: Analyzing trace with hash 764161106, now seen corresponding path program 58 times [2021-06-12 21:42:46,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:46,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204724702] [2021-06-12 21:42:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:46,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:46,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204724702] [2021-06-12 21:42:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204724702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:46,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26077241] [2021-06-12 21:42:46,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:46,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:47,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:47,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:42:47,048 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:47,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:47,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:47,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:42:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:47,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26077241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:47,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:47,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 21:42:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761857337] [2021-06-12 21:42:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:42:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:42:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:42:47,121 INFO L87 Difference]: Start difference. First operand 6375 states and 21749 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:48,087 INFO L93 Difference]: Finished difference Result 8258 states and 27729 transitions. [2021-06-12 21:42:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:42:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:48,099 INFO L225 Difference]: With dead ends: 8258 [2021-06-12 21:42:48,099 INFO L226 Difference]: Without dead ends: 8233 [2021-06-12 21:42:48,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:42:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-06-12 21:42:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 6373. [2021-06-12 21:42:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.412272441933459) internal successors, (21743), 6372 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21743 transitions. [2021-06-12 21:42:48,191 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21743 transitions. Word has length 30 [2021-06-12 21:42:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:48,191 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21743 transitions. [2021-06-12 21:42:48,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21743 transitions. [2021-06-12 21:42:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:48,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:48,199 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:48,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:48,409 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 59 times [2021-06-12 21:42:48,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:48,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316474584] [2021-06-12 21:42:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:48,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316474584] [2021-06-12 21:42:48,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316474584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26907158] [2021-06-12 21:42:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:48,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:42:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:42:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:42:48,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:48,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:48,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:48,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-12 21:42:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:48,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26907158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:48,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:48,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-12 21:42:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634914805] [2021-06-12 21:42:48,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:42:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:42:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:42:48,945 INFO L87 Difference]: Start difference. First operand 6373 states and 21743 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:51,407 INFO L93 Difference]: Finished difference Result 8585 states and 28565 transitions. [2021-06-12 21:42:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 21:42:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:51,419 INFO L225 Difference]: With dead ends: 8585 [2021-06-12 21:42:51,419 INFO L226 Difference]: Without dead ends: 8570 [2021-06-12 21:42:51,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1941.5ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:42:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-12 21:42:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6394. [2021-06-12 21:42:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 3.4135773502268107) internal successors, (21823), 6393 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 21823 transitions. [2021-06-12 21:42:51,523 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 21823 transitions. Word has length 30 [2021-06-12 21:42:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:51,523 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 21823 transitions. [2021-06-12 21:42:51,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 21823 transitions. [2021-06-12 21:42:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:51,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:51,531 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:51,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:51,731 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 26 times [2021-06-12 21:42:51,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:51,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396829635] [2021-06-12 21:42:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:52,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396829635] [2021-06-12 21:42:52,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396829635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44311826] [2021-06-12 21:42:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:52,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:42:52,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:42:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:52,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:52,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:42:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:42:52,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:52,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:52,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:52,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:42:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:52,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44311826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:52,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:52,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:42:52,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704220241] [2021-06-12 21:42:52,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:42:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:42:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:42:52,450 INFO L87 Difference]: Start difference. First operand 6394 states and 21823 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:57,762 INFO L93 Difference]: Finished difference Result 8768 states and 28896 transitions. [2021-06-12 21:42:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 21:42:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:42:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:57,775 INFO L225 Difference]: With dead ends: 8768 [2021-06-12 21:42:57,775 INFO L226 Difference]: Without dead ends: 8735 [2021-06-12 21:42:57,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 4283.5ms TimeCoverageRelationStatistics Valid=1406, Invalid=8694, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 21:42:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-06-12 21:42:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 6450. [2021-06-12 21:42:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.4129322375562103) internal successors, (22010), 6449 states have internal predecessors, (22010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 22010 transitions. [2021-06-12 21:42:57,884 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 22010 transitions. Word has length 30 [2021-06-12 21:42:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:57,884 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 22010 transitions. [2021-06-12 21:42:57,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 22010 transitions. [2021-06-12 21:42:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:42:57,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:57,891 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:42:58,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:58,092 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 27 times [2021-06-12 21:42:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:58,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240940273] [2021-06-12 21:42:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:58,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:58,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240940273] [2021-06-12 21:42:58,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240940273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:58,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253295287] [2021-06-12 21:42:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:58,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:42:58,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:42:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:58,648 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:42:58,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 78 [2021-06-12 21:42:58,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:58,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:58,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:58,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-06-12 21:42:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:58,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253295287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:58,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:58,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:42:58,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789641636] [2021-06-12 21:42:58,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:42:58,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:42:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:42:58,744 INFO L87 Difference]: Start difference. First operand 6450 states and 22010 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:59,930 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:43:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:01,632 INFO L93 Difference]: Finished difference Result 10387 states and 34070 transitions. [2021-06-12 21:43:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:43:01,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:01,646 INFO L225 Difference]: With dead ends: 10387 [2021-06-12 21:43:01,646 INFO L226 Difference]: Without dead ends: 10372 [2021-06-12 21:43:01,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2390.2ms TimeCoverageRelationStatistics Valid=647, Invalid=4465, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:43:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-06-12 21:43:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6469. [2021-06-12 21:43:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6468 states have (on average 3.41017316017316) internal successors, (22057), 6468 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 22057 transitions. [2021-06-12 21:43:01,754 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 22057 transitions. Word has length 30 [2021-06-12 21:43:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:01,755 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 22057 transitions. [2021-06-12 21:43:01,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 22057 transitions. [2021-06-12 21:43:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:01,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:01,762 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:01,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:01,962 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1869142242, now seen corresponding path program 60 times [2021-06-12 21:43:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246147743] [2021-06-12 21:43:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:02,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:02,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246147743] [2021-06-12 21:43:02,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246147743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:02,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616551485] [2021-06-12 21:43:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:02,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:43:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:43:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:02,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:02,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:43:02,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:43:02,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:02,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:02,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:142 [2021-06-12 21:43:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:02,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616551485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:02,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:02,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 21:43:02,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504224684] [2021-06-12 21:43:02,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:43:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:43:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:43:02,688 INFO L87 Difference]: Start difference. First operand 6469 states and 22057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:04,693 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 21:43:04,908 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-12 21:43:05,130 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-12 21:43:05,288 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-12 21:43:05,816 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-12 21:43:06,990 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-12 21:43:07,114 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-12 21:43:07,493 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 21:43:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:09,027 INFO L93 Difference]: Finished difference Result 9384 states and 30854 transitions. [2021-06-12 21:43:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 21:43:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:09,040 INFO L225 Difference]: With dead ends: 9384 [2021-06-12 21:43:09,040 INFO L226 Difference]: Without dead ends: 9343 [2021-06-12 21:43:09,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 5599.7ms TimeCoverageRelationStatistics Valid=1325, Invalid=9181, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 21:43:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-06-12 21:43:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 6512. [2021-06-12 21:43:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 3.412225464598372) internal successors, (22217), 6511 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 22217 transitions. [2021-06-12 21:43:09,179 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 22217 transitions. Word has length 30 [2021-06-12 21:43:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:09,179 INFO L482 AbstractCegarLoop]: Abstraction has 6512 states and 22217 transitions. [2021-06-12 21:43:09,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 22217 transitions. [2021-06-12 21:43:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:09,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:09,187 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:09,388 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -257494774, now seen corresponding path program 61 times [2021-06-12 21:43:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:09,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079456862] [2021-06-12 21:43:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:09,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079456862] [2021-06-12 21:43:09,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079456862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117639959] [2021-06-12 21:43:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:09,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:09,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:43:09,851 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:43:09,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:09,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:09,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:43:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:09,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117639959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:09,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:09,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:43:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885902093] [2021-06-12 21:43:09,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:43:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:43:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:43:09,897 INFO L87 Difference]: Start difference. First operand 6512 states and 22217 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:13,896 INFO L93 Difference]: Finished difference Result 9850 states and 32506 transitions. [2021-06-12 21:43:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 21:43:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:13,909 INFO L225 Difference]: With dead ends: 9850 [2021-06-12 21:43:13,910 INFO L226 Difference]: Without dead ends: 9812 [2021-06-12 21:43:13,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3197.5ms TimeCoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 21:43:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-06-12 21:43:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6527. [2021-06-12 21:43:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 3.4121973643885997) internal successors, (22268), 6526 states have internal predecessors, (22268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 22268 transitions. [2021-06-12 21:43:14,009 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 22268 transitions. Word has length 30 [2021-06-12 21:43:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:14,009 INFO L482 AbstractCegarLoop]: Abstraction has 6527 states and 22268 transitions. [2021-06-12 21:43:14,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 22268 transitions. [2021-06-12 21:43:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:14,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:14,016 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:14,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 21:43:14,217 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 28 times [2021-06-12 21:43:14,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:14,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082930100] [2021-06-12 21:43:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:14,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082930100] [2021-06-12 21:43:14,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082930100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692244019] [2021-06-12 21:43:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:14,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:43:14,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:14,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:43:14,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:14,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:14,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:14,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:43:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:14,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692244019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:14,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:43:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011529436] [2021-06-12 21:43:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:43:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:43:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:43:14,700 INFO L87 Difference]: Start difference. First operand 6527 states and 22268 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:17,495 INFO L93 Difference]: Finished difference Result 10842 states and 35758 transitions. [2021-06-12 21:43:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:43:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:17,511 INFO L225 Difference]: With dead ends: 10842 [2021-06-12 21:43:17,511 INFO L226 Difference]: Without dead ends: 10821 [2021-06-12 21:43:17,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2173.1ms TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:43:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2021-06-12 21:43:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 6634. [2021-06-12 21:43:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 3.4168551183476557) internal successors, (22664), 6633 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 22664 transitions. [2021-06-12 21:43:17,626 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 22664 transitions. Word has length 30 [2021-06-12 21:43:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:17,626 INFO L482 AbstractCegarLoop]: Abstraction has 6634 states and 22664 transitions. [2021-06-12 21:43:17,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 22664 transitions. [2021-06-12 21:43:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:17,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:17,633 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:17,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:17,834 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 241234517, now seen corresponding path program 29 times [2021-06-12 21:43:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:17,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278797327] [2021-06-12 21:43:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:18,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278797327] [2021-06-12 21:43:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278797327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255689468] [2021-06-12 21:43:18,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:18,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:43:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:18,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:18,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-12 21:43:18,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:43:18,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:18,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:18,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-12 21:43:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:18,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255689468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:18,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:18,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:43:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865714676] [2021-06-12 21:43:18,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:43:18,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:43:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:43:18,361 INFO L87 Difference]: Start difference. First operand 6634 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:19,415 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-12 21:43:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:22,329 INFO L93 Difference]: Finished difference Result 11958 states and 39090 transitions. [2021-06-12 21:43:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 21:43:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:22,347 INFO L225 Difference]: With dead ends: 11958 [2021-06-12 21:43:22,347 INFO L226 Difference]: Without dead ends: 11901 [2021-06-12 21:43:22,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 3263.7ms TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 21:43:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-06-12 21:43:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 6665. [2021-06-12 21:43:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.4191176470588234) internal successors, (22785), 6664 states have internal predecessors, (22785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 22785 transitions. [2021-06-12 21:43:22,494 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 22785 transitions. Word has length 30 [2021-06-12 21:43:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:22,494 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 22785 transitions. [2021-06-12 21:43:22,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 22785 transitions. [2021-06-12 21:43:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:22,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:22,502 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:22,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-12 21:43:22,702 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash -49932476, now seen corresponding path program 62 times [2021-06-12 21:43:22,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:22,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795795399] [2021-06-12 21:43:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795795399] [2021-06-12 21:43:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795795399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411084337] [2021-06-12 21:43:22,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:22,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:43:22,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:43:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:23,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:43:23,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:43:23,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:23,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:23,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:127 [2021-06-12 21:43:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411084337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:23,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 21:43:23,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600768376] [2021-06-12 21:43:23,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:43:23,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:23,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:43:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:43:23,318 INFO L87 Difference]: Start difference. First operand 6665 states and 22785 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:26,821 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 21:43:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:28,263 INFO L93 Difference]: Finished difference Result 9555 states and 31508 transitions. [2021-06-12 21:43:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 21:43:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:28,277 INFO L225 Difference]: With dead ends: 9555 [2021-06-12 21:43:28,277 INFO L226 Difference]: Without dead ends: 9497 [2021-06-12 21:43:28,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3915.9ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 21:43:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-12 21:43:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 6661. [2021-06-12 21:43:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 3.4181681681681684) internal successors, (22765), 6660 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 22765 transitions. [2021-06-12 21:43:28,385 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 22765 transitions. Word has length 30 [2021-06-12 21:43:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:28,385 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 22765 transitions. [2021-06-12 21:43:28,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 22765 transitions. [2021-06-12 21:43:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:28,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:28,393 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:28,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 21:43:28,609 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1734813122, now seen corresponding path program 63 times [2021-06-12 21:43:28,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:28,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917270004] [2021-06-12 21:43:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:28,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917270004] [2021-06-12 21:43:28,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917270004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409746540] [2021-06-12 21:43:28,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:43:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:43:28,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:29,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:29,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:43:29,032 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:43:29,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:29,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:29,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:43:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:29,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409746540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:29,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:29,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:43:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423650255] [2021-06-12 21:43:29,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:43:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:43:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:43:29,095 INFO L87 Difference]: Start difference. First operand 6661 states and 22765 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:32,108 INFO L93 Difference]: Finished difference Result 9025 states and 30264 transitions. [2021-06-12 21:43:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 21:43:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:32,120 INFO L225 Difference]: With dead ends: 9025 [2021-06-12 21:43:32,120 INFO L226 Difference]: Without dead ends: 9000 [2021-06-12 21:43:32,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2446.5ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:43:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-12 21:43:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6636. [2021-06-12 21:43:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.417633760361718) internal successors, (22676), 6635 states have internal predecessors, (22676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 22676 transitions. [2021-06-12 21:43:32,223 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 22676 transitions. Word has length 30 [2021-06-12 21:43:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:32,224 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 22676 transitions. [2021-06-12 21:43:32,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 22676 transitions. [2021-06-12 21:43:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:32,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:32,232 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:32,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:32,432 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1517125215, now seen corresponding path program 30 times [2021-06-12 21:43:32,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:32,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716494983] [2021-06-12 21:43:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:32,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716494983] [2021-06-12 21:43:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716494983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387362909] [2021-06-12 21:43:32,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:32,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:43:32,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:43:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:32,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:32,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-12 21:43:32,999 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:43:33,018 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-12 21:43:33,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:33,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-12 21:43:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:33,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387362909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:33,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:33,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:43:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780750998] [2021-06-12 21:43:33,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:43:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:43:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:43:33,082 INFO L87 Difference]: Start difference. First operand 6636 states and 22676 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:36,952 INFO L93 Difference]: Finished difference Result 9140 states and 30189 transitions. [2021-06-12 21:43:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 21:43:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:36,966 INFO L225 Difference]: With dead ends: 9140 [2021-06-12 21:43:36,966 INFO L226 Difference]: Without dead ends: 9091 [2021-06-12 21:43:36,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3078.0ms TimeCoverageRelationStatistics Valid=953, Invalid=6529, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:43:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-06-12 21:43:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 6597. [2021-06-12 21:43:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 6596 states have (on average 3.4181322013341418) internal successors, (22546), 6596 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 22546 transitions. [2021-06-12 21:43:37,067 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 22546 transitions. Word has length 30 [2021-06-12 21:43:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:37,067 INFO L482 AbstractCegarLoop]: Abstraction has 6597 states and 22546 transitions. [2021-06-12 21:43:37,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 22546 transitions. [2021-06-12 21:43:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:37,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:37,074 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:37,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:37,275 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1193558822, now seen corresponding path program 64 times [2021-06-12 21:43:37,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:37,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317967639] [2021-06-12 21:43:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:37,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317967639] [2021-06-12 21:43:37,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317967639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063003289] [2021-06-12 21:43:37,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:37,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:43:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:37,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:37,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:43:37,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:37,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:37,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:37,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:43:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:37,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063003289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:37,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:37,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:43:37,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601419973] [2021-06-12 21:43:37,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:43:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:37,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:43:37,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:43:37,825 INFO L87 Difference]: Start difference. First operand 6597 states and 22546 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:40,478 INFO L93 Difference]: Finished difference Result 8362 states and 28087 transitions. [2021-06-12 21:43:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:43:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:40,491 INFO L225 Difference]: With dead ends: 8362 [2021-06-12 21:43:40,491 INFO L226 Difference]: Without dead ends: 8347 [2021-06-12 21:43:40,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2253.8ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:43:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2021-06-12 21:43:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 6603. [2021-06-12 21:43:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 3.4180551348076342) internal successors, (22566), 6602 states have internal predecessors, (22566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 22566 transitions. [2021-06-12 21:43:40,586 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 22566 transitions. Word has length 30 [2021-06-12 21:43:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:40,587 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 22566 transitions. [2021-06-12 21:43:40,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 22566 transitions. [2021-06-12 21:43:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:40,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:40,594 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:40,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 21:43:40,795 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 611989314, now seen corresponding path program 65 times [2021-06-12 21:43:40,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:40,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449416667] [2021-06-12 21:43:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449416667] [2021-06-12 21:43:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449416667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472027610] [2021-06-12 21:43:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:41,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:43:41,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:43:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:41,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:43:41,192 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:43:41,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:41,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:41,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:43:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:41,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472027610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:41,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:41,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:43:41,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779914896] [2021-06-12 21:43:41,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:43:41,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:43:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:43:41,254 INFO L87 Difference]: Start difference. First operand 6603 states and 22566 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:44,862 INFO L93 Difference]: Finished difference Result 9359 states and 31301 transitions. [2021-06-12 21:43:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 21:43:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:44,876 INFO L225 Difference]: With dead ends: 9359 [2021-06-12 21:43:44,876 INFO L226 Difference]: Without dead ends: 9312 [2021-06-12 21:43:44,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 2910.9ms TimeCoverageRelationStatistics Valid=790, Invalid=5372, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:43:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-06-12 21:43:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 6619. [2021-06-12 21:43:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 3.4177999395587793) internal successors, (22619), 6618 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 22619 transitions. [2021-06-12 21:43:44,980 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 22619 transitions. Word has length 30 [2021-06-12 21:43:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:44,980 INFO L482 AbstractCegarLoop]: Abstraction has 6619 states and 22619 transitions. [2021-06-12 21:43:44,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 22619 transitions. [2021-06-12 21:43:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:44,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:44,988 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 21:43:45,188 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 66 times [2021-06-12 21:43:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118434125] [2021-06-12 21:43:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118434125] [2021-06-12 21:43:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118434125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587292339] [2021-06-12 21:43:45,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:45,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:43:45,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:45,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:45,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:45,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:43:45,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:43:45,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:45,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:45,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-06-12 21:43:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:45,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587292339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:45,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:45,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 21:43:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613169608] [2021-06-12 21:43:45,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:43:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:43:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:43:45,797 INFO L87 Difference]: Start difference. First operand 6619 states and 22619 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:47,849 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-12 21:43:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:50,394 INFO L93 Difference]: Finished difference Result 9450 states and 31390 transitions. [2021-06-12 21:43:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 21:43:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:50,408 INFO L225 Difference]: With dead ends: 9450 [2021-06-12 21:43:50,408 INFO L226 Difference]: Without dead ends: 9389 [2021-06-12 21:43:50,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3817.7ms TimeCoverageRelationStatistics Valid=875, Invalid=6607, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:43:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-06-12 21:43:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 6626. [2021-06-12 21:43:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 3.4176603773584904) internal successors, (22642), 6625 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 22642 transitions. [2021-06-12 21:43:50,519 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 22642 transitions. Word has length 30 [2021-06-12 21:43:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:50,519 INFO L482 AbstractCegarLoop]: Abstraction has 6626 states and 22642 transitions. [2021-06-12 21:43:50,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 22642 transitions. [2021-06-12 21:43:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:50,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:50,527 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:50,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:50,727 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1086081622, now seen corresponding path program 67 times [2021-06-12 21:43:50,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:50,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927935050] [2021-06-12 21:43:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:50,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:50,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927935050] [2021-06-12 21:43:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927935050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:50,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719373211] [2021-06-12 21:43:50,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:51,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:43:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:51,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:51,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:43:51,155 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:43:51,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:51,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:51,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:43:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:51,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719373211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:51,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:51,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:43:51,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222325517] [2021-06-12 21:43:51,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:43:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:43:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:43:51,226 INFO L87 Difference]: Start difference. First operand 6626 states and 22642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:52,857 INFO L93 Difference]: Finished difference Result 8651 states and 29045 transitions. [2021-06-12 21:43:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:43:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:52,869 INFO L225 Difference]: With dead ends: 8651 [2021-06-12 21:43:52,869 INFO L226 Difference]: Without dead ends: 8626 [2021-06-12 21:43:52,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:43:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-12 21:43:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6640. [2021-06-12 21:43:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 6639 states have (on average 3.4181352613345384) internal successors, (22693), 6639 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 22693 transitions. [2021-06-12 21:43:52,981 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 22693 transitions. Word has length 30 [2021-06-12 21:43:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:52,982 INFO L482 AbstractCegarLoop]: Abstraction has 6640 states and 22693 transitions. [2021-06-12 21:43:52,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 22693 transitions. [2021-06-12 21:43:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:52,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:52,989 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:53,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:53,190 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1576250863, now seen corresponding path program 31 times [2021-06-12 21:43:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:53,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526112990] [2021-06-12 21:43:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:53,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526112990] [2021-06-12 21:43:53,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526112990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:53,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337864645] [2021-06-12 21:43:53,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:43:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:43:53,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:53,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:53,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:53,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:43:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:53,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337864645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:53,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:53,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:43:53,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558435972] [2021-06-12 21:43:53,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:43:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:43:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:43:53,768 INFO L87 Difference]: Start difference. First operand 6640 states and 22693 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:56,873 INFO L93 Difference]: Finished difference Result 8380 states and 27963 transitions. [2021-06-12 21:43:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:43:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:43:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:56,884 INFO L225 Difference]: With dead ends: 8380 [2021-06-12 21:43:56,884 INFO L226 Difference]: Without dead ends: 8358 [2021-06-12 21:43:56,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2754.1ms TimeCoverageRelationStatistics Valid=897, Invalid=5909, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 21:43:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-12 21:43:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6638. [2021-06-12 21:43:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 3.418411933102305) internal successors, (22688), 6637 states have internal predecessors, (22688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 22688 transitions. [2021-06-12 21:43:57,006 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 22688 transitions. Word has length 30 [2021-06-12 21:43:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:57,006 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 22688 transitions. [2021-06-12 21:43:57,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 22688 transitions. [2021-06-12 21:43:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:43:57,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:57,014 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:43:57,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-12 21:43:57,214 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1302931307, now seen corresponding path program 32 times [2021-06-12 21:43:57,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:57,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136200890] [2021-06-12 21:43:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:57,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136200890] [2021-06-12 21:43:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136200890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58240272] [2021-06-12 21:43:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:57,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:43:57,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:43:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:57,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:57,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-12 21:43:57,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:43:57,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:57,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:57,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:20 [2021-06-12 21:43:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:43:57,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58240272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:57,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:57,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-12 21:43:57,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433464933] [2021-06-12 21:43:57,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:43:57,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:43:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:43:57,875 INFO L87 Difference]: Start difference. First operand 6638 states and 22688 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:59,982 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-12 21:44:00,615 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-12 21:44:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:03,742 INFO L93 Difference]: Finished difference Result 10721 states and 35147 transitions. [2021-06-12 21:44:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 21:44:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:03,758 INFO L225 Difference]: With dead ends: 10721 [2021-06-12 21:44:03,758 INFO L226 Difference]: Without dead ends: 10673 [2021-06-12 21:44:03,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 4865.1ms TimeCoverageRelationStatistics Valid=1470, Invalid=10740, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 21:44:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-06-12 21:44:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6649. [2021-06-12 21:44:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.417870036101083) internal successors, (22722), 6648 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22722 transitions. [2021-06-12 21:44:03,896 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22722 transitions. Word has length 30 [2021-06-12 21:44:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:03,896 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22722 transitions. [2021-06-12 21:44:03,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22722 transitions. [2021-06-12 21:44:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:03,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:03,904 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:04,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:04,104 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:04,104 INFO L82 PathProgramCache]: Analyzing trace with hash 276275861, now seen corresponding path program 33 times [2021-06-12 21:44:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:04,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929792371] [2021-06-12 21:44:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:04,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:04,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929792371] [2021-06-12 21:44:04,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929792371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:04,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580633296] [2021-06-12 21:44:04,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:04,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:44:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:04,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:04,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-12 21:44:04,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:44:04,661 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-12 21:44:04,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:04,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-12 21:44:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:04,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580633296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:04,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:04,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:44:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947104524] [2021-06-12 21:44:04,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:44:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:44:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:44:04,772 INFO L87 Difference]: Start difference. First operand 6649 states and 22722 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:06,419 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-12 21:44:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:08,022 INFO L93 Difference]: Finished difference Result 10431 states and 34548 transitions. [2021-06-12 21:44:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:44:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:08,037 INFO L225 Difference]: With dead ends: 10431 [2021-06-12 21:44:08,037 INFO L226 Difference]: Without dead ends: 10368 [2021-06-12 21:44:08,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2700.1ms TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:44:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-06-12 21:44:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 6656. [2021-06-12 21:44:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 3.417129977460556) internal successors, (22741), 6655 states have internal predecessors, (22741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 22741 transitions. [2021-06-12 21:44:08,167 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 22741 transitions. Word has length 30 [2021-06-12 21:44:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:08,167 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 22741 transitions. [2021-06-12 21:44:08,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 22741 transitions. [2021-06-12 21:44:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:08,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:08,175 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:08,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:08,375 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1350859047, now seen corresponding path program 34 times [2021-06-12 21:44:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:08,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412272386] [2021-06-12 21:44:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:08,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:08,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412272386] [2021-06-12 21:44:08,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412272386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:08,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391626551] [2021-06-12 21:44:08,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:08,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:08,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:08,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 21:44:08,882 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:44:08,897 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-12 21:44:08,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:08,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-06-12 21:44:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:08,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391626551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:08,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:08,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:44:08,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085030421] [2021-06-12 21:44:08,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:44:08,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:44:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:44:08,971 INFO L87 Difference]: Start difference. First operand 6656 states and 22741 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:10,891 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-12 21:44:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:11,642 INFO L93 Difference]: Finished difference Result 10017 states and 33312 transitions. [2021-06-12 21:44:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:44:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:11,656 INFO L225 Difference]: With dead ends: 10017 [2021-06-12 21:44:11,656 INFO L226 Difference]: Without dead ends: 9945 [2021-06-12 21:44:11,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2221.7ms TimeCoverageRelationStatistics Valid=723, Invalid=4107, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:44:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-12 21:44:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 6722. [2021-06-12 21:44:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.41809254575212) internal successors, (22973), 6721 states have internal predecessors, (22973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22973 transitions. [2021-06-12 21:44:11,767 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22973 transitions. Word has length 30 [2021-06-12 21:44:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:11,767 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22973 transitions. [2021-06-12 21:44:11,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22973 transitions. [2021-06-12 21:44:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:11,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:11,775 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:11,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 21:44:11,976 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655007, now seen corresponding path program 35 times [2021-06-12 21:44:11,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:11,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082987658] [2021-06-12 21:44:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082987658] [2021-06-12 21:44:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082987658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831704976] [2021-06-12 21:44:12,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:12,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:44:12,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:44:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:12,649 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 21:44:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-06-12 21:44:12,651 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:12,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:12,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:12,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-12 21:44:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:12,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831704976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:12,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:12,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:44:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248566640] [2021-06-12 21:44:12,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:44:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:44:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:44:12,671 INFO L87 Difference]: Start difference. First operand 6722 states and 22973 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:17,309 INFO L93 Difference]: Finished difference Result 8927 states and 29552 transitions. [2021-06-12 21:44:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 21:44:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:17,322 INFO L225 Difference]: With dead ends: 8927 [2021-06-12 21:44:17,322 INFO L226 Difference]: Without dead ends: 8898 [2021-06-12 21:44:17,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 3920.5ms TimeCoverageRelationStatistics Valid=1157, Invalid=8743, Unknown=0, NotChecked=0, Total=9900 [2021-06-12 21:44:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-06-12 21:44:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6748. [2021-06-12 21:44:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6747 states have (on average 3.4179635393508225) internal successors, (23061), 6747 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 23061 transitions. [2021-06-12 21:44:17,419 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 23061 transitions. Word has length 30 [2021-06-12 21:44:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:17,419 INFO L482 AbstractCegarLoop]: Abstraction has 6748 states and 23061 transitions. [2021-06-12 21:44:17,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 23061 transitions. [2021-06-12 21:44:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:17,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:17,427 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:17,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 21:44:17,628 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1871803969, now seen corresponding path program 36 times [2021-06-12 21:44:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426348971] [2021-06-12 21:44:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:17,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426348971] [2021-06-12 21:44:17,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426348971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003435151] [2021-06-12 21:44:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:17,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:44:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:44:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:18,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:18,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 43 [2021-06-12 21:44:18,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:44:18,187 INFO L628 ElimStorePlain]: treesize reduction 100, result has 16.7 percent of original size [2021-06-12 21:44:18,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:18,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:20 [2021-06-12 21:44:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:18,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003435151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:18,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:18,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-12 21:44:18,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850620182] [2021-06-12 21:44:18,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:44:18,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:44:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:44:18,281 INFO L87 Difference]: Start difference. First operand 6748 states and 23061 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:24,423 INFO L93 Difference]: Finished difference Result 11440 states and 37396 transitions. [2021-06-12 21:44:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-12 21:44:24,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:24,439 INFO L225 Difference]: With dead ends: 11440 [2021-06-12 21:44:24,440 INFO L226 Difference]: Without dead ends: 11377 [2021-06-12 21:44:24,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4941 ImplicationChecksByTransitivity, 5115.7ms TimeCoverageRelationStatistics Valid=1803, Invalid=13203, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 21:44:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11377 states. [2021-06-12 21:44:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11377 to 6877. [2021-06-12 21:44:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.4157940663176265) internal successors, (23487), 6876 states have internal predecessors, (23487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 23487 transitions. [2021-06-12 21:44:24,558 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 23487 transitions. Word has length 30 [2021-06-12 21:44:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:24,558 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 23487 transitions. [2021-06-12 21:44:24,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 23487 transitions. [2021-06-12 21:44:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:24,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:24,566 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:24,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 21:44:24,766 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1119954797, now seen corresponding path program 37 times [2021-06-12 21:44:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:24,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599869069] [2021-06-12 21:44:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:25,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599869069] [2021-06-12 21:44:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599869069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407808843] [2021-06-12 21:44:25,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:25,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:25,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:25,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:44:25,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:25,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:25,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:25,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-12 21:44:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:25,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407808843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:25,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:25,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:44:25,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654516699] [2021-06-12 21:44:25,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:44:25,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:44:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:44:25,457 INFO L87 Difference]: Start difference. First operand 6877 states and 23487 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:29,582 INFO L93 Difference]: Finished difference Result 8722 states and 29097 transitions. [2021-06-12 21:44:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:44:29,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:29,594 INFO L225 Difference]: With dead ends: 8722 [2021-06-12 21:44:29,594 INFO L226 Difference]: Without dead ends: 8696 [2021-06-12 21:44:29,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 3730.3ms TimeCoverageRelationStatistics Valid=874, Invalid=6608, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:44:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2021-06-12 21:44:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6874. [2021-06-12 21:44:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-12 21:44:29,689 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-12 21:44:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:29,689 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-12 21:44:29,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-12 21:44:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:29,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:29,697 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:29,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:29,898 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1353770535, now seen corresponding path program 38 times [2021-06-12 21:44:29,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:29,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158758259] [2021-06-12 21:44:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:30,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158758259] [2021-06-12 21:44:30,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158758259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747904301] [2021-06-12 21:44:30,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:30,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:44:30,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:30,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:30,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:30,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:44:30,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:30,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:30,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:30,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:44:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747904301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:30,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:30,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:44:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792853598] [2021-06-12 21:44:30,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:44:30,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:44:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:44:30,463 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:32,425 INFO L93 Difference]: Finished difference Result 8472 states and 28350 transitions. [2021-06-12 21:44:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:44:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:32,437 INFO L225 Difference]: With dead ends: 8472 [2021-06-12 21:44:32,437 INFO L226 Difference]: Without dead ends: 8446 [2021-06-12 21:44:32,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1719.6ms TimeCoverageRelationStatistics Valid=445, Invalid=2861, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:44:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-06-12 21:44:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 6874. [2021-06-12 21:44:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-12 21:44:32,529 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-12 21:44:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:32,529 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-12 21:44:32,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-12 21:44:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:32,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:32,537 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:32,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 21:44:32,738 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash -153504787, now seen corresponding path program 39 times [2021-06-12 21:44:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803795241] [2021-06-12 21:44:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:33,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:33,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803795241] [2021-06-12 21:44:33,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803795241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:33,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863212073] [2021-06-12 21:44:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:33,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:44:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:33,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-12 21:44:33,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:44:33,266 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-12 21:44:33,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:33,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-12 21:44:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:33,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863212073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:33,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:33,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:44:33,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608620747] [2021-06-12 21:44:33,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:44:33,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:44:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:44:33,310 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:35,446 INFO L93 Difference]: Finished difference Result 9020 states and 29936 transitions. [2021-06-12 21:44:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:44:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:35,460 INFO L225 Difference]: With dead ends: 9020 [2021-06-12 21:44:35,460 INFO L226 Difference]: Without dead ends: 8964 [2021-06-12 21:44:35,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1688.9ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:44:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-06-12 21:44:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6858. [2021-06-12 21:44:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 3.41519614991979) internal successors, (23418), 6857 states have internal predecessors, (23418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 23418 transitions. [2021-06-12 21:44:35,565 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 23418 transitions. Word has length 30 [2021-06-12 21:44:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:35,565 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 23418 transitions. [2021-06-12 21:44:35,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 23418 transitions. [2021-06-12 21:44:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:35,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:35,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:35,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 21:44:35,777 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1190293913, now seen corresponding path program 40 times [2021-06-12 21:44:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846091506] [2021-06-12 21:44:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:36,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:36,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846091506] [2021-06-12 21:44:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846091506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071718456] [2021-06-12 21:44:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:36,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:36,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:36,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:44:36,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:36,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:36,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:36,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-12 21:44:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071718456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:36,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:36,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:44:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122737414] [2021-06-12 21:44:36,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:44:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:44:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:44:36,346 INFO L87 Difference]: Start difference. First operand 6858 states and 23418 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:37,770 INFO L93 Difference]: Finished difference Result 8455 states and 28275 transitions. [2021-06-12 21:44:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:44:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:37,782 INFO L225 Difference]: With dead ends: 8455 [2021-06-12 21:44:37,783 INFO L226 Difference]: Without dead ends: 8440 [2021-06-12 21:44:37,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:44:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-06-12 21:44:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 6848. [2021-06-12 21:44:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 3.416532788082372) internal successors, (23393), 6847 states have internal predecessors, (23393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 23393 transitions. [2021-06-12 21:44:37,881 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 23393 transitions. Word has length 30 [2021-06-12 21:44:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:37,881 INFO L482 AbstractCegarLoop]: Abstraction has 6848 states and 23393 transitions. [2021-06-12 21:44:37,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 23393 transitions. [2021-06-12 21:44:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:37,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:37,889 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:38,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:38,090 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1093552081, now seen corresponding path program 41 times [2021-06-12 21:44:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2897415] [2021-06-12 21:44:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:38,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:38,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2897415] [2021-06-12 21:44:38,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2897415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:38,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536901045] [2021-06-12 21:44:38,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:38,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:44:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:38,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:38,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:38,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-12 21:44:38,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:44:38,656 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-06-12 21:44:38,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:38,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:44:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536901045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:44:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930337672] [2021-06-12 21:44:38,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:44:38,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:44:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:44:38,731 INFO L87 Difference]: Start difference. First operand 6848 states and 23393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:40,424 INFO L93 Difference]: Finished difference Result 8682 states and 29011 transitions. [2021-06-12 21:44:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:44:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:40,437 INFO L225 Difference]: With dead ends: 8682 [2021-06-12 21:44:40,437 INFO L226 Difference]: Without dead ends: 8637 [2021-06-12 21:44:40,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1438.0ms TimeCoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:44:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-12 21:44:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6836. [2021-06-12 21:44:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-12 21:44:40,561 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-12 21:44:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:40,561 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-12 21:44:40,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-12 21:44:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:40,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:40,569 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:40,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:40,770 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1107184069, now seen corresponding path program 42 times [2021-06-12 21:44:40,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:40,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919844971] [2021-06-12 21:44:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:41,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:41,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919844971] [2021-06-12 21:44:41,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919844971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:41,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451167776] [2021-06-12 21:44:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:41,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:44:41,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:44:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:41,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:41,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:44:41,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:41,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:41,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:44:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451167776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:41,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:41,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:44:41,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219022124] [2021-06-12 21:44:41,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:44:41,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:44:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:44:41,320 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:42,270 INFO L93 Difference]: Finished difference Result 8350 states and 28001 transitions. [2021-06-12 21:44:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:44:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:42,282 INFO L225 Difference]: With dead ends: 8350 [2021-06-12 21:44:42,282 INFO L226 Difference]: Without dead ends: 8335 [2021-06-12 21:44:42,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1024.3ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:44:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-12 21:44:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 6836. [2021-06-12 21:44:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-12 21:44:42,422 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-12 21:44:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:42,422 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-12 21:44:42,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-12 21:44:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:42,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:42,430 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:42,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 21:44:42,631 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1610082335, now seen corresponding path program 43 times [2021-06-12 21:44:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:42,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609667456] [2021-06-12 21:44:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:43,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609667456] [2021-06-12 21:44:43,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609667456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:43,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405327392] [2021-06-12 21:44:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:44:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:44:43,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:43,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:44:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:43,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405327392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:43,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:43,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:44:43,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405522211] [2021-06-12 21:44:43,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:44:43,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:44:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:44:43,203 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:47,716 INFO L93 Difference]: Finished difference Result 10075 states and 32916 transitions. [2021-06-12 21:44:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 21:44:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:47,730 INFO L225 Difference]: With dead ends: 10075 [2021-06-12 21:44:47,730 INFO L226 Difference]: Without dead ends: 10049 [2021-06-12 21:44:47,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 3925.6ms TimeCoverageRelationStatistics Valid=1570, Invalid=8330, Unknown=0, NotChecked=0, Total=9900 [2021-06-12 21:44:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2021-06-12 21:44:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 6864. [2021-06-12 21:44:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 3.420370100539123) internal successors, (23474), 6863 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 23474 transitions. [2021-06-12 21:44:47,834 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 23474 transitions. Word has length 30 [2021-06-12 21:44:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:47,834 INFO L482 AbstractCegarLoop]: Abstraction has 6864 states and 23474 transitions. [2021-06-12 21:44:47,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 23474 transitions. [2021-06-12 21:44:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:47,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:47,842 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:48,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:48,042 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2098603023, now seen corresponding path program 44 times [2021-06-12 21:44:48,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:48,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356679456] [2021-06-12 21:44:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:48,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:48,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356679456] [2021-06-12 21:44:48,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356679456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:48,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037733841] [2021-06-12 21:44:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:48,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:44:48,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:44:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:48,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:48,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:44:48,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:48,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:48,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:48,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-06-12 21:44:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037733841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:48,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:48,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-12 21:44:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465452658] [2021-06-12 21:44:48,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:44:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:44:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:44:48,567 INFO L87 Difference]: Start difference. First operand 6864 states and 23474 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:50,715 INFO L93 Difference]: Finished difference Result 11521 states and 37730 transitions. [2021-06-12 21:44:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:44:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:50,732 INFO L225 Difference]: With dead ends: 11521 [2021-06-12 21:44:50,733 INFO L226 Difference]: Without dead ends: 11500 [2021-06-12 21:44:50,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1573.5ms TimeCoverageRelationStatistics Valid=665, Invalid=4447, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:44:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-06-12 21:44:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6890. [2021-06-12 21:44:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 3.4235738133255915) internal successors, (23585), 6889 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 23585 transitions. [2021-06-12 21:44:50,861 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 23585 transitions. Word has length 30 [2021-06-12 21:44:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:50,861 INFO L482 AbstractCegarLoop]: Abstraction has 6890 states and 23585 transitions. [2021-06-12 21:44:50,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 23585 transitions. [2021-06-12 21:44:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:50,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:50,870 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:51,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:51,070 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2044173309, now seen corresponding path program 45 times [2021-06-12 21:44:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:51,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693619609] [2021-06-12 21:44:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:51,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:51,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693619609] [2021-06-12 21:44:51,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693619609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:51,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460401990] [2021-06-12 21:44:51,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:51,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:44:51,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:44:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:51,587 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 21:44:51,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-06-12 21:44:51,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:51,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:51,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:51,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-06-12 21:44:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460401990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:51,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:51,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-12 21:44:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952329063] [2021-06-12 21:44:51,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:44:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:44:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:44:51,636 INFO L87 Difference]: Start difference. First operand 6890 states and 23585 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:52,837 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 21:44:56,237 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 21:44:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:56,850 INFO L93 Difference]: Finished difference Result 11048 states and 36381 transitions. [2021-06-12 21:44:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-12 21:44:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:44:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:56,865 INFO L225 Difference]: With dead ends: 11048 [2021-06-12 21:44:56,865 INFO L226 Difference]: Without dead ends: 10971 [2021-06-12 21:44:56,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4103.8ms TimeCoverageRelationStatistics Valid=1535, Invalid=9385, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 21:44:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-12 21:44:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 7036. [2021-06-12 21:44:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.4169154228855723) internal successors, (24038), 7035 states have internal predecessors, (24038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 24038 transitions. [2021-06-12 21:44:56,986 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 24038 transitions. Word has length 30 [2021-06-12 21:44:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:56,986 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 24038 transitions. [2021-06-12 21:44:56,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 24038 transitions. [2021-06-12 21:44:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:44:56,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:56,994 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:44:57,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 21:44:57,195 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2029573961, now seen corresponding path program 46 times [2021-06-12 21:44:57,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:57,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426472210] [2021-06-12 21:44:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:57,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426472210] [2021-06-12 21:44:57,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426472210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114476037] [2021-06-12 21:44:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:57,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:44:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:57,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:57,879 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 21:44:57,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-12 21:44:57,881 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:57,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:57,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:57,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-12 21:44:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:57,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114476037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:57,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:57,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:44:57,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484998449] [2021-06-12 21:44:57,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:44:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:44:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:44:57,937 INFO L87 Difference]: Start difference. First operand 7036 states and 24038 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:00,787 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 21:45:00,982 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-12 21:45:01,471 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-12 21:45:01,601 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-12 21:45:02,030 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 21:45:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:02,885 INFO L93 Difference]: Finished difference Result 9538 states and 31634 transitions. [2021-06-12 21:45:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 21:45:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:02,899 INFO L225 Difference]: With dead ends: 9538 [2021-06-12 21:45:02,899 INFO L226 Difference]: Without dead ends: 9523 [2021-06-12 21:45:02,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4371.7ms TimeCoverageRelationStatistics Valid=981, Invalid=6675, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 21:45:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-06-12 21:45:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 7037. [2021-06-12 21:45:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 3.417140420693576) internal successors, (24043), 7036 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 24043 transitions. [2021-06-12 21:45:03,003 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 24043 transitions. Word has length 30 [2021-06-12 21:45:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:03,003 INFO L482 AbstractCegarLoop]: Abstraction has 7037 states and 24043 transitions. [2021-06-12 21:45:03,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 24043 transitions. [2021-06-12 21:45:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:03,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:03,011 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:03,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-12 21:45:03,211 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:03,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1541053273, now seen corresponding path program 47 times [2021-06-12 21:45:03,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:03,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425925427] [2021-06-12 21:45:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:03,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425925427] [2021-06-12 21:45:03,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425925427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51702758] [2021-06-12 21:45:03,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:03,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:45:03,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:03,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 21:45:03,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:45:03,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:03,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:03,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-12 21:45:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51702758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:03,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-12 21:45:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577854561] [2021-06-12 21:45:03,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:45:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:45:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:45:03,730 INFO L87 Difference]: Start difference. First operand 7037 states and 24043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:08,957 INFO L93 Difference]: Finished difference Result 12819 states and 41403 transitions. [2021-06-12 21:45:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 21:45:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:08,977 INFO L225 Difference]: With dead ends: 12819 [2021-06-12 21:45:08,978 INFO L226 Difference]: Without dead ends: 12789 [2021-06-12 21:45:08,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 4282.1ms TimeCoverageRelationStatistics Valid=1803, Invalid=10853, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 21:45:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-06-12 21:45:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 7083. [2021-06-12 21:45:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.415419373058458) internal successors, (24188), 7082 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 24188 transitions. [2021-06-12 21:45:09,117 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 24188 transitions. Word has length 30 [2021-06-12 21:45:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:09,118 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 24188 transitions. [2021-06-12 21:45:09,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 24188 transitions. [2021-06-12 21:45:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:09,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:09,157 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:09,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 21:45:09,357 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1282297551, now seen corresponding path program 48 times [2021-06-12 21:45:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:09,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651337891] [2021-06-12 21:45:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:09,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:09,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651337891] [2021-06-12 21:45:09,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651337891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:09,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255400365] [2021-06-12 21:45:09,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:09,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:45:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:45:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:09,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:09,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 21:45:09,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:45:10,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:10,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:10,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-12 21:45:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:10,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255400365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:10,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:10,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:45:10,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151506022] [2021-06-12 21:45:10,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:45:10,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:45:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:45:10,070 INFO L87 Difference]: Start difference. First operand 7083 states and 24188 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:12,838 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-12 21:45:13,027 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-12 21:45:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:14,607 INFO L93 Difference]: Finished difference Result 9072 states and 30203 transitions. [2021-06-12 21:45:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:45:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:14,620 INFO L225 Difference]: With dead ends: 9072 [2021-06-12 21:45:14,620 INFO L226 Difference]: Without dead ends: 9057 [2021-06-12 21:45:14,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3974.6ms TimeCoverageRelationStatistics Valid=889, Invalid=6767, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 21:45:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-12 21:45:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7074. [2021-06-12 21:45:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.4155238229888307) internal successors, (24158), 7073 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 24158 transitions. [2021-06-12 21:45:14,719 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 24158 transitions. Word has length 30 [2021-06-12 21:45:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:14,719 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 24158 transitions. [2021-06-12 21:45:14,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 24158 transitions. [2021-06-12 21:45:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:14,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:14,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:14,936 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash 499662597, now seen corresponding path program 49 times [2021-06-12 21:45:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:14,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430733138] [2021-06-12 21:45:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:15,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430733138] [2021-06-12 21:45:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430733138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661740654] [2021-06-12 21:45:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:45:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:15,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:45:15,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:15,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:15,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:15,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:45:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661740654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:15,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:15,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:45:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453489194] [2021-06-12 21:45:15,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:15,496 INFO L87 Difference]: Start difference. First operand 7074 states and 24158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:17,865 INFO L93 Difference]: Finished difference Result 8621 states and 28929 transitions. [2021-06-12 21:45:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:45:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:17,878 INFO L225 Difference]: With dead ends: 8621 [2021-06-12 21:45:17,878 INFO L226 Difference]: Without dead ends: 8595 [2021-06-12 21:45:17,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2007.2ms TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:45:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-06-12 21:45:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7060. [2021-06-12 21:45:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.417339566510837) internal successors, (24123), 7059 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 24123 transitions. [2021-06-12 21:45:17,991 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 24123 transitions. Word has length 30 [2021-06-12 21:45:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:17,991 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 24123 transitions. [2021-06-12 21:45:17,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 24123 transitions. [2021-06-12 21:45:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:18,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:18,000 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:18,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:18,200 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1728681022, now seen corresponding path program 68 times [2021-06-12 21:45:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:18,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326834376] [2021-06-12 21:45:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:18,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:18,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326834376] [2021-06-12 21:45:18,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326834376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:18,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599580520] [2021-06-12 21:45:18,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:45:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:18,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:18,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:18,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:18,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:18,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:18,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:18,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599580520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:18,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:18,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102186009] [2021-06-12 21:45:18,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:18,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:18,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:18,589 INFO L87 Difference]: Start difference. First operand 7060 states and 24123 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:19,399 INFO L93 Difference]: Finished difference Result 8380 states and 27726 transitions. [2021-06-12 21:45:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:45:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:19,411 INFO L225 Difference]: With dead ends: 8380 [2021-06-12 21:45:19,411 INFO L226 Difference]: Without dead ends: 8365 [2021-06-12 21:45:19,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:45:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-12 21:45:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7072. [2021-06-12 21:45:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.4171970018384954) internal successors, (24163), 7071 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 24163 transitions. [2021-06-12 21:45:19,508 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 24163 transitions. Word has length 30 [2021-06-12 21:45:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:19,508 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 24163 transitions. [2021-06-12 21:45:19,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 24163 transitions. [2021-06-12 21:45:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:19,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:19,517 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:19,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 21:45:19,717 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash -691888966, now seen corresponding path program 69 times [2021-06-12 21:45:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793862884] [2021-06-12 21:45:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:19,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:19,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793862884] [2021-06-12 21:45:19,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793862884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:19,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479214540] [2021-06-12 21:45:19,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:19,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:45:19,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:45:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:20,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:20,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:20,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:20,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:20,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:45:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:20,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479214540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:20,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:20,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:20,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513887253] [2021-06-12 21:45:20,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:20,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:20,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:20,193 INFO L87 Difference]: Start difference. First operand 7072 states and 24163 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:21,151 INFO L93 Difference]: Finished difference Result 8309 states and 27513 transitions. [2021-06-12 21:45:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:45:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:21,162 INFO L225 Difference]: With dead ends: 8309 [2021-06-12 21:45:21,163 INFO L226 Difference]: Without dead ends: 8279 [2021-06-12 21:45:21,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:45:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-06-12 21:45:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 7064. [2021-06-12 21:45:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.4176695455189012) internal successors, (24139), 7063 states have internal predecessors, (24139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 24139 transitions. [2021-06-12 21:45:21,259 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 24139 transitions. Word has length 30 [2021-06-12 21:45:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:21,259 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 24139 transitions. [2021-06-12 21:45:21,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 24139 transitions. [2021-06-12 21:45:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:21,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:21,267 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:21,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 21:45:21,467 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash 682939496, now seen corresponding path program 70 times [2021-06-12 21:45:21,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:21,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112645699] [2021-06-12 21:45:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:21,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112645699] [2021-06-12 21:45:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112645699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824840898] [2021-06-12 21:45:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:21,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:45:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:21,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:21,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:21,807 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:21,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:21,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:21,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:45:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:21,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824840898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:21,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:21,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:21,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355047815] [2021-06-12 21:45:21,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:21,887 INFO L87 Difference]: Start difference. First operand 7064 states and 24139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:24,095 INFO L93 Difference]: Finished difference Result 13253 states and 43828 transitions. [2021-06-12 21:45:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:45:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:24,115 INFO L225 Difference]: With dead ends: 13253 [2021-06-12 21:45:24,115 INFO L226 Difference]: Without dead ends: 13223 [2021-06-12 21:45:24,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:45:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2021-06-12 21:45:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 7065. [2021-06-12 21:45:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.4173272933182335) internal successors, (24140), 7064 states have internal predecessors, (24140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 24140 transitions. [2021-06-12 21:45:24,263 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 24140 transitions. Word has length 30 [2021-06-12 21:45:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 24140 transitions. [2021-06-12 21:45:24,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 24140 transitions. [2021-06-12 21:45:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:24,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:24,272 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:24,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 21:45:24,472 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash -8608016, now seen corresponding path program 71 times [2021-06-12 21:45:24,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:24,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045069884] [2021-06-12 21:45:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:24,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045069884] [2021-06-12 21:45:24,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045069884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640999700] [2021-06-12 21:45:24,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:24,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:45:24,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:24,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:24,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:24,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:24,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:24,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:24,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640999700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:24,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:24,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903776010] [2021-06-12 21:45:24,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:24,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:24,857 INFO L87 Difference]: Start difference. First operand 7065 states and 24140 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:25,595 INFO L93 Difference]: Finished difference Result 8952 states and 29987 transitions. [2021-06-12 21:45:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:45:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:25,608 INFO L225 Difference]: With dead ends: 8952 [2021-06-12 21:45:25,609 INFO L226 Difference]: Without dead ends: 8937 [2021-06-12 21:45:25,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:45:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2021-06-12 21:45:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 7070. [2021-06-12 21:45:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.417032112038478) internal successors, (24155), 7069 states have internal predecessors, (24155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 24155 transitions. [2021-06-12 21:45:25,708 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 24155 transitions. Word has length 30 [2021-06-12 21:45:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:25,708 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 24155 transitions. [2021-06-12 21:45:25,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 24155 transitions. [2021-06-12 21:45:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:25,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:25,716 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:25,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-12 21:45:25,917 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1865789292, now seen corresponding path program 72 times [2021-06-12 21:45:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13445230] [2021-06-12 21:45:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:26,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13445230] [2021-06-12 21:45:26,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13445230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:26,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145017561] [2021-06-12 21:45:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:26,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:45:26,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:45:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:26,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:45:26,258 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:26,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:26,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:26,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:45:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:26,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145017561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:26,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:26,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:45:26,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344295186] [2021-06-12 21:45:26,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:45:26,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:45:26,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:45:26,320 INFO L87 Difference]: Start difference. First operand 7070 states and 24155 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:27,918 INFO L93 Difference]: Finished difference Result 9351 states and 31228 transitions. [2021-06-12 21:45:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:45:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:27,931 INFO L225 Difference]: With dead ends: 9351 [2021-06-12 21:45:27,932 INFO L226 Difference]: Without dead ends: 9316 [2021-06-12 21:45:27,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1114.4ms TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:45:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-12 21:45:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7069. [2021-06-12 21:45:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-12 21:45:28,060 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-12 21:45:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:28,060 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-12 21:45:28,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-12 21:45:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:28,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:28,069 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:28,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 21:45:28,269 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -43636904, now seen corresponding path program 73 times [2021-06-12 21:45:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157481328] [2021-06-12 21:45:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:28,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157481328] [2021-06-12 21:45:28,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157481328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451104723] [2021-06-12 21:45:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:28,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:28,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:28,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:28,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:28,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:28,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:28,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451104723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:28,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:28,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:28,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269545173] [2021-06-12 21:45:28,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:28,658 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:29,748 INFO L93 Difference]: Finished difference Result 9314 states and 31182 transitions. [2021-06-12 21:45:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:45:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:29,762 INFO L225 Difference]: With dead ends: 9314 [2021-06-12 21:45:29,762 INFO L226 Difference]: Without dead ends: 9299 [2021-06-12 21:45:29,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 906.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:45:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-06-12 21:45:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 7071. [2021-06-12 21:45:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.4164073550212164) internal successors, (24154), 7070 states have internal predecessors, (24154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 24154 transitions. [2021-06-12 21:45:29,869 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 24154 transitions. Word has length 30 [2021-06-12 21:45:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:29,869 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 24154 transitions. [2021-06-12 21:45:29,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 24154 transitions. [2021-06-12 21:45:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:29,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:29,878 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:30,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:30,078 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 154706472, now seen corresponding path program 74 times [2021-06-12 21:45:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:30,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696469716] [2021-06-12 21:45:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:30,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:30,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696469716] [2021-06-12 21:45:30,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696469716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:30,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991227636] [2021-06-12 21:45:30,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:30,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:45:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:30,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:30,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:30,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:30,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 21:45:30,454 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:30,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:30,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:30,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2021-06-12 21:45:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:30,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991227636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:30,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:30,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92852296] [2021-06-12 21:45:30,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:30,508 INFO L87 Difference]: Start difference. First operand 7071 states and 24154 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:32,021 INFO L93 Difference]: Finished difference Result 9796 states and 32685 transitions. [2021-06-12 21:45:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:45:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:32,036 INFO L225 Difference]: With dead ends: 9796 [2021-06-12 21:45:32,036 INFO L226 Difference]: Without dead ends: 9781 [2021-06-12 21:45:32,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:45:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-12 21:45:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7069. [2021-06-12 21:45:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-12 21:45:32,167 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-12 21:45:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:32,167 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-12 21:45:32,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-12 21:45:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:32,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:32,176 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:32,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-12 21:45:32,376 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1280772920, now seen corresponding path program 75 times [2021-06-12 21:45:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:32,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874229256] [2021-06-12 21:45:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:32,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874229256] [2021-06-12 21:45:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874229256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534260735] [2021-06-12 21:45:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:32,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:45:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:32,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:32,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:32,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:32,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:45:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:32,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534260735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:32,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:32,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:32,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582408769] [2021-06-12 21:45:32,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:32,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:32,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:32,794 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:34,386 INFO L93 Difference]: Finished difference Result 11687 states and 38279 transitions. [2021-06-12 21:45:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:45:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:34,433 INFO L225 Difference]: With dead ends: 11687 [2021-06-12 21:45:34,433 INFO L226 Difference]: Without dead ends: 11666 [2021-06-12 21:45:34,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1002.5ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:45:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2021-06-12 21:45:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 7054. [2021-06-12 21:45:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.4162767616617042) internal successors, (24095), 7053 states have internal predecessors, (24095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 24095 transitions. [2021-06-12 21:45:34,547 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 24095 transitions. Word has length 30 [2021-06-12 21:45:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:34,547 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 24095 transitions. [2021-06-12 21:45:34,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 24095 transitions. [2021-06-12 21:45:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:34,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:34,556 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:34,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 21:45:34,761 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash -575656810, now seen corresponding path program 76 times [2021-06-12 21:45:34,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:34,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457346929] [2021-06-12 21:45:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:34,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457346929] [2021-06-12 21:45:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457346929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342701465] [2021-06-12 21:45:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:34,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:45:34,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:35,187 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 21:45:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-06-12 21:45:35,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:35,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:35,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:35,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-06-12 21:45:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:35,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342701465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:35,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:35,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968179627] [2021-06-12 21:45:35,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:35,214 INFO L87 Difference]: Start difference. First operand 7054 states and 24095 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:36,655 INFO L93 Difference]: Finished difference Result 10880 states and 36101 transitions. [2021-06-12 21:45:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:45:36,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:36,670 INFO L225 Difference]: With dead ends: 10880 [2021-06-12 21:45:36,670 INFO L226 Difference]: Without dead ends: 10859 [2021-06-12 21:45:36,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 864.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:45:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-06-12 21:45:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 7061. [2021-06-12 21:45:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 3.41685552407932) internal successors, (24123), 7060 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 24123 transitions. [2021-06-12 21:45:36,780 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 24123 transitions. Word has length 30 [2021-06-12 21:45:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:36,780 INFO L482 AbstractCegarLoop]: Abstraction has 7061 states and 24123 transitions. [2021-06-12 21:45:36,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 24123 transitions. [2021-06-12 21:45:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:36,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:36,789 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:36,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 21:45:36,989 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1197451026, now seen corresponding path program 77 times [2021-06-12 21:45:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:36,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425834664] [2021-06-12 21:45:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:37,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:37,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425834664] [2021-06-12 21:45:37,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425834664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:37,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217381263] [2021-06-12 21:45:37,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:37,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:45:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:37,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:37,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:37,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:37,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:37,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:45:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:37,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217381263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:37,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:37,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 21:45:37,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386218868] [2021-06-12 21:45:37,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:45:37,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:45:37,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:45:37,411 INFO L87 Difference]: Start difference. First operand 7061 states and 24123 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:39,215 INFO L93 Difference]: Finished difference Result 11290 states and 37387 transitions. [2021-06-12 21:45:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:45:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:39,230 INFO L225 Difference]: With dead ends: 11290 [2021-06-12 21:45:39,231 INFO L226 Difference]: Without dead ends: 11254 [2021-06-12 21:45:39,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1419.2ms TimeCoverageRelationStatistics Valid=553, Invalid=3353, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:45:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2021-06-12 21:45:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 7068. [2021-06-12 21:45:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.4184236592613555) internal successors, (24158), 7067 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 24158 transitions. [2021-06-12 21:45:39,346 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 24158 transitions. Word has length 30 [2021-06-12 21:45:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:39,346 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 24158 transitions. [2021-06-12 21:45:39,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 24158 transitions. [2021-06-12 21:45:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:39,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:39,354 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:39,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-12 21:45:39,554 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 479008484, now seen corresponding path program 78 times [2021-06-12 21:45:39,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:39,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918906216] [2021-06-12 21:45:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918906216] [2021-06-12 21:45:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918906216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324957061] [2021-06-12 21:45:39,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:39,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:45:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:39,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:39,900 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:39,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:39,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:39,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:45:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324957061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:39,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:39,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576856700] [2021-06-12 21:45:39,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:39,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:39,950 INFO L87 Difference]: Start difference. First operand 7068 states and 24158 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:41,356 INFO L93 Difference]: Finished difference Result 11632 states and 38612 transitions. [2021-06-12 21:45:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:45:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:41,373 INFO L225 Difference]: With dead ends: 11632 [2021-06-12 21:45:41,373 INFO L226 Difference]: Without dead ends: 11582 [2021-06-12 21:45:41,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:45:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11582 states. [2021-06-12 21:45:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11582 to 7063. [2021-06-12 21:45:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 3.4170206740300197) internal successors, (24131), 7062 states have internal predecessors, (24131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 24131 transitions. [2021-06-12 21:45:41,491 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 24131 transitions. Word has length 30 [2021-06-12 21:45:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:41,491 INFO L482 AbstractCegarLoop]: Abstraction has 7063 states and 24131 transitions. [2021-06-12 21:45:41,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 24131 transitions. [2021-06-12 21:45:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:41,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:41,499 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:41,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-12 21:45:41,700 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash -327230800, now seen corresponding path program 79 times [2021-06-12 21:45:41,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:41,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980319361] [2021-06-12 21:45:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:41,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:41,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980319361] [2021-06-12 21:45:41,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980319361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010805008] [2021-06-12 21:45:41,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:42,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:42,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:42,069 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:42,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:42,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:42,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:45:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010805008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:42,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:42,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228653957] [2021-06-12 21:45:42,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:42,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:42,118 INFO L87 Difference]: Start difference. First operand 7063 states and 24131 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:43,194 INFO L93 Difference]: Finished difference Result 11229 states and 37406 transitions. [2021-06-12 21:45:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:45:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:43,210 INFO L225 Difference]: With dead ends: 11229 [2021-06-12 21:45:43,210 INFO L226 Difference]: Without dead ends: 11179 [2021-06-12 21:45:43,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:45:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-06-12 21:45:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7078. [2021-06-12 21:45:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.4183976261127595) internal successors, (24192), 7077 states have internal predecessors, (24192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 24192 transitions. [2021-06-12 21:45:43,327 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 24192 transitions. Word has length 30 [2021-06-12 21:45:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:43,327 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 24192 transitions. [2021-06-12 21:45:43,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 24192 transitions. [2021-06-12 21:45:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:43,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:43,335 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:43,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:43,536 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1558548792, now seen corresponding path program 80 times [2021-06-12 21:45:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:43,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922799018] [2021-06-12 21:45:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:43,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:43,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922799018] [2021-06-12 21:45:43,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922799018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:43,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777702865] [2021-06-12 21:45:43,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:43,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:45:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:43,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:43,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:43,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:43,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:45:43,903 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:43,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:43,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:43,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-12 21:45:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:43,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777702865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:43,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:43,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432398211] [2021-06-12 21:45:43,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:43,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:43,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:43,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:43,970 INFO L87 Difference]: Start difference. First operand 7078 states and 24192 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:45,241 INFO L93 Difference]: Finished difference Result 10337 states and 34372 transitions. [2021-06-12 21:45:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:45:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:45,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:45,256 INFO L225 Difference]: With dead ends: 10337 [2021-06-12 21:45:45,257 INFO L226 Difference]: Without dead ends: 10256 [2021-06-12 21:45:45,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:45:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2021-06-12 21:45:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7079. [2021-06-12 21:45:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-12 21:45:45,369 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-12 21:45:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:45,369 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-12 21:45:45,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-12 21:45:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:45,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:45,377 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:45,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-12 21:45:45,577 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash 211718524, now seen corresponding path program 81 times [2021-06-12 21:45:45,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:45,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075635483] [2021-06-12 21:45:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:45,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075635483] [2021-06-12 21:45:45,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075635483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156088878] [2021-06-12 21:45:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:45,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:45:45,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:45,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:45:45,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:45:45,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:45,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:45,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:50 [2021-06-12 21:45:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:46,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156088878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:46,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371852991] [2021-06-12 21:45:46,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:46,050 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:46,770 INFO L93 Difference]: Finished difference Result 8987 states and 30270 transitions. [2021-06-12 21:45:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:45:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:46,784 INFO L225 Difference]: With dead ends: 8987 [2021-06-12 21:45:46,784 INFO L226 Difference]: Without dead ends: 8962 [2021-06-12 21:45:46,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:45:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-12 21:45:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 7079. [2021-06-12 21:45:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-12 21:45:46,880 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-12 21:45:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:46,880 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-12 21:45:46,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-12 21:45:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:46,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:46,888 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:47,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 21:45:47,089 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1547132172, now seen corresponding path program 82 times [2021-06-12 21:45:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620158437] [2021-06-12 21:45:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:47,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620158437] [2021-06-12 21:45:47,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620158437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605879451] [2021-06-12 21:45:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:47,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:45:47,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:47,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:47,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:47,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:47,457 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:47,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:47,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:47,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:45:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605879451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:47,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:47,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:47,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590737918] [2021-06-12 21:45:47,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:47,506 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:48,501 INFO L93 Difference]: Finished difference Result 9428 states and 31713 transitions. [2021-06-12 21:45:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:45:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:48,516 INFO L225 Difference]: With dead ends: 9428 [2021-06-12 21:45:48,516 INFO L226 Difference]: Without dead ends: 9413 [2021-06-12 21:45:48,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:45:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-06-12 21:45:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7076. [2021-06-12 21:45:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.417950530035336) internal successors, (24182), 7075 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24182 transitions. [2021-06-12 21:45:48,653 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24182 transitions. Word has length 30 [2021-06-12 21:45:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:48,653 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24182 transitions. [2021-06-12 21:45:48,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24182 transitions. [2021-06-12 21:45:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:48,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:48,661 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:48,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-06-12 21:45:48,861 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 790201086, now seen corresponding path program 83 times [2021-06-12 21:45:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:48,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205110518] [2021-06-12 21:45:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:49,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:49,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205110518] [2021-06-12 21:45:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205110518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:49,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694138283] [2021-06-12 21:45:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:49,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:45:49,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:49,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:49,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:49,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:49,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:49,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:49,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:49,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694138283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:49,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:49,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:49,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549587334] [2021-06-12 21:45:49,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:49,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:49,283 INFO L87 Difference]: Start difference. First operand 7076 states and 24182 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:49,722 INFO L93 Difference]: Finished difference Result 8712 states and 29355 transitions. [2021-06-12 21:45:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:45:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:49,734 INFO L225 Difference]: With dead ends: 8712 [2021-06-12 21:45:49,734 INFO L226 Difference]: Without dead ends: 8691 [2021-06-12 21:45:49,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:45:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8691 states. [2021-06-12 21:45:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8691 to 7081. [2021-06-12 21:45:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.418502824858757) internal successors, (24203), 7080 states have internal predecessors, (24203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 24203 transitions. [2021-06-12 21:45:49,830 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 24203 transitions. Word has length 30 [2021-06-12 21:45:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:49,830 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 24203 transitions. [2021-06-12 21:45:49,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 24203 transitions. [2021-06-12 21:45:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:49,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:49,839 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:50,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 21:45:50,039 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 988544462, now seen corresponding path program 84 times [2021-06-12 21:45:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:50,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832575138] [2021-06-12 21:45:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:50,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:50,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832575138] [2021-06-12 21:45:50,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832575138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159181853] [2021-06-12 21:45:50,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:50,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:45:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:45:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:50,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:50,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:45:50,452 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:50,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:50,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:50,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:25 [2021-06-12 21:45:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159181853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:50,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:50,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-12 21:45:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580137642] [2021-06-12 21:45:50,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:45:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:45:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:45:50,528 INFO L87 Difference]: Start difference. First operand 7081 states and 24203 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:52,400 INFO L93 Difference]: Finished difference Result 9784 states and 32690 transitions. [2021-06-12 21:45:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:45:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:52,417 INFO L225 Difference]: With dead ends: 9784 [2021-06-12 21:45:52,417 INFO L226 Difference]: Without dead ends: 9744 [2021-06-12 21:45:52,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1180.6ms TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:45:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-06-12 21:45:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 7077. [2021-06-12 21:45:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.4166195590729225) internal successors, (24176), 7076 states have internal predecessors, (24176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 24176 transitions. [2021-06-12 21:45:52,546 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 24176 transitions. Word has length 30 [2021-06-12 21:45:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:52,546 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 24176 transitions. [2021-06-12 21:45:52,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 24176 transitions. [2021-06-12 21:45:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:52,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:52,586 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:52,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 21:45:52,787 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1508282850, now seen corresponding path program 85 times [2021-06-12 21:45:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:52,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444006318] [2021-06-12 21:45:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:52,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:52,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444006318] [2021-06-12 21:45:52,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444006318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:52,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276144529] [2021-06-12 21:45:52,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:52,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:53,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:53,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:53,146 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:53,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:53,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:53,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:45:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:53,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276144529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:53,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:53,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:53,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417145333] [2021-06-12 21:45:53,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:53,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:53,221 INFO L87 Difference]: Start difference. First operand 7077 states and 24176 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:53,679 INFO L93 Difference]: Finished difference Result 8973 states and 30216 transitions. [2021-06-12 21:45:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:45:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:53,691 INFO L225 Difference]: With dead ends: 8973 [2021-06-12 21:45:53,692 INFO L226 Difference]: Without dead ends: 8938 [2021-06-12 21:45:53,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:45:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-06-12 21:45:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 7076. [2021-06-12 21:45:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.416678445229682) internal successors, (24173), 7075 states have internal predecessors, (24173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24173 transitions. [2021-06-12 21:45:53,793 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24173 transitions. Word has length 30 [2021-06-12 21:45:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24173 transitions. [2021-06-12 21:45:53,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24173 transitions. [2021-06-12 21:45:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:53,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:53,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:54,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:54,002 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1182471836, now seen corresponding path program 86 times [2021-06-12 21:45:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:54,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482525654] [2021-06-12 21:45:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:54,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:54,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482525654] [2021-06-12 21:45:54,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482525654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:54,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346758852] [2021-06-12 21:45:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:54,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:45:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:45:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:54,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:54,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:45:54,351 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:54,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:54,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:54,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:45:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:54,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346758852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:54,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:54,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:45:54,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569200881] [2021-06-12 21:45:54,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:45:54,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:45:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:45:54,398 INFO L87 Difference]: Start difference. First operand 7076 states and 24173 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:56,916 INFO L93 Difference]: Finished difference Result 12654 states and 41623 transitions. [2021-06-12 21:45:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:45:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:56,960 INFO L225 Difference]: With dead ends: 12654 [2021-06-12 21:45:56,960 INFO L226 Difference]: Without dead ends: 12575 [2021-06-12 21:45:56,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1854.0ms TimeCoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:45:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-12 21:45:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 7133. [2021-06-12 21:45:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 3.415171060011217) internal successors, (24357), 7132 states have internal predecessors, (24357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 24357 transitions. [2021-06-12 21:45:57,084 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 24357 transitions. Word has length 30 [2021-06-12 21:45:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:57,084 INFO L482 AbstractCegarLoop]: Abstraction has 7133 states and 24357 transitions. [2021-06-12 21:45:57,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 24357 transitions. [2021-06-12 21:45:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:57,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:57,093 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:57,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:57,293 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -668317764, now seen corresponding path program 87 times [2021-06-12 21:45:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:57,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359687093] [2021-06-12 21:45:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:57,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359687093] [2021-06-12 21:45:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359687093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309728032] [2021-06-12 21:45:57,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:57,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:45:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:45:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:57,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:45:57,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:45:57,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:57,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:45:57,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:65 [2021-06-12 21:45:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:57,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309728032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:57,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:57,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:57,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219304821] [2021-06-12 21:45:57,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:57,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:57,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:57,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:57,730 INFO L87 Difference]: Start difference. First operand 7133 states and 24357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:45:59,104 INFO L93 Difference]: Finished difference Result 10504 states and 34841 transitions. [2021-06-12 21:45:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:45:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:45:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:45:59,119 INFO L225 Difference]: With dead ends: 10504 [2021-06-12 21:45:59,119 INFO L226 Difference]: Without dead ends: 10458 [2021-06-12 21:45:59,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:45:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10458 states. [2021-06-12 21:45:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10458 to 7177. [2021-06-12 21:45:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-12 21:45:59,234 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-12 21:45:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:59,235 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-12 21:45:59,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-12 21:45:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:45:59,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:59,243 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:45:59,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:59,443 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash -221047002, now seen corresponding path program 88 times [2021-06-12 21:45:59,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:59,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546719004] [2021-06-12 21:45:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:59,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546719004] [2021-06-12 21:45:59,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546719004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102302807] [2021-06-12 21:45:59,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:59,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:45:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:45:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:45:59,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:45:59,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:45:59,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:59,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:59,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:59,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:45:59,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102302807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:59,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:59,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:45:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820052196] [2021-06-12 21:45:59,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:45:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:45:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:45:59,876 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:00,861 INFO L93 Difference]: Finished difference Result 8909 states and 29971 transitions. [2021-06-12 21:46:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:46:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:00,874 INFO L225 Difference]: With dead ends: 8909 [2021-06-12 21:46:00,874 INFO L226 Difference]: Without dead ends: 8888 [2021-06-12 21:46:00,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:46:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-06-12 21:46:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7177. [2021-06-12 21:46:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-12 21:46:00,995 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-12 21:46:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:00,995 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-12 21:46:00,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-12 21:46:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:01,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:01,003 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:01,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 21:46:01,205 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 43416822, now seen corresponding path program 89 times [2021-06-12 21:46:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:01,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6651201] [2021-06-12 21:46:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:01,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6651201] [2021-06-12 21:46:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6651201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020875167] [2021-06-12 21:46:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:01,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:46:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:01,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:01,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:46:01,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:46:01,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:01,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:01,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-12 21:46:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:01,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020875167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:01,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:01,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 21:46:01,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158718432] [2021-06-12 21:46:01,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:01,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:01,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:01,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:01,854 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:04,034 INFO L93 Difference]: Finished difference Result 9613 states and 32165 transitions. [2021-06-12 21:46:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:46:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:04,049 INFO L225 Difference]: With dead ends: 9613 [2021-06-12 21:46:04,049 INFO L226 Difference]: Without dead ends: 9533 [2021-06-12 21:46:04,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1685.2ms TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:46:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-12 21:46:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 7204. [2021-06-12 21:46:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.414549493266694) internal successors, (24595), 7203 states have internal predecessors, (24595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 24595 transitions. [2021-06-12 21:46:04,157 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 24595 transitions. Word has length 30 [2021-06-12 21:46:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:04,157 INFO L482 AbstractCegarLoop]: Abstraction has 7204 states and 24595 transitions. [2021-06-12 21:46:04,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 24595 transitions. [2021-06-12 21:46:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:04,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:04,167 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:04,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-12 21:46:04,367 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash -572506508, now seen corresponding path program 90 times [2021-06-12 21:46:04,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731872561] [2021-06-12 21:46:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:04,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731872561] [2021-06-12 21:46:04,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731872561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590006614] [2021-06-12 21:46:04,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:04,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:46:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:04,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:04,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:04,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:46:04,819 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:04,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:04,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:04,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:46:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:04,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590006614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:04,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:04,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872605330] [2021-06-12 21:46:04,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:04,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:04,894 INFO L87 Difference]: Start difference. First operand 7204 states and 24595 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:07,190 INFO L93 Difference]: Finished difference Result 10561 states and 34976 transitions. [2021-06-12 21:46:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:46:07,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:07,205 INFO L225 Difference]: With dead ends: 10561 [2021-06-12 21:46:07,205 INFO L226 Difference]: Without dead ends: 10514 [2021-06-12 21:46:07,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1620.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:46:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-06-12 21:46:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 7197. [2021-06-12 21:46:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.415230683713174) internal successors, (24576), 7196 states have internal predecessors, (24576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 24576 transitions. [2021-06-12 21:46:07,321 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 24576 transitions. Word has length 30 [2021-06-12 21:46:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:07,321 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 24576 transitions. [2021-06-12 21:46:07,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 24576 transitions. [2021-06-12 21:46:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:07,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:07,329 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:07,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-12 21:46:07,530 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash -124071064, now seen corresponding path program 91 times [2021-06-12 21:46:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:07,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566960945] [2021-06-12 21:46:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:07,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566960945] [2021-06-12 21:46:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566960945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480858021] [2021-06-12 21:46:07,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:08,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:08,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:08,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:08,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:08,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480858021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:08,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:08,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:46:08,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473944734] [2021-06-12 21:46:08,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:08,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:08,064 INFO L87 Difference]: Start difference. First operand 7197 states and 24576 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:09,165 INFO L93 Difference]: Finished difference Result 8814 states and 29558 transitions. [2021-06-12 21:46:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:46:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:09,177 INFO L225 Difference]: With dead ends: 8814 [2021-06-12 21:46:09,178 INFO L226 Difference]: Without dead ends: 8788 [2021-06-12 21:46:09,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 879.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:46:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-12 21:46:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7205. [2021-06-12 21:46:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 3.4144919489172683) internal successors, (24598), 7204 states have internal predecessors, (24598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 24598 transitions. [2021-06-12 21:46:09,277 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 24598 transitions. Word has length 30 [2021-06-12 21:46:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:09,277 INFO L482 AbstractCegarLoop]: Abstraction has 7205 states and 24598 transitions. [2021-06-12 21:46:09,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 24598 transitions. [2021-06-12 21:46:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:09,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:09,286 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:09,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:09,486 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1414795236, now seen corresponding path program 92 times [2021-06-12 21:46:09,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:09,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537751040] [2021-06-12 21:46:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:09,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:09,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537751040] [2021-06-12 21:46:09,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537751040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:09,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941935383] [2021-06-12 21:46:09,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:09,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:46:09,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:09,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:09,899 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:09,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:09,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:09,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:46:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:09,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941935383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:09,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:09,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622302230] [2021-06-12 21:46:09,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:09,944 INFO L87 Difference]: Start difference. First operand 7205 states and 24598 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:12,931 INFO L93 Difference]: Finished difference Result 12224 states and 40164 transitions. [2021-06-12 21:46:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 21:46:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:12,948 INFO L225 Difference]: With dead ends: 12224 [2021-06-12 21:46:12,949 INFO L226 Difference]: Without dead ends: 12147 [2021-06-12 21:46:12,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 2319.6ms TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:46:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-06-12 21:46:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 7309. [2021-06-12 21:46:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7308 states have (on average 3.4143404488232076) internal successors, (24952), 7308 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 24952 transitions. [2021-06-12 21:46:13,077 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 24952 transitions. Word has length 30 [2021-06-12 21:46:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:13,077 INFO L482 AbstractCegarLoop]: Abstraction has 7309 states and 24952 transitions. [2021-06-12 21:46:13,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 24952 transitions. [2021-06-12 21:46:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:13,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:13,085 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:13,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:13,286 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:13,286 INFO L82 PathProgramCache]: Analyzing trace with hash 781180196, now seen corresponding path program 93 times [2021-06-12 21:46:13,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:13,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122734340] [2021-06-12 21:46:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:13,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:13,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122734340] [2021-06-12 21:46:13,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122734340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:13,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119130223] [2021-06-12 21:46:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:13,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:46:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:13,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:13,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:13,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:13,643 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:13,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:13,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:13,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:46:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:13,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119130223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:13,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:13,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:46:13,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846027479] [2021-06-12 21:46:13,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:13,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:13,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:13,690 INFO L87 Difference]: Start difference. First operand 7309 states and 24952 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:16,170 INFO L93 Difference]: Finished difference Result 12077 states and 39682 transitions. [2021-06-12 21:46:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 21:46:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:16,187 INFO L225 Difference]: With dead ends: 12077 [2021-06-12 21:46:16,187 INFO L226 Difference]: Without dead ends: 11990 [2021-06-12 21:46:16,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1913.8ms TimeCoverageRelationStatistics Valid=929, Invalid=5077, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:46:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-06-12 21:46:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 7424. [2021-06-12 21:46:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 3.416004310925502) internal successors, (25357), 7423 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 25357 transitions. [2021-06-12 21:46:16,322 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 25357 transitions. Word has length 30 [2021-06-12 21:46:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:16,322 INFO L482 AbstractCegarLoop]: Abstraction has 7424 states and 25357 transitions. [2021-06-12 21:46:16,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 25357 transitions. [2021-06-12 21:46:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:16,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:16,331 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:16,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 21:46:16,531 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1722423664, now seen corresponding path program 94 times [2021-06-12 21:46:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:16,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918832979] [2021-06-12 21:46:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:16,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918832979] [2021-06-12 21:46:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918832979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641377448] [2021-06-12 21:46:16,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:16,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:46:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:17,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:17,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:17,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:17,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641377448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:46:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441825872] [2021-06-12 21:46:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:17,038 INFO L87 Difference]: Start difference. First operand 7424 states and 25357 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:19,329 INFO L93 Difference]: Finished difference Result 10675 states and 35520 transitions. [2021-06-12 21:46:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 21:46:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:19,344 INFO L225 Difference]: With dead ends: 10675 [2021-06-12 21:46:19,345 INFO L226 Difference]: Without dead ends: 10642 [2021-06-12 21:46:19,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1826.8ms TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:46:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10642 states. [2021-06-12 21:46:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10642 to 7435. [2021-06-12 21:46:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7434 states have (on average 3.4170029593758406) internal successors, (25402), 7434 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 25402 transitions. [2021-06-12 21:46:19,460 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 25402 transitions. Word has length 30 [2021-06-12 21:46:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:19,460 INFO L482 AbstractCegarLoop]: Abstraction has 7435 states and 25402 transitions. [2021-06-12 21:46:19,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 25402 transitions. [2021-06-12 21:46:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:19,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:19,469 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:19,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 21:46:19,670 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash 344478350, now seen corresponding path program 95 times [2021-06-12 21:46:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:19,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371046640] [2021-06-12 21:46:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:19,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:19,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371046640] [2021-06-12 21:46:19,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371046640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:19,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013828888] [2021-06-12 21:46:19,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:19,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:46:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:20,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:20,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:20,050 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:20,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:20,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:20,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:46:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:20,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013828888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:20,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:20,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:46:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753505799] [2021-06-12 21:46:20,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:20,103 INFO L87 Difference]: Start difference. First operand 7435 states and 25402 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:21,375 INFO L93 Difference]: Finished difference Result 10176 states and 34003 transitions. [2021-06-12 21:46:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:46:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:21,389 INFO L225 Difference]: With dead ends: 10176 [2021-06-12 21:46:21,390 INFO L226 Difference]: Without dead ends: 10123 [2021-06-12 21:46:21,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 941.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:46:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-06-12 21:46:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 7439. [2021-06-12 21:46:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.4167787039526756) internal successors, (25414), 7438 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 25414 transitions. [2021-06-12 21:46:21,508 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 25414 transitions. Word has length 30 [2021-06-12 21:46:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:21,508 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 25414 transitions. [2021-06-12 21:46:21,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 25414 transitions. [2021-06-12 21:46:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:21,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:21,518 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:21,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:21,718 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2112307908, now seen corresponding path program 96 times [2021-06-12 21:46:21,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:21,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130819991] [2021-06-12 21:46:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:21,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:21,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130819991] [2021-06-12 21:46:21,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130819991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:21,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796169689] [2021-06-12 21:46:21,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:21,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:46:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:22,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:46:22,078 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:22,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:22,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:22,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:46:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:22,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796169689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:22,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:22,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:46:22,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227029377] [2021-06-12 21:46:22,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:46:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:46:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:46:22,174 INFO L87 Difference]: Start difference. First operand 7439 states and 25414 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:22,680 INFO L93 Difference]: Finished difference Result 9163 states and 30845 transitions. [2021-06-12 21:46:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:46:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:22,693 INFO L225 Difference]: With dead ends: 9163 [2021-06-12 21:46:22,694 INFO L226 Difference]: Without dead ends: 9128 [2021-06-12 21:46:22,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:46:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-06-12 21:46:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7444. [2021-06-12 21:46:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.4167674324869006) internal successors, (25431), 7443 states have internal predecessors, (25431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 25431 transitions. [2021-06-12 21:46:22,796 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 25431 transitions. Word has length 30 [2021-06-12 21:46:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:22,796 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 25431 transitions. [2021-06-12 21:46:22,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 25431 transitions. [2021-06-12 21:46:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:22,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:22,804 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:23,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:23,005 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash 697570062, now seen corresponding path program 97 times [2021-06-12 21:46:23,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:23,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103102000] [2021-06-12 21:46:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:23,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103102000] [2021-06-12 21:46:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103102000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329784184] [2021-06-12 21:46:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:23,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:23,416 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:23,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:23,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:23,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:46:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:23,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329784184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:23,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:23,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:46:23,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521390102] [2021-06-12 21:46:23,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:46:23,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:23,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:46:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:46:23,471 INFO L87 Difference]: Start difference. First operand 7444 states and 25431 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:24,063 INFO L93 Difference]: Finished difference Result 9484 states and 31723 transitions. [2021-06-12 21:46:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:46:24,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:24,104 INFO L225 Difference]: With dead ends: 9484 [2021-06-12 21:46:24,104 INFO L226 Difference]: Without dead ends: 9449 [2021-06-12 21:46:24,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:46:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-06-12 21:46:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 7453. [2021-06-12 21:46:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.416935050993022) internal successors, (25463), 7452 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25463 transitions. [2021-06-12 21:46:24,205 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25463 transitions. Word has length 30 [2021-06-12 21:46:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:24,205 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25463 transitions. [2021-06-12 21:46:24,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25463 transitions. [2021-06-12 21:46:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:24,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:24,214 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:24,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:24,417 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash -992372842, now seen corresponding path program 98 times [2021-06-12 21:46:24,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:24,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465982356] [2021-06-12 21:46:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:24,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465982356] [2021-06-12 21:46:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465982356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:24,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817653188] [2021-06-12 21:46:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:24,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:46:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:46:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:24,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:24,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:24,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:24,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:24,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817653188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:24,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:24,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:46:24,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523407416] [2021-06-12 21:46:24,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:46:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:46:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:46:24,847 INFO L87 Difference]: Start difference. First operand 7453 states and 25463 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:25,331 INFO L93 Difference]: Finished difference Result 8692 states and 29282 transitions. [2021-06-12 21:46:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:46:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:25,343 INFO L225 Difference]: With dead ends: 8692 [2021-06-12 21:46:25,344 INFO L226 Difference]: Without dead ends: 8666 [2021-06-12 21:46:25,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:46:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-06-12 21:46:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7455. [2021-06-12 21:46:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4174939629729004) internal successors, (25474), 7454 states have internal predecessors, (25474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25474 transitions. [2021-06-12 21:46:25,443 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25474 transitions. Word has length 30 [2021-06-12 21:46:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:25,444 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25474 transitions. [2021-06-12 21:46:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25474 transitions. [2021-06-12 21:46:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:25,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:25,453 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:25,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-12 21:46:25,655 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 961333420, now seen corresponding path program 99 times [2021-06-12 21:46:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:25,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772570815] [2021-06-12 21:46:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:25,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:25,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772570815] [2021-06-12 21:46:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772570815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:25,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449524140] [2021-06-12 21:46:25,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:25,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:46:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:46:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:26,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:46:26,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:46:26,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:26,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-06-12 21:46:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449524140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:26,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:26,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 21:46:26,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492018493] [2021-06-12 21:46:26,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:26,223 INFO L87 Difference]: Start difference. First operand 7455 states and 25474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:29,005 INFO L93 Difference]: Finished difference Result 9935 states and 33090 transitions. [2021-06-12 21:46:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:46:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:29,020 INFO L225 Difference]: With dead ends: 9935 [2021-06-12 21:46:29,020 INFO L226 Difference]: Without dead ends: 9895 [2021-06-12 21:46:29,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1869.8ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:46:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-12 21:46:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 7459. [2021-06-12 21:46:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7458 states have (on average 3.417538213998391) internal successors, (25488), 7458 states have internal predecessors, (25488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 25488 transitions. [2021-06-12 21:46:29,138 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 25488 transitions. Word has length 30 [2021-06-12 21:46:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:29,139 INFO L482 AbstractCegarLoop]: Abstraction has 7459 states and 25488 transitions. [2021-06-12 21:46:29,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 25488 transitions. [2021-06-12 21:46:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:29,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:29,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:29,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 21:46:29,348 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash -542447488, now seen corresponding path program 100 times [2021-06-12 21:46:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495750427] [2021-06-12 21:46:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:29,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:29,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495750427] [2021-06-12 21:46:29,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495750427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:29,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562434834] [2021-06-12 21:46:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:46:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:29,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:29,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:29,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:29,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:29,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:29,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562434834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:29,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:29,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:46:29,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537462675] [2021-06-12 21:46:29,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:29,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:29,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:29,784 INFO L87 Difference]: Start difference. First operand 7459 states and 25488 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:30,615 INFO L93 Difference]: Finished difference Result 9448 states and 31860 transitions. [2021-06-12 21:46:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:46:30,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:30,629 INFO L225 Difference]: With dead ends: 9448 [2021-06-12 21:46:30,629 INFO L226 Difference]: Without dead ends: 9433 [2021-06-12 21:46:30,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:46:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-12 21:46:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7463. [2021-06-12 21:46:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.4178504422406863) internal successors, (25504), 7462 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 25504 transitions. [2021-06-12 21:46:30,738 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 25504 transitions. Word has length 30 [2021-06-12 21:46:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:30,738 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 25504 transitions. [2021-06-12 21:46:30,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 25504 transitions. [2021-06-12 21:46:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:30,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:30,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:30,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:30,947 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash -796111322, now seen corresponding path program 101 times [2021-06-12 21:46:30,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:30,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750313381] [2021-06-12 21:46:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:31,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:31,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750313381] [2021-06-12 21:46:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750313381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:31,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835849703] [2021-06-12 21:46:31,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:31,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:46:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:31,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:31,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:31,338 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:31,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:31,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:31,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:46:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835849703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:31,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:31,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:46:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181778439] [2021-06-12 21:46:31,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:31,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:31,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:31,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:31,387 INFO L87 Difference]: Start difference. First operand 7463 states and 25504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:32,459 INFO L93 Difference]: Finished difference Result 9840 states and 33135 transitions. [2021-06-12 21:46:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:46:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:32,473 INFO L225 Difference]: With dead ends: 9840 [2021-06-12 21:46:32,473 INFO L226 Difference]: Without dead ends: 9825 [2021-06-12 21:46:32,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:46:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2021-06-12 21:46:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 7460. [2021-06-12 21:46:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 3.417482236224695) internal successors, (25491), 7459 states have internal predecessors, (25491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 25491 transitions. [2021-06-12 21:46:32,584 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 25491 transitions. Word has length 30 [2021-06-12 21:46:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:32,584 INFO L482 AbstractCegarLoop]: Abstraction has 7460 states and 25491 transitions. [2021-06-12 21:46:32,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 25491 transitions. [2021-06-12 21:46:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:32,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:32,593 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:32,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:32,793 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1339332396, now seen corresponding path program 102 times [2021-06-12 21:46:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:32,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768913278] [2021-06-12 21:46:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:32,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:32,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768913278] [2021-06-12 21:46:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768913278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:32,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192505724] [2021-06-12 21:46:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:33,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:46:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:33,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-12 21:46:33,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:46:33,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:33,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:33,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:48 [2021-06-12 21:46:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192505724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:33,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:33,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 21:46:33,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211956005] [2021-06-12 21:46:33,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:33,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:33,317 INFO L87 Difference]: Start difference. First operand 7460 states and 25491 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:35,810 INFO L93 Difference]: Finished difference Result 9693 states and 32346 transitions. [2021-06-12 21:46:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:46:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:35,824 INFO L225 Difference]: With dead ends: 9693 [2021-06-12 21:46:35,824 INFO L226 Difference]: Without dead ends: 9650 [2021-06-12 21:46:35,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1445.6ms TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:46:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-06-12 21:46:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7448. [2021-06-12 21:46:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 3.4157378810259167) internal successors, (25437), 7447 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 25437 transitions. [2021-06-12 21:46:35,940 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 25437 transitions. Word has length 30 [2021-06-12 21:46:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:35,941 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 25437 transitions. [2021-06-12 21:46:35,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 25437 transitions. [2021-06-12 21:46:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:35,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:35,949 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:36,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:36,150 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash -508670674, now seen corresponding path program 103 times [2021-06-12 21:46:36,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:36,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257449080] [2021-06-12 21:46:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:36,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257449080] [2021-06-12 21:46:36,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257449080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078157105] [2021-06-12 21:46:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:36,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:36,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:36,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:36,587 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:36,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:36,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:36,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:46:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:36,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078157105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:36,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:36,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:46:36,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664475308] [2021-06-12 21:46:36,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:36,636 INFO L87 Difference]: Start difference. First operand 7448 states and 25437 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:37,422 INFO L93 Difference]: Finished difference Result 9634 states and 32382 transitions. [2021-06-12 21:46:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:46:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:37,438 INFO L225 Difference]: With dead ends: 9634 [2021-06-12 21:46:37,439 INFO L226 Difference]: Without dead ends: 9615 [2021-06-12 21:46:37,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:46:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-12 21:46:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7445. [2021-06-12 21:46:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.415368081676518) internal successors, (25424), 7444 states have internal predecessors, (25424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 25424 transitions. [2021-06-12 21:46:37,563 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 25424 transitions. Word has length 30 [2021-06-12 21:46:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 7445 states and 25424 transitions. [2021-06-12 21:46:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 25424 transitions. [2021-06-12 21:46:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:37,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:37,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:37,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 21:46:37,774 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1583656386, now seen corresponding path program 104 times [2021-06-12 21:46:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527918659] [2021-06-12 21:46:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:37,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527918659] [2021-06-12 21:46:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527918659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931675636] [2021-06-12 21:46:37,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:37,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:46:37,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:38,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:38,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:38,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:46:38,143 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:38,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:38,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:46:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:38,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931675636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:38,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:38,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:46:38,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436023958] [2021-06-12 21:46:38,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:46:38,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:46:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:46:38,222 INFO L87 Difference]: Start difference. First operand 7445 states and 25424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:39,107 INFO L93 Difference]: Finished difference Result 9544 states and 32087 transitions. [2021-06-12 21:46:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:46:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:39,120 INFO L225 Difference]: With dead ends: 9544 [2021-06-12 21:46:39,121 INFO L226 Difference]: Without dead ends: 9518 [2021-06-12 21:46:39,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:46:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-12 21:46:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7416. [2021-06-12 21:46:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 3.4163182737693862) internal successors, (25332), 7415 states have internal predecessors, (25332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 25332 transitions. [2021-06-12 21:46:39,230 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 25332 transitions. Word has length 30 [2021-06-12 21:46:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:39,230 INFO L482 AbstractCegarLoop]: Abstraction has 7416 states and 25332 transitions. [2021-06-12 21:46:39,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 25332 transitions. [2021-06-12 21:46:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:39,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:39,239 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:39,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:39,441 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash -416146950, now seen corresponding path program 105 times [2021-06-12 21:46:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:39,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186296255] [2021-06-12 21:46:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:39,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:39,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186296255] [2021-06-12 21:46:39,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186296255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:39,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065302196] [2021-06-12 21:46:39,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:39,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:46:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:39,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:46:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:39,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:39,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:39,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:46:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:39,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065302196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:39,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:39,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:46:39,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489999174] [2021-06-12 21:46:39,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:46:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:46:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:46:39,876 INFO L87 Difference]: Start difference. First operand 7416 states and 25332 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:41,210 INFO L93 Difference]: Finished difference Result 9828 states and 32975 transitions. [2021-06-12 21:46:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:46:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:41,224 INFO L225 Difference]: With dead ends: 9828 [2021-06-12 21:46:41,224 INFO L226 Difference]: Without dead ends: 9778 [2021-06-12 21:46:41,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 972.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:46:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-12 21:46:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7415. [2021-06-12 21:46:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 3.4136768276234153) internal successors, (25309), 7414 states have internal predecessors, (25309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 25309 transitions. [2021-06-12 21:46:41,340 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 25309 transitions. Word has length 30 [2021-06-12 21:46:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:41,340 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 25309 transitions. [2021-06-12 21:46:41,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 25309 transitions. [2021-06-12 21:46:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:41,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:41,349 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:41,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:41,549 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 519931620, now seen corresponding path program 106 times [2021-06-12 21:46:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:41,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684276624] [2021-06-12 21:46:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:41,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684276624] [2021-06-12 21:46:41,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684276624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631345737] [2021-06-12 21:46:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:41,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:46:41,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:41,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:41,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:41,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:41,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:41,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631345737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:42,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:42,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207566253] [2021-06-12 21:46:42,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:42,000 INFO L87 Difference]: Start difference. First operand 7415 states and 25309 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:42,738 INFO L93 Difference]: Finished difference Result 9105 states and 30683 transitions. [2021-06-12 21:46:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:46:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:42,751 INFO L225 Difference]: With dead ends: 9105 [2021-06-12 21:46:42,751 INFO L226 Difference]: Without dead ends: 9083 [2021-06-12 21:46:42,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:46:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-06-12 21:46:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 7434. [2021-06-12 21:46:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7433 states have (on average 3.4138302166016414) internal successors, (25375), 7433 states have internal predecessors, (25375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 25375 transitions. [2021-06-12 21:46:42,853 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 25375 transitions. Word has length 30 [2021-06-12 21:46:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:42,853 INFO L482 AbstractCegarLoop]: Abstraction has 7434 states and 25375 transitions. [2021-06-12 21:46:42,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 25375 transitions. [2021-06-12 21:46:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:42,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:42,862 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:43,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-06-12 21:46:43,062 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1969487540, now seen corresponding path program 107 times [2021-06-12 21:46:43,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:43,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859926405] [2021-06-12 21:46:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:43,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:43,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859926405] [2021-06-12 21:46:43,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859926405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:43,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189991630] [2021-06-12 21:46:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:43,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:46:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:43,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:43,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:43,451 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:43,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:43,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:43,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:46:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:43,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189991630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:43,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:43,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208052468] [2021-06-12 21:46:43,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:43,500 INFO L87 Difference]: Start difference. First operand 7434 states and 25375 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:44,450 INFO L93 Difference]: Finished difference Result 9842 states and 33046 transitions. [2021-06-12 21:46:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:46:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:44,465 INFO L225 Difference]: With dead ends: 9842 [2021-06-12 21:46:44,465 INFO L226 Difference]: Without dead ends: 9816 [2021-06-12 21:46:44,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 716.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:46:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-12 21:46:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7432. [2021-06-12 21:46:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.4128650248957073) internal successors, (25361), 7431 states have internal predecessors, (25361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 25361 transitions. [2021-06-12 21:46:44,604 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 25361 transitions. Word has length 30 [2021-06-12 21:46:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:44,604 INFO L482 AbstractCegarLoop]: Abstraction has 7432 states and 25361 transitions. [2021-06-12 21:46:44,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 25361 transitions. [2021-06-12 21:46:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:44,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:44,612 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:44,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:44,813 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1689012902, now seen corresponding path program 108 times [2021-06-12 21:46:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:44,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002831453] [2021-06-12 21:46:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:44,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002831453] [2021-06-12 21:46:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002831453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623382603] [2021-06-12 21:46:44,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:45,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:46:45,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:45,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:46:45,155 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:45,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:45,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:45,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:46:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:45,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623382603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:45,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:45,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:46:45,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565535910] [2021-06-12 21:46:45,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:45,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:45,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:45,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:45,222 INFO L87 Difference]: Start difference. First operand 7432 states and 25361 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:46,462 INFO L93 Difference]: Finished difference Result 9757 states and 32809 transitions. [2021-06-12 21:46:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:46:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:46,478 INFO L225 Difference]: With dead ends: 9757 [2021-06-12 21:46:46,478 INFO L226 Difference]: Without dead ends: 9713 [2021-06-12 21:46:46,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 936.3ms TimeCoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:46:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9713 states. [2021-06-12 21:46:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9713 to 7399. [2021-06-12 21:46:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.4138956474722897) internal successors, (25256), 7398 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 25256 transitions. [2021-06-12 21:46:46,614 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 25256 transitions. Word has length 30 [2021-06-12 21:46:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:46,614 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 25256 transitions. [2021-06-12 21:46:46,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 25256 transitions. [2021-06-12 21:46:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:46,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:46,623 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:46,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:46,823 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1746001132, now seen corresponding path program 109 times [2021-06-12 21:46:46,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:46,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658084966] [2021-06-12 21:46:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:47,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:47,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658084966] [2021-06-12 21:46:47,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658084966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:47,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998826126] [2021-06-12 21:46:47,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:47,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:47,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:47,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:47,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:47,192 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:47,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:47,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:47,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:46:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:47,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998826126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:47,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:47,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:47,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80613521] [2021-06-12 21:46:47,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:47,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:47,273 INFO L87 Difference]: Start difference. First operand 7399 states and 25256 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:48,263 INFO L93 Difference]: Finished difference Result 9549 states and 32090 transitions. [2021-06-12 21:46:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:46:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:48,279 INFO L225 Difference]: With dead ends: 9549 [2021-06-12 21:46:48,279 INFO L226 Difference]: Without dead ends: 9511 [2021-06-12 21:46:48,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:46:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-06-12 21:46:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7411. [2021-06-12 21:46:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.414574898785425) internal successors, (25302), 7410 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25302 transitions. [2021-06-12 21:46:48,422 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25302 transitions. Word has length 30 [2021-06-12 21:46:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:48,422 INFO L482 AbstractCegarLoop]: Abstraction has 7411 states and 25302 transitions. [2021-06-12 21:46:48,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25302 transitions. [2021-06-12 21:46:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:48,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:48,432 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:48,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:48,632 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 298416662, now seen corresponding path program 110 times [2021-06-12 21:46:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:48,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729782954] [2021-06-12 21:46:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:48,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:48,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729782954] [2021-06-12 21:46:48,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729782954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:48,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790009024] [2021-06-12 21:46:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:48,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:46:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:49,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:49,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:49,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:49,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:49,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:49,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-12 21:46:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:49,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790009024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:49,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:49,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:46:49,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356498188] [2021-06-12 21:46:49,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:49,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:49,111 INFO L87 Difference]: Start difference. First operand 7411 states and 25302 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:50,247 INFO L93 Difference]: Finished difference Result 9078 states and 30424 transitions. [2021-06-12 21:46:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:46:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:50,260 INFO L225 Difference]: With dead ends: 9078 [2021-06-12 21:46:50,260 INFO L226 Difference]: Without dead ends: 9045 [2021-06-12 21:46:50,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:46:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-06-12 21:46:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 7438. [2021-06-12 21:46:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.412800860562055) internal successors, (25381), 7437 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25381 transitions. [2021-06-12 21:46:50,387 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25381 transitions. Word has length 30 [2021-06-12 21:46:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:50,387 INFO L482 AbstractCegarLoop]: Abstraction has 7438 states and 25381 transitions. [2021-06-12 21:46:50,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25381 transitions. [2021-06-12 21:46:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:50,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:50,396 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:50,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-12 21:46:50,596 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1937279850, now seen corresponding path program 111 times [2021-06-12 21:46:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825588517] [2021-06-12 21:46:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:50,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:50,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825588517] [2021-06-12 21:46:50,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825588517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:50,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054776605] [2021-06-12 21:46:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:50,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:46:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:46:50,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:51,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:51,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:51,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:51,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:51,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054776605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:51,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:51,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:46:51,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895490758] [2021-06-12 21:46:51,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:46:51,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:46:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:46:51,066 INFO L87 Difference]: Start difference. First operand 7438 states and 25381 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:52,749 INFO L93 Difference]: Finished difference Result 9393 states and 31341 transitions. [2021-06-12 21:46:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:46:52,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:52,762 INFO L225 Difference]: With dead ends: 9393 [2021-06-12 21:46:52,762 INFO L226 Difference]: Without dead ends: 9360 [2021-06-12 21:46:52,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:46:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-06-12 21:46:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 7433. [2021-06-12 21:46:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.4122712594187297) internal successors, (25360), 7432 states have internal predecessors, (25360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 25360 transitions. [2021-06-12 21:46:52,866 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 25360 transitions. Word has length 30 [2021-06-12 21:46:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:52,866 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 25360 transitions. [2021-06-12 21:46:52,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 25360 transitions. [2021-06-12 21:46:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:52,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:52,876 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:53,076 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1168264038, now seen corresponding path program 112 times [2021-06-12 21:46:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104970884] [2021-06-12 21:46:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:53,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104970884] [2021-06-12 21:46:53,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104970884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:53,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382637444] [2021-06-12 21:46:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:53,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:46:53,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:53,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:53,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:53,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:53,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:53,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:53,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:53,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:53,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382637444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:53,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:53,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 21:46:53,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712313646] [2021-06-12 21:46:53,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:46:53,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:46:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:46:53,535 INFO L87 Difference]: Start difference. First operand 7433 states and 25360 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:53,986 INFO L93 Difference]: Finished difference Result 7974 states and 26897 transitions. [2021-06-12 21:46:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:46:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:53,998 INFO L225 Difference]: With dead ends: 7974 [2021-06-12 21:46:53,998 INFO L226 Difference]: Without dead ends: 7948 [2021-06-12 21:46:53,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:46:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-06-12 21:46:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7410. [2021-06-12 21:46:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4130112025914427) internal successors, (25287), 7409 states have internal predecessors, (25287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25287 transitions. [2021-06-12 21:46:54,138 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25287 transitions. Word has length 30 [2021-06-12 21:46:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:54,139 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25287 transitions. [2021-06-12 21:46:54,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25287 transitions. [2021-06-12 21:46:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:54,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:54,147 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:54,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:54,347 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1252420240, now seen corresponding path program 113 times [2021-06-12 21:46:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:54,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330227414] [2021-06-12 21:46:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:54,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:54,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330227414] [2021-06-12 21:46:54,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330227414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:54,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285845236] [2021-06-12 21:46:54,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:54,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:46:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:46:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:54,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:46:54,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:54,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:54,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:54,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:54,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:46:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285845236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:54,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:54,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:46:54,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367566348] [2021-06-12 21:46:54,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:46:54,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:54,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:46:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:46:54,785 INFO L87 Difference]: Start difference. First operand 7410 states and 25287 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:55,930 INFO L93 Difference]: Finished difference Result 9196 states and 30718 transitions. [2021-06-12 21:46:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:46:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:55,943 INFO L225 Difference]: With dead ends: 9196 [2021-06-12 21:46:55,943 INFO L226 Difference]: Without dead ends: 9170 [2021-06-12 21:46:55,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 914.2ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:46:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-06-12 21:46:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7390. [2021-06-12 21:46:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 3.4141291108404386) internal successors, (25227), 7389 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 25227 transitions. [2021-06-12 21:46:56,070 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 25227 transitions. Word has length 30 [2021-06-12 21:46:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:56,070 INFO L482 AbstractCegarLoop]: Abstraction has 7390 states and 25227 transitions. [2021-06-12 21:46:56,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 25227 transitions. [2021-06-12 21:46:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:56,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:56,079 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:56,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-12 21:46:56,279 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1782395603, now seen corresponding path program 34 times [2021-06-12 21:46:56,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:56,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132125202] [2021-06-12 21:46:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:56,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:56,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132125202] [2021-06-12 21:46:56,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132125202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:56,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336609211] [2021-06-12 21:46:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:56,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:46:56,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:46:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:56,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:46:56,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:46:56,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:56,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:56,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:46:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336609211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:56,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:56,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:46:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359115554] [2021-06-12 21:46:56,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:46:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:46:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:46:56,495 INFO L87 Difference]: Start difference. First operand 7390 states and 25227 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:56,639 INFO L93 Difference]: Finished difference Result 8178 states and 27562 transitions. [2021-06-12 21:46:56,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:46:56,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:56,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:56,650 INFO L225 Difference]: With dead ends: 8178 [2021-06-12 21:46:56,650 INFO L226 Difference]: Without dead ends: 8092 [2021-06-12 21:46:56,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:46:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-06-12 21:46:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7410. [2021-06-12 21:46:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4105817249291404) internal successors, (25269), 7409 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25269 transitions. [2021-06-12 21:46:56,745 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25269 transitions. Word has length 30 [2021-06-12 21:46:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:56,746 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25269 transitions. [2021-06-12 21:46:56,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25269 transitions. [2021-06-12 21:46:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:56,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:56,754 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:56,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:56,955 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1423069146, now seen corresponding path program 114 times [2021-06-12 21:46:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:56,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835842473] [2021-06-12 21:46:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:46:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:57,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:46:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835842473] [2021-06-12 21:46:57,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835842473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284228274] [2021-06-12 21:46:57,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:57,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:46:57,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:46:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:46:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:46:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:46:57,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:57,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:46:57,361 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:46:57,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:46:57,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:46:57,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:46:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:46:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284228274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:46:57,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:46:57,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:46:57,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453221098] [2021-06-12 21:46:57,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:46:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:46:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:46:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:46:57,408 INFO L87 Difference]: Start difference. First operand 7410 states and 25269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:46:59,411 INFO L93 Difference]: Finished difference Result 11711 states and 38605 transitions. [2021-06-12 21:46:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 21:46:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:46:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:46:59,428 INFO L225 Difference]: With dead ends: 11711 [2021-06-12 21:46:59,428 INFO L226 Difference]: Without dead ends: 11656 [2021-06-12 21:46:59,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1609.6ms TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:46:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-06-12 21:46:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 7487. [2021-06-12 21:46:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 3.41170184344109) internal successors, (25540), 7486 states have internal predecessors, (25540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 25540 transitions. [2021-06-12 21:46:59,558 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 25540 transitions. Word has length 30 [2021-06-12 21:46:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:46:59,558 INFO L482 AbstractCegarLoop]: Abstraction has 7487 states and 25540 transitions. [2021-06-12 21:46:59,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:46:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 25540 transitions. [2021-06-12 21:46:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:46:59,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:46:59,567 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:46:59,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:46:59,768 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:46:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:46:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1640634574, now seen corresponding path program 115 times [2021-06-12 21:46:59,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:46:59,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781542481] [2021-06-12 21:46:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:46:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:00,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:00,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781542481] [2021-06-12 21:47:00,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781542481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:00,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474715960] [2021-06-12 21:47:00,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:00,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:47:00,197 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:00,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:00,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:00,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:47:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:00,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474715960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:00,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:00,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:47:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745289876] [2021-06-12 21:47:00,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:00,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:00,245 INFO L87 Difference]: Start difference. First operand 7487 states and 25540 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:01,730 INFO L93 Difference]: Finished difference Result 10792 states and 35822 transitions. [2021-06-12 21:47:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:47:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:01,746 INFO L225 Difference]: With dead ends: 10792 [2021-06-12 21:47:01,746 INFO L226 Difference]: Without dead ends: 10735 [2021-06-12 21:47:01,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1299.5ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:47:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-06-12 21:47:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7475. [2021-06-12 21:47:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.409017928819909) internal successors, (25479), 7474 states have internal predecessors, (25479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 25479 transitions. [2021-06-12 21:47:01,885 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 25479 transitions. Word has length 30 [2021-06-12 21:47:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:01,885 INFO L482 AbstractCegarLoop]: Abstraction has 7475 states and 25479 transitions. [2021-06-12 21:47:01,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 25479 transitions. [2021-06-12 21:47:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:01,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:01,894 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:02,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:02,094 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:02,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1876404162, now seen corresponding path program 116 times [2021-06-12 21:47:02,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:02,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243668435] [2021-06-12 21:47:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:02,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:02,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243668435] [2021-06-12 21:47:02,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243668435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:02,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054446474] [2021-06-12 21:47:02,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:02,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:47:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:02,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:02,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:47:02,468 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:02,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:02,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:02,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:47:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:02,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054446474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:02,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:02,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:47:02,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742487114] [2021-06-12 21:47:02,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:02,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:02,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:02,545 INFO L87 Difference]: Start difference. First operand 7475 states and 25479 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:03,521 INFO L93 Difference]: Finished difference Result 9562 states and 32103 transitions. [2021-06-12 21:47:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:47:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:03,535 INFO L225 Difference]: With dead ends: 9562 [2021-06-12 21:47:03,535 INFO L226 Difference]: Without dead ends: 9491 [2021-06-12 21:47:03,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 709.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:47:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-12 21:47:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7458. [2021-06-12 21:47:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.408072951589111) internal successors, (25414), 7457 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 25414 transitions. [2021-06-12 21:47:03,668 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 25414 transitions. Word has length 30 [2021-06-12 21:47:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:03,668 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 25414 transitions. [2021-06-12 21:47:03,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 25414 transitions. [2021-06-12 21:47:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:03,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:03,676 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:03,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-12 21:47:03,877 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash 54174113, now seen corresponding path program 35 times [2021-06-12 21:47:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:03,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916277800] [2021-06-12 21:47:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:03,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916277800] [2021-06-12 21:47:03,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916277800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838652614] [2021-06-12 21:47:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:04,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:47:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:47:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:04,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:04,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:04,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:04,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:04,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:47:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:04,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838652614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:04,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:04,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 21:47:04,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369492472] [2021-06-12 21:47:04,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:47:04,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:47:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:47:04,116 INFO L87 Difference]: Start difference. First operand 7458 states and 25414 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:04,301 INFO L93 Difference]: Finished difference Result 7805 states and 26445 transitions. [2021-06-12 21:47:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:47:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:04,312 INFO L225 Difference]: With dead ends: 7805 [2021-06-12 21:47:04,312 INFO L226 Difference]: Without dead ends: 7774 [2021-06-12 21:47:04,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:47:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-12 21:47:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7430. [2021-06-12 21:47:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.4109570601696055) internal successors, (25340), 7429 states have internal predecessors, (25340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 25340 transitions. [2021-06-12 21:47:04,407 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 25340 transitions. Word has length 30 [2021-06-12 21:47:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 25340 transitions. [2021-06-12 21:47:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 25340 transitions. [2021-06-12 21:47:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:04,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:04,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:04,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:04,616 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2093501780, now seen corresponding path program 117 times [2021-06-12 21:47:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:04,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347724042] [2021-06-12 21:47:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:04,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347724042] [2021-06-12 21:47:04,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347724042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557365072] [2021-06-12 21:47:04,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:04,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:47:04,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:47:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:47:05,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:05,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:05,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:05,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:05,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:47:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:05,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557365072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:05,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:05,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:47:05,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275158159] [2021-06-12 21:47:05,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:47:05,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:47:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:47:05,073 INFO L87 Difference]: Start difference. First operand 7430 states and 25340 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:05,983 INFO L93 Difference]: Finished difference Result 9193 states and 30704 transitions. [2021-06-12 21:47:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:47:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:05,997 INFO L225 Difference]: With dead ends: 9193 [2021-06-12 21:47:05,997 INFO L226 Difference]: Without dead ends: 9160 [2021-06-12 21:47:05,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 805.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:47:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-06-12 21:47:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7443. [2021-06-12 21:47:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.4106423004568662) internal successors, (25382), 7442 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 25382 transitions. [2021-06-12 21:47:06,109 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 25382 transitions. Word has length 30 [2021-06-12 21:47:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:06,109 INFO L482 AbstractCegarLoop]: Abstraction has 7443 states and 25382 transitions. [2021-06-12 21:47:06,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 25382 transitions. [2021-06-12 21:47:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:06,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:06,118 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:06,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:06,318 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash 769171052, now seen corresponding path program 118 times [2021-06-12 21:47:06,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:06,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344425584] [2021-06-12 21:47:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:06,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:06,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344425584] [2021-06-12 21:47:06,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344425584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:06,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524531624] [2021-06-12 21:47:06,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:06,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:47:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:06,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:47:06,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:06,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:06,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:06,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:06,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:47:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524531624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:06,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:06,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:47:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976318001] [2021-06-12 21:47:06,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:06,783 INFO L87 Difference]: Start difference. First operand 7443 states and 25382 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:08,273 INFO L93 Difference]: Finished difference Result 9705 states and 32422 transitions. [2021-06-12 21:47:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:47:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:08,287 INFO L225 Difference]: With dead ends: 9705 [2021-06-12 21:47:08,287 INFO L226 Difference]: Without dead ends: 9672 [2021-06-12 21:47:08,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:47:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-06-12 21:47:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7455. [2021-06-12 21:47:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4097129058223774) internal successors, (25416), 7454 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25416 transitions. [2021-06-12 21:47:08,397 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25416 transitions. Word has length 30 [2021-06-12 21:47:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:08,397 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25416 transitions. [2021-06-12 21:47:08,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25416 transitions. [2021-06-12 21:47:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:08,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:08,406 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:08,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-12 21:47:08,606 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2080023144, now seen corresponding path program 119 times [2021-06-12 21:47:08,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:08,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994197302] [2021-06-12 21:47:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:08,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994197302] [2021-06-12 21:47:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994197302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470043595] [2021-06-12 21:47:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:08,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:47:08,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:47:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:09,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-12 21:47:09,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:47:09,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:09,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:09,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-06-12 21:47:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:09,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470043595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:09,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:09,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:47:09,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93311455] [2021-06-12 21:47:09,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:47:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:47:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:47:09,165 INFO L87 Difference]: Start difference. First operand 7455 states and 25416 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:11,372 INFO L93 Difference]: Finished difference Result 10824 states and 35717 transitions. [2021-06-12 21:47:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:47:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:11,389 INFO L225 Difference]: With dead ends: 10824 [2021-06-12 21:47:11,389 INFO L226 Difference]: Without dead ends: 10757 [2021-06-12 21:47:11,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1507.4ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:47:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-06-12 21:47:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 7452. [2021-06-12 21:47:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 7451 states have (on average 3.410146289088713) internal successors, (25409), 7451 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 25409 transitions. [2021-06-12 21:47:11,509 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 25409 transitions. Word has length 30 [2021-06-12 21:47:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:11,509 INFO L482 AbstractCegarLoop]: Abstraction has 7452 states and 25409 transitions. [2021-06-12 21:47:11,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 25409 transitions. [2021-06-12 21:47:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:11,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:11,518 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:11,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:11,719 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash 169988712, now seen corresponding path program 120 times [2021-06-12 21:47:11,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:11,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187977734] [2021-06-12 21:47:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187977734] [2021-06-12 21:47:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187977734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252537097] [2021-06-12 21:47:11,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:11,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:47:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:47:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:12,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:12,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:47:12,157 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:12,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:12,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:12,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:47:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252537097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:12,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:12,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:47:12,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579039291] [2021-06-12 21:47:12,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:47:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:47:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:47:12,208 INFO L87 Difference]: Start difference. First operand 7452 states and 25409 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:15,382 INFO L93 Difference]: Finished difference Result 11741 states and 38704 transitions. [2021-06-12 21:47:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 21:47:15,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:15,398 INFO L225 Difference]: With dead ends: 11741 [2021-06-12 21:47:15,398 INFO L226 Difference]: Without dead ends: 11682 [2021-06-12 21:47:15,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2601.8ms TimeCoverageRelationStatistics Valid=1148, Invalid=6508, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 21:47:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-06-12 21:47:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7513. [2021-06-12 21:47:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 3.413738019169329) internal successors, (25644), 7512 states have internal predecessors, (25644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 25644 transitions. [2021-06-12 21:47:15,519 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 25644 transitions. Word has length 30 [2021-06-12 21:47:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:15,519 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 25644 transitions. [2021-06-12 21:47:15,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 25644 transitions. [2021-06-12 21:47:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:15,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:15,528 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:15,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-12 21:47:15,728 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1544008528, now seen corresponding path program 121 times [2021-06-12 21:47:15,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:15,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140034710] [2021-06-12 21:47:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:15,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:15,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140034710] [2021-06-12 21:47:15,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140034710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:15,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995612895] [2021-06-12 21:47:15,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:47:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:16,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:47:16,090 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:16,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:16,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:16,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:47:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995612895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:16,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:16,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:47:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101031846] [2021-06-12 21:47:16,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:47:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:47:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:47:16,156 INFO L87 Difference]: Start difference. First operand 7513 states and 25644 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:17,242 INFO L93 Difference]: Finished difference Result 11967 states and 39772 transitions. [2021-06-12 21:47:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:47:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:17,260 INFO L225 Difference]: With dead ends: 11967 [2021-06-12 21:47:17,260 INFO L226 Difference]: Without dead ends: 11882 [2021-06-12 21:47:17,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:47:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11882 states. [2021-06-12 21:47:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11882 to 7506. [2021-06-12 21:47:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 3.4131912058627583) internal successors, (25616), 7505 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 25616 transitions. [2021-06-12 21:47:17,384 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 25616 transitions. Word has length 30 [2021-06-12 21:47:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:17,384 INFO L482 AbstractCegarLoop]: Abstraction has 7506 states and 25616 transitions. [2021-06-12 21:47:17,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 25616 transitions. [2021-06-12 21:47:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:17,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:17,393 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:17,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:17,594 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1726792916, now seen corresponding path program 122 times [2021-06-12 21:47:17,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:17,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730992804] [2021-06-12 21:47:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:17,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730992804] [2021-06-12 21:47:17,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730992804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:17,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487307457] [2021-06-12 21:47:17,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:17,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:47:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:17,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:47:17,954 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:17,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:17,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:17,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-12 21:47:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:18,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487307457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:18,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:18,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:47:18,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525182668] [2021-06-12 21:47:18,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:47:18,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:47:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:47:18,021 INFO L87 Difference]: Start difference. First operand 7506 states and 25616 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:20,291 INFO L93 Difference]: Finished difference Result 12586 states and 41642 transitions. [2021-06-12 21:47:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:47:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:20,310 INFO L225 Difference]: With dead ends: 12586 [2021-06-12 21:47:20,310 INFO L226 Difference]: Without dead ends: 12498 [2021-06-12 21:47:20,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1741.1ms TimeCoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:47:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-06-12 21:47:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7581. [2021-06-12 21:47:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 7580 states have (on average 3.4108179419525064) internal successors, (25854), 7580 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 25854 transitions. [2021-06-12 21:47:20,452 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 25854 transitions. Word has length 30 [2021-06-12 21:47:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:20,452 INFO L482 AbstractCegarLoop]: Abstraction has 7581 states and 25854 transitions. [2021-06-12 21:47:20,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 25854 transitions. [2021-06-12 21:47:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:20,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:20,461 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:20,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:20,661 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash -197397320, now seen corresponding path program 123 times [2021-06-12 21:47:20,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:20,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152460428] [2021-06-12 21:47:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:20,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152460428] [2021-06-12 21:47:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152460428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138635306] [2021-06-12 21:47:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:20,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:47:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:47:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:21,159 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 21:47:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 48 [2021-06-12 21:47:21,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:21,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:21,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:21,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:3 [2021-06-12 21:47:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:21,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138635306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:21,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:21,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:47:21,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117414242] [2021-06-12 21:47:21,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:21,196 INFO L87 Difference]: Start difference. First operand 7581 states and 25854 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:25,322 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 21:47:25,823 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-12 21:47:25,989 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 21:47:27,090 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-12 21:47:27,346 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-12 21:47:27,709 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-12 21:47:27,889 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 21:47:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:32,390 INFO L93 Difference]: Finished difference Result 10935 states and 36351 transitions. [2021-06-12 21:47:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 21:47:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:32,406 INFO L225 Difference]: With dead ends: 10935 [2021-06-12 21:47:32,406 INFO L226 Difference]: Without dead ends: 10909 [2021-06-12 21:47:32,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 6116.7ms TimeCoverageRelationStatistics Valid=713, Invalid=3978, Unknown=1, NotChecked=0, Total=4692 [2021-06-12 21:47:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-12 21:47:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7589. [2021-06-12 21:47:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.411834475487612) internal successors, (25889), 7588 states have internal predecessors, (25889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25889 transitions. [2021-06-12 21:47:32,525 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25889 transitions. Word has length 30 [2021-06-12 21:47:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:32,525 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25889 transitions. [2021-06-12 21:47:32,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25889 transitions. [2021-06-12 21:47:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:32,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:32,534 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:32,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-12 21:47:32,734 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 262838404, now seen corresponding path program 124 times [2021-06-12 21:47:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:32,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528917243] [2021-06-12 21:47:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:33,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:33,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528917243] [2021-06-12 21:47:33,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528917243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:33,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84790680] [2021-06-12 21:47:33,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:33,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:47:33,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:33,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:33,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:47:33,820 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:33,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:33,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:33,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:47:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:34,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84790680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:34,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:34,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:47:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936392966] [2021-06-12 21:47:34,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:47:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:47:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:47:34,005 INFO L87 Difference]: Start difference. First operand 7589 states and 25889 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:35,489 INFO L93 Difference]: Finished difference Result 9231 states and 31088 transitions. [2021-06-12 21:47:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:47:35,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:35,504 INFO L225 Difference]: With dead ends: 9231 [2021-06-12 21:47:35,504 INFO L226 Difference]: Without dead ends: 9196 [2021-06-12 21:47:35,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1501.3ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:47:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-12 21:47:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7585. [2021-06-12 21:47:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.411260548523207) internal successors, (25871), 7584 states have internal predecessors, (25871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 25871 transitions. [2021-06-12 21:47:35,635 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 25871 transitions. Word has length 30 [2021-06-12 21:47:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:35,635 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 25871 transitions. [2021-06-12 21:47:35,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 25871 transitions. [2021-06-12 21:47:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:35,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:35,644 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:35,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:35,844 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1222250922, now seen corresponding path program 125 times [2021-06-12 21:47:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:35,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420164003] [2021-06-12 21:47:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:36,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420164003] [2021-06-12 21:47:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420164003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:36,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274581671] [2021-06-12 21:47:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:36,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:47:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:47:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:36,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:36,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:47:36,955 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:36,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:36,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:36,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:47:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:37,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274581671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:37,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:37,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:47:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704326795] [2021-06-12 21:47:37,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:47:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:47:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:47:37,080 INFO L87 Difference]: Start difference. First operand 7585 states and 25871 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:39,654 INFO L93 Difference]: Finished difference Result 9670 states and 32321 transitions. [2021-06-12 21:47:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:47:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:39,669 INFO L225 Difference]: With dead ends: 9670 [2021-06-12 21:47:39,669 INFO L226 Difference]: Without dead ends: 9635 [2021-06-12 21:47:39,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1768.6ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:47:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-06-12 21:47:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 7577. [2021-06-12 21:47:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.4107708553326295) internal successors, (25840), 7576 states have internal predecessors, (25840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25840 transitions. [2021-06-12 21:47:39,789 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25840 transitions. Word has length 30 [2021-06-12 21:47:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:39,789 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25840 transitions. [2021-06-12 21:47:39,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25840 transitions. [2021-06-12 21:47:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:39,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:39,799 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:39,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-12 21:47:39,999 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1382773470, now seen corresponding path program 126 times [2021-06-12 21:47:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:39,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664345490] [2021-06-12 21:47:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:40,392 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-06-12 21:47:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664345490] [2021-06-12 21:47:40,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664345490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:40,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144495143] [2021-06-12 21:47:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:40,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:47:40,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:47:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:41,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:47:41,190 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:47:41,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:41,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:41,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:47:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144495143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:41,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:41,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:47:41,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129480658] [2021-06-12 21:47:41,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:41,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:41,392 INFO L87 Difference]: Start difference. First operand 7577 states and 25840 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:42,316 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-12 21:47:42,634 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-12 21:47:42,986 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-12 21:47:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:45,597 INFO L93 Difference]: Finished difference Result 9586 states and 32012 transitions. [2021-06-12 21:47:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:47:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:45,611 INFO L225 Difference]: With dead ends: 9586 [2021-06-12 21:47:45,611 INFO L226 Difference]: Without dead ends: 9518 [2021-06-12 21:47:45,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3013.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:47:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-12 21:47:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7570. [2021-06-12 21:47:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 3.4089047430307833) internal successors, (25802), 7569 states have internal predecessors, (25802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 25802 transitions. [2021-06-12 21:47:45,752 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 25802 transitions. Word has length 30 [2021-06-12 21:47:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:45,752 INFO L482 AbstractCegarLoop]: Abstraction has 7570 states and 25802 transitions. [2021-06-12 21:47:45,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 25802 transitions. [2021-06-12 21:47:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:45,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:45,760 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:45,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:45,961 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash -692066666, now seen corresponding path program 127 times [2021-06-12 21:47:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:45,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033082103] [2021-06-12 21:47:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:46,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033082103] [2021-06-12 21:47:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033082103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075866040] [2021-06-12 21:47:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:47:46,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:47,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:47,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:47:47,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:47,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:47,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:47,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:47,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:47:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075866040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:47:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642424416] [2021-06-12 21:47:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:47:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:47:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:47:47,164 INFO L87 Difference]: Start difference. First operand 7570 states and 25802 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:47,559 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-12 21:47:47,787 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-12 21:47:48,875 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-12 21:47:49,416 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-06-12 21:47:49,850 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-06-12 21:47:51,853 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-12 21:47:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:52,540 INFO L93 Difference]: Finished difference Result 11143 states and 37083 transitions. [2021-06-12 21:47:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:47:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:52,557 INFO L225 Difference]: With dead ends: 11143 [2021-06-12 21:47:52,558 INFO L226 Difference]: Without dead ends: 11122 [2021-06-12 21:47:52,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3756.9ms TimeCoverageRelationStatistics Valid=478, Invalid=2492, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:47:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-12 21:47:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 7564. [2021-06-12 21:47:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 7563 states have (on average 3.4084358058971307) internal successors, (25778), 7563 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 25778 transitions. [2021-06-12 21:47:52,676 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 25778 transitions. Word has length 30 [2021-06-12 21:47:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:52,676 INFO L482 AbstractCegarLoop]: Abstraction has 7564 states and 25778 transitions. [2021-06-12 21:47:52,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 25778 transitions. [2021-06-12 21:47:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:52,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:52,685 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:52,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:52,885 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -66350155, now seen corresponding path program 36 times [2021-06-12 21:47:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160724902] [2021-06-12 21:47:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:53,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160724902] [2021-06-12 21:47:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160724902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352358833] [2021-06-12 21:47:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:53,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:47:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:47:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:53,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:53,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:53,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:53,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:47:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352358833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:53,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:53,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 21:47:53,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897315812] [2021-06-12 21:47:53,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:47:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:47:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:47:53,505 INFO L87 Difference]: Start difference. First operand 7564 states and 25778 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:54,161 INFO L93 Difference]: Finished difference Result 7890 states and 26740 transitions. [2021-06-12 21:47:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:47:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:54,174 INFO L225 Difference]: With dead ends: 7890 [2021-06-12 21:47:54,174 INFO L226 Difference]: Without dead ends: 7861 [2021-06-12 21:47:54,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:47:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-06-12 21:47:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7612. [2021-06-12 21:47:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7612 states, 7611 states have (on average 3.408487715149126) internal successors, (25942), 7611 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 25942 transitions. [2021-06-12 21:47:54,270 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 25942 transitions. Word has length 30 [2021-06-12 21:47:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:54,270 INFO L482 AbstractCegarLoop]: Abstraction has 7612 states and 25942 transitions. [2021-06-12 21:47:54,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 25942 transitions. [2021-06-12 21:47:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:54,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:54,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:54,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-12 21:47:54,479 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1138574553, now seen corresponding path program 37 times [2021-06-12 21:47:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:54,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202857919] [2021-06-12 21:47:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:54,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:54,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202857919] [2021-06-12 21:47:54,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202857919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:54,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355646566] [2021-06-12 21:47:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:47:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:55,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:55,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:55,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:55,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:47:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:55,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355646566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:55,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:55,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 21:47:55,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925249337] [2021-06-12 21:47:55,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:47:55,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:47:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:47:55,127 INFO L87 Difference]: Start difference. First operand 7612 states and 25942 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:55,856 INFO L93 Difference]: Finished difference Result 7964 states and 26982 transitions. [2021-06-12 21:47:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:47:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:55,867 INFO L225 Difference]: With dead ends: 7964 [2021-06-12 21:47:55,867 INFO L226 Difference]: Without dead ends: 7927 [2021-06-12 21:47:55,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:47:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-12 21:47:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7628. [2021-06-12 21:47:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.4081552379703686) internal successors, (25994), 7627 states have internal predecessors, (25994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 25994 transitions. [2021-06-12 21:47:55,961 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 25994 transitions. Word has length 30 [2021-06-12 21:47:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:55,961 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 25994 transitions. [2021-06-12 21:47:55,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 25994 transitions. [2021-06-12 21:47:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:55,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:55,970 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:56,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-12 21:47:56,170 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash -427658407, now seen corresponding path program 38 times [2021-06-12 21:47:56,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:56,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300084508] [2021-06-12 21:47:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:56,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:56,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300084508] [2021-06-12 21:47:56,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300084508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:56,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364535333] [2021-06-12 21:47:56,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:56,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:47:56,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:47:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:56,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:56,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:56,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:56,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 21:47:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:56,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364535333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:56,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:56,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 21:47:56,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103327327] [2021-06-12 21:47:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:47:56,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:47:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:47:56,775 INFO L87 Difference]: Start difference. First operand 7628 states and 25994 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:47:57,444 INFO L93 Difference]: Finished difference Result 8177 states and 27650 transitions. [2021-06-12 21:47:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:47:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:47:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:47:57,457 INFO L225 Difference]: With dead ends: 8177 [2021-06-12 21:47:57,457 INFO L226 Difference]: Without dead ends: 8140 [2021-06-12 21:47:57,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:47:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-06-12 21:47:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 7656. [2021-06-12 21:47:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 3.4082299150881776) internal successors, (26090), 7655 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 26090 transitions. [2021-06-12 21:47:57,555 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 26090 transitions. Word has length 30 [2021-06-12 21:47:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:47:57,555 INFO L482 AbstractCegarLoop]: Abstraction has 7656 states and 26090 transitions. [2021-06-12 21:47:57,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:47:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 26090 transitions. [2021-06-12 21:47:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:47:57,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:47:57,564 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:47:57,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 21:47:57,765 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:47:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:47:57,765 INFO L82 PathProgramCache]: Analyzing trace with hash 53555180, now seen corresponding path program 128 times [2021-06-12 21:47:57,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:47:57,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889717457] [2021-06-12 21:47:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:47:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:47:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:58,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:47:58,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889717457] [2021-06-12 21:47:58,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889717457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:58,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231821190] [2021-06-12 21:47:58,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:47:58,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:47:58,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:47:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:47:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:47:58,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:47:58,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:47:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:47:58,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:47:58,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:47:58,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:47:58,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:47:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:47:59,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231821190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:47:59,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:47:59,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:47:59,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979239304] [2021-06-12 21:47:59,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:47:59,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:47:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:47:59,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:47:59,011 INFO L87 Difference]: Start difference. First operand 7656 states and 26090 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:02,497 INFO L93 Difference]: Finished difference Result 9529 states and 31968 transitions. [2021-06-12 21:48:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:48:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:02,511 INFO L225 Difference]: With dead ends: 9529 [2021-06-12 21:48:02,511 INFO L226 Difference]: Without dead ends: 9497 [2021-06-12 21:48:02,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2500.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:48:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-12 21:48:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 7679. [2021-06-12 21:48:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.40739775983329) internal successors, (26162), 7678 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 26162 transitions. [2021-06-12 21:48:02,619 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 26162 transitions. Word has length 30 [2021-06-12 21:48:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:02,619 INFO L482 AbstractCegarLoop]: Abstraction has 7679 states and 26162 transitions. [2021-06-12 21:48:02,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 26162 transitions. [2021-06-12 21:48:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:02,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:02,628 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:02,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 21:48:02,828 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -920787924, now seen corresponding path program 129 times [2021-06-12 21:48:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:02,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702693450] [2021-06-12 21:48:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:03,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:03,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702693450] [2021-06-12 21:48:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702693450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:03,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020828406] [2021-06-12 21:48:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:03,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:48:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:48:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:04,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-12 21:48:04,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:48:04,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:04,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:04,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:156 [2021-06-12 21:48:04,530 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-12 21:48:05,201 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 21:48:05,518 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-12 21:48:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:05,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020828406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:05,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:05,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:48:05,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47656193] [2021-06-12 21:48:05,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:48:05,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:48:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:48:05,564 INFO L87 Difference]: Start difference. First operand 7679 states and 26162 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:06,439 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 19 [2021-06-12 21:48:06,608 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 18 [2021-06-12 21:48:06,769 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-06-12 21:48:07,563 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 21:48:07,834 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-06-12 21:48:08,195 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-06-12 21:48:08,564 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-06-12 21:48:09,471 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-06-12 21:48:09,741 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2021-06-12 21:48:10,379 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-12 21:48:10,839 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-06-12 21:48:11,072 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2021-06-12 21:48:11,364 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2021-06-12 21:48:11,934 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2021-06-12 21:48:12,594 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-12 21:48:13,218 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 21:48:13,603 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-12 21:48:14,220 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 21:48:14,792 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-06-12 21:48:15,088 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 22 [2021-06-12 21:48:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:15,270 INFO L93 Difference]: Finished difference Result 10868 states and 36318 transitions. [2021-06-12 21:48:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:48:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:15,287 INFO L225 Difference]: With dead ends: 10868 [2021-06-12 21:48:15,287 INFO L226 Difference]: Without dead ends: 10793 [2021-06-12 21:48:15,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 9436.0ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:48:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-06-12 21:48:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 7682. [2021-06-12 21:48:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 3.406587683895326) internal successors, (26166), 7681 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 26166 transitions. [2021-06-12 21:48:15,419 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 26166 transitions. Word has length 30 [2021-06-12 21:48:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:15,419 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 26166 transitions. [2021-06-12 21:48:15,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 26166 transitions. [2021-06-12 21:48:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:15,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:15,429 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:15,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:15,629 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 306904492, now seen corresponding path program 130 times [2021-06-12 21:48:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:15,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296364790] [2021-06-12 21:48:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:16,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:16,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296364790] [2021-06-12 21:48:16,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296364790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:16,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935338490] [2021-06-12 21:48:16,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:16,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:48:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:48:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:16,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:48:16,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:48:16,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:48:16,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:16,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:16,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:48:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:16,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935338490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:16,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:16,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:48:16,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86466440] [2021-06-12 21:48:16,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:48:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:16,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:48:16,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:48:16,767 INFO L87 Difference]: Start difference. First operand 7682 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:19,546 INFO L93 Difference]: Finished difference Result 10040 states and 33750 transitions. [2021-06-12 21:48:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:48:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:19,562 INFO L225 Difference]: With dead ends: 10040 [2021-06-12 21:48:19,562 INFO L226 Difference]: Without dead ends: 9989 [2021-06-12 21:48:19,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2116.5ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:48:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-06-12 21:48:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7724. [2021-06-12 21:48:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 3.4080020717337822) internal successors, (26320), 7723 states have internal predecessors, (26320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 26320 transitions. [2021-06-12 21:48:19,699 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 26320 transitions. Word has length 30 [2021-06-12 21:48:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:19,699 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 26320 transitions. [2021-06-12 21:48:19,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 26320 transitions. [2021-06-12 21:48:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:19,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:19,708 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:19,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-12 21:48:19,908 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash 861731688, now seen corresponding path program 131 times [2021-06-12 21:48:19,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:19,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13272713] [2021-06-12 21:48:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:20,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13272713] [2021-06-12 21:48:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13272713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051923667] [2021-06-12 21:48:20,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:20,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:48:20,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:48:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:21,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:48:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:48:21,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:48:21,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:21,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:21,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:48:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051923667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:21,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:21,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:48:21,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301923199] [2021-06-12 21:48:21,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:48:21,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:48:21,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:48:21,177 INFO L87 Difference]: Start difference. First operand 7724 states and 26320 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:22,270 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-12 21:48:22,678 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-12 21:48:23,370 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-12 21:48:23,910 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-12 21:48:24,688 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-12 21:48:25,196 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-06-12 21:48:25,825 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-06-12 21:48:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:26,463 INFO L93 Difference]: Finished difference Result 10471 states and 35019 transitions. [2021-06-12 21:48:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:48:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:26,479 INFO L225 Difference]: With dead ends: 10471 [2021-06-12 21:48:26,479 INFO L226 Difference]: Without dead ends: 10435 [2021-06-12 21:48:26,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 3937.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:48:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-12 21:48:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 7741. [2021-06-12 21:48:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.4059431524547805) internal successors, (26362), 7740 states have internal predecessors, (26362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 26362 transitions. [2021-06-12 21:48:26,599 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 26362 transitions. Word has length 30 [2021-06-12 21:48:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:26,599 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 26362 transitions. [2021-06-12 21:48:26,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 26362 transitions. [2021-06-12 21:48:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:26,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:26,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:26,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:26,808 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -806581072, now seen corresponding path program 132 times [2021-06-12 21:48:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:26,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506976928] [2021-06-12 21:48:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:27,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:27,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506976928] [2021-06-12 21:48:27,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506976928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:27,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186103653] [2021-06-12 21:48:27,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:27,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:48:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:48:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:27,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:48:27,940 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:27,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:27,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:27,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:48:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:28,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186103653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:28,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:28,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:48:28,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416352076] [2021-06-12 21:48:28,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:48:28,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:48:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:48:28,065 INFO L87 Difference]: Start difference. First operand 7741 states and 26362 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:28,853 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-12 21:48:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:31,394 INFO L93 Difference]: Finished difference Result 10347 states and 34526 transitions. [2021-06-12 21:48:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:48:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:31,410 INFO L225 Difference]: With dead ends: 10347 [2021-06-12 21:48:31,410 INFO L226 Difference]: Without dead ends: 10275 [2021-06-12 21:48:31,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2375.9ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:48:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2021-06-12 21:48:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 7692. [2021-06-12 21:48:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4054089195163177) internal successors, (26191), 7691 states have internal predecessors, (26191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26191 transitions. [2021-06-12 21:48:31,531 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26191 transitions. Word has length 30 [2021-06-12 21:48:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:31,531 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26191 transitions. [2021-06-12 21:48:31,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26191 transitions. [2021-06-12 21:48:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:31,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:31,540 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:31,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 21:48:31,740 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -697524088, now seen corresponding path program 133 times [2021-06-12 21:48:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:31,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656987767] [2021-06-12 21:48:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656987767] [2021-06-12 21:48:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656987767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54030706] [2021-06-12 21:48:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:48:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:48:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:48:32,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:48:32,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:32,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:32,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:48:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:32,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54030706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:32,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:32,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:48:32,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286303346] [2021-06-12 21:48:32,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:48:32,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:32,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:48:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:48:32,982 INFO L87 Difference]: Start difference. First operand 7692 states and 26191 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:33,191 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-12 21:48:33,343 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:48:33,687 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 21:48:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:35,312 INFO L93 Difference]: Finished difference Result 9596 states and 32348 transitions. [2021-06-12 21:48:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:48:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:35,326 INFO L225 Difference]: With dead ends: 9596 [2021-06-12 21:48:35,326 INFO L226 Difference]: Without dead ends: 9581 [2021-06-12 21:48:35,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1925.1ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:48:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-06-12 21:48:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 7697. [2021-06-12 21:48:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.4056652806652807) internal successors, (26210), 7696 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26210 transitions. [2021-06-12 21:48:35,435 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26210 transitions. Word has length 30 [2021-06-12 21:48:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:35,435 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26210 transitions. [2021-06-12 21:48:35,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26210 transitions. [2021-06-12 21:48:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:35,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:35,446 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:35,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:35,646 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:35,646 INFO L82 PathProgramCache]: Analyzing trace with hash -951187922, now seen corresponding path program 134 times [2021-06-12 21:48:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:35,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521076098] [2021-06-12 21:48:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:36,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521076098] [2021-06-12 21:48:36,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521076098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203867395] [2021-06-12 21:48:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:48:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:48:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:36,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:36,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:48:36,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:36,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:36,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:36,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:48:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:36,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203867395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:36,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:36,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:48:36,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359453278] [2021-06-12 21:48:36,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:48:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:36,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:48:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:48:36,886 INFO L87 Difference]: Start difference. First operand 7697 states and 26210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:37,079 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-12 21:48:37,228 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 21:48:37,541 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-12 21:48:38,694 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-12 21:48:38,928 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-12 21:48:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:39,904 INFO L93 Difference]: Finished difference Result 9964 states and 33540 transitions. [2021-06-12 21:48:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:48:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:39,919 INFO L225 Difference]: With dead ends: 9964 [2021-06-12 21:48:39,919 INFO L226 Difference]: Without dead ends: 9949 [2021-06-12 21:48:39,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2359.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:48:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-06-12 21:48:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 7694. [2021-06-12 21:48:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 3.4053035226829587) internal successors, (26197), 7693 states have internal predecessors, (26197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 26197 transitions. [2021-06-12 21:48:40,035 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 26197 transitions. Word has length 30 [2021-06-12 21:48:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:40,035 INFO L482 AbstractCegarLoop]: Abstraction has 7694 states and 26197 transitions. [2021-06-12 21:48:40,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 26197 transitions. [2021-06-12 21:48:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:40,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:40,045 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:40,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 21:48:40,245 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1739005664, now seen corresponding path program 135 times [2021-06-12 21:48:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:40,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083078065] [2021-06-12 21:48:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:40,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:40,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083078065] [2021-06-12 21:48:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083078065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:40,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612108630] [2021-06-12 21:48:40,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:40,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:48:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:48:40,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:41,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:41,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:48:41,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:48:41,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:48:41,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:41,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:41,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:48:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:41,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612108630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:41,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:41,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:48:41,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106960456] [2021-06-12 21:48:41,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:48:41,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:48:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:48:41,586 INFO L87 Difference]: Start difference. First operand 7694 states and 26197 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:43,161 INFO L93 Difference]: Finished difference Result 9270 states and 31237 transitions. [2021-06-12 21:48:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:48:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:43,175 INFO L225 Difference]: With dead ends: 9270 [2021-06-12 21:48:43,175 INFO L226 Difference]: Without dead ends: 9255 [2021-06-12 21:48:43,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1423.3ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:48:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-06-12 21:48:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7697. [2021-06-12 21:48:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.405535343035343) internal successors, (26209), 7696 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26209 transitions. [2021-06-12 21:48:43,298 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26209 transitions. Word has length 30 [2021-06-12 21:48:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:43,298 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26209 transitions. [2021-06-12 21:48:43,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26209 transitions. [2021-06-12 21:48:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:43,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:43,307 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:43,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:43,507 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1234861006, now seen corresponding path program 136 times [2021-06-12 21:48:43,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:43,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984875707] [2021-06-12 21:48:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:44,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:44,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984875707] [2021-06-12 21:48:44,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984875707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:44,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692084431] [2021-06-12 21:48:44,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:44,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:48:44,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:48:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:44,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:44,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:48:44,700 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:44,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:44,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:44,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:48:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:44,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692084431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:44,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:44,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:48:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768664905] [2021-06-12 21:48:44,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:48:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:48:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:48:44,821 INFO L87 Difference]: Start difference. First operand 7697 states and 26209 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:46,592 INFO L93 Difference]: Finished difference Result 9829 states and 33022 transitions. [2021-06-12 21:48:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:48:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:46,607 INFO L225 Difference]: With dead ends: 9829 [2021-06-12 21:48:46,607 INFO L226 Difference]: Without dead ends: 9810 [2021-06-12 21:48:46,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1686.5ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:48:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-06-12 21:48:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7693. [2021-06-12 21:48:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 7692 states have (on average 3.40535621424857) internal successors, (26194), 7692 states have internal predecessors, (26194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 26194 transitions. [2021-06-12 21:48:46,767 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 26194 transitions. Word has length 30 [2021-06-12 21:48:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:46,767 INFO L482 AbstractCegarLoop]: Abstraction has 7693 states and 26194 transitions. [2021-06-12 21:48:46,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 26194 transitions. [2021-06-12 21:48:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:46,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:46,776 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:46,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:46,976 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1901077732, now seen corresponding path program 137 times [2021-06-12 21:48:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:46,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101826548] [2021-06-12 21:48:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101826548] [2021-06-12 21:48:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101826548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108255055] [2021-06-12 21:48:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:47,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:48:47,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:48:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:48,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:48,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:48:48,076 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:48,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:48,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:48,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:48:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:48,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108255055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:48,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:48,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:48:48,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473426587] [2021-06-12 21:48:48,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:48:48,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:48:48,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:48:48,286 INFO L87 Difference]: Start difference. First operand 7693 states and 26194 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:49,356 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 21:48:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:50,928 INFO L93 Difference]: Finished difference Result 9812 states and 32964 transitions. [2021-06-12 21:48:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:48:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:50,943 INFO L225 Difference]: With dead ends: 9812 [2021-06-12 21:48:50,943 INFO L226 Difference]: Without dead ends: 9774 [2021-06-12 21:48:50,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2036.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:48:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-06-12 21:48:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7691. [2021-06-12 21:48:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.4054616384915475) internal successors, (26188), 7690 states have internal predecessors, (26188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 26188 transitions. [2021-06-12 21:48:51,080 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 26188 transitions. Word has length 30 [2021-06-12 21:48:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:51,080 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 26188 transitions. [2021-06-12 21:48:51,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 26188 transitions. [2021-06-12 21:48:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:51,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:51,089 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:51,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-12 21:48:51,290 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 78542928, now seen corresponding path program 138 times [2021-06-12 21:48:51,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:51,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222997874] [2021-06-12 21:48:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:51,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222997874] [2021-06-12 21:48:51,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222997874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408697828] [2021-06-12 21:48:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:51,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:48:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:48:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:48:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:52,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:48:52,325 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:52,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:52,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:52,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:48:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:52,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408697828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:52,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:52,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 21:48:52,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263608231] [2021-06-12 21:48:52,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:48:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:52,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:48:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:48:52,510 INFO L87 Difference]: Start difference. First operand 7691 states and 26188 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:54,245 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-12 21:48:54,457 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-12 21:48:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:56,330 INFO L93 Difference]: Finished difference Result 9869 states and 33063 transitions. [2021-06-12 21:48:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:48:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:56,344 INFO L225 Difference]: With dead ends: 9869 [2021-06-12 21:48:56,345 INFO L226 Difference]: Without dead ends: 9833 [2021-06-12 21:48:56,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2721.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:48:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-06-12 21:48:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 7688. [2021-06-12 21:48:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 3.4041888903343307) internal successors, (26168), 7687 states have internal predecessors, (26168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 26168 transitions. [2021-06-12 21:48:56,451 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 26168 transitions. Word has length 30 [2021-06-12 21:48:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:48:56,451 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 26168 transitions. [2021-06-12 21:48:56,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 26168 transitions. [2021-06-12 21:48:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:48:56,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:48:56,460 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:48:56,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 21:48:56,662 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:48:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:48:56,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1358479268, now seen corresponding path program 139 times [2021-06-12 21:48:56,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:48:56,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118076883] [2021-06-12 21:48:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:48:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:57,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:48:57,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118076883] [2021-06-12 21:48:57,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118076883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:57,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148821876] [2021-06-12 21:48:57,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:48:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:48:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:48:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:48:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:48:57,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:57,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:48:57,772 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:48:57,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:48:57,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:48:57,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:48:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:48:57,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148821876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:48:57,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:48:57,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:48:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626460228] [2021-06-12 21:48:57,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:48:57,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:48:57,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:48:57,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:48:57,893 INFO L87 Difference]: Start difference. First operand 7688 states and 26168 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:48:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:48:59,853 INFO L93 Difference]: Finished difference Result 10287 states and 34404 transitions. [2021-06-12 21:48:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:48:59,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:48:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:48:59,869 INFO L225 Difference]: With dead ends: 10287 [2021-06-12 21:48:59,869 INFO L226 Difference]: Without dead ends: 10237 [2021-06-12 21:48:59,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1734.4ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:48:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-06-12 21:49:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 7690. [2021-06-12 21:49:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.404343867863181) internal successors, (26176), 7689 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26176 transitions. [2021-06-12 21:49:00,022 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26176 transitions. Word has length 30 [2021-06-12 21:49:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:00,022 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26176 transitions. [2021-06-12 21:49:00,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26176 transitions. [2021-06-12 21:49:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:00,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:00,030 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:00,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-12 21:49:00,231 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash -268655640, now seen corresponding path program 140 times [2021-06-12 21:49:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:00,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641035521] [2021-06-12 21:49:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:00,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641035521] [2021-06-12 21:49:00,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641035521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2222706] [2021-06-12 21:49:00,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:00,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:49:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:49:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:01,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:49:01,390 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:49:01,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:01,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:01,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:49:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:01,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2222706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:01,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:01,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:49:01,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896148937] [2021-06-12 21:49:01,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:49:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:49:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:49:01,564 INFO L87 Difference]: Start difference. First operand 7690 states and 26176 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:02,960 INFO L93 Difference]: Finished difference Result 9773 states and 32852 transitions. [2021-06-12 21:49:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:49:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:02,976 INFO L225 Difference]: With dead ends: 9773 [2021-06-12 21:49:02,976 INFO L226 Difference]: Without dead ends: 9749 [2021-06-12 21:49:02,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1508.8ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:49:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2021-06-12 21:49:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 7684. [2021-06-12 21:49:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 7683 states have (on average 3.404139008199922) internal successors, (26154), 7683 states have internal predecessors, (26154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 26154 transitions. [2021-06-12 21:49:03,115 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 26154 transitions. Word has length 30 [2021-06-12 21:49:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:03,116 INFO L482 AbstractCegarLoop]: Abstraction has 7684 states and 26154 transitions. [2021-06-12 21:49:03,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 26154 transitions. [2021-06-12 21:49:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:03,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:03,125 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:03,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:03,325 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1727704690, now seen corresponding path program 141 times [2021-06-12 21:49:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:03,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270549432] [2021-06-12 21:49:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:03,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:03,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270549432] [2021-06-12 21:49:03,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270549432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:03,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201741943] [2021-06-12 21:49:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:03,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:49:03,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:03,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:49:03,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:04,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:04,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:49:04,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:04,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:04,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:04,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:49:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:04,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201741943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:49:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692900717] [2021-06-12 21:49:04,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:49:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:49:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:49:04,657 INFO L87 Difference]: Start difference. First operand 7684 states and 26154 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:06,718 INFO L93 Difference]: Finished difference Result 9322 states and 31376 transitions. [2021-06-12 21:49:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:49:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:06,733 INFO L225 Difference]: With dead ends: 9322 [2021-06-12 21:49:06,733 INFO L226 Difference]: Without dead ends: 9307 [2021-06-12 21:49:06,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1587.1ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:49:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-12 21:49:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7687. [2021-06-12 21:49:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.4043715846994536) internal successors, (26166), 7686 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 26166 transitions. [2021-06-12 21:49:06,877 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 26166 transitions. Word has length 30 [2021-06-12 21:49:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:06,877 INFO L482 AbstractCegarLoop]: Abstraction has 7687 states and 26166 transitions. [2021-06-12 21:49:06,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 26166 transitions. [2021-06-12 21:49:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:06,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:06,886 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:07,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:07,087 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash -491829020, now seen corresponding path program 142 times [2021-06-12 21:49:07,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:07,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534230987] [2021-06-12 21:49:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:07,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534230987] [2021-06-12 21:49:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534230987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731032786] [2021-06-12 21:49:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:07,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:49:07,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:49:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:49:08,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:08,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:08,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:08,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:49:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:08,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731032786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:08,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:08,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:49:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80147157] [2021-06-12 21:49:08,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:49:08,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:49:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:49:08,374 INFO L87 Difference]: Start difference. First operand 7687 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:11,274 INFO L93 Difference]: Finished difference Result 10068 states and 33705 transitions. [2021-06-12 21:49:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:49:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:11,291 INFO L225 Difference]: With dead ends: 10068 [2021-06-12 21:49:11,291 INFO L226 Difference]: Without dead ends: 10022 [2021-06-12 21:49:11,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2227.6ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:49:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-06-12 21:49:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 7692. [2021-06-12 21:49:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4039786763749835) internal successors, (26180), 7691 states have internal predecessors, (26180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26180 transitions. [2021-06-12 21:49:11,420 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26180 transitions. Word has length 30 [2021-06-12 21:49:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:11,420 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26180 transitions. [2021-06-12 21:49:11,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26180 transitions. [2021-06-12 21:49:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:11,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:11,429 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:11,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-12 21:49:11,630 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash -245264536, now seen corresponding path program 143 times [2021-06-12 21:49:11,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:11,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299871165] [2021-06-12 21:49:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:12,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:12,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299871165] [2021-06-12 21:49:12,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299871165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:12,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449329949] [2021-06-12 21:49:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:12,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:49:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:49:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:12,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:12,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:49:12,763 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:49:12,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:12,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:12,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:49:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:12,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449329949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:12,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:12,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 21:49:12,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706717281] [2021-06-12 21:49:12,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:49:12,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:49:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:49:12,948 INFO L87 Difference]: Start difference. First operand 7692 states and 26180 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:14,620 INFO L93 Difference]: Finished difference Result 10182 states and 34192 transitions. [2021-06-12 21:49:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:49:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:14,635 INFO L225 Difference]: With dead ends: 10182 [2021-06-12 21:49:14,635 INFO L226 Difference]: Without dead ends: 10135 [2021-06-12 21:49:14,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1567.9ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:49:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-06-12 21:49:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 7690. [2021-06-12 21:49:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.403953700091039) internal successors, (26173), 7689 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26173 transitions. [2021-06-12 21:49:14,777 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26173 transitions. Word has length 30 [2021-06-12 21:49:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:14,777 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26173 transitions. [2021-06-12 21:49:14,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26173 transitions. [2021-06-12 21:49:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:14,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:14,786 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:14,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-12 21:49:14,986 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1319108140, now seen corresponding path program 144 times [2021-06-12 21:49:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:14,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326578797] [2021-06-12 21:49:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:15,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326578797] [2021-06-12 21:49:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326578797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161500137] [2021-06-12 21:49:15,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:15,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:49:15,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:49:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:16,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:49:16,010 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:49:16,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:16,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:16,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:49:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161500137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:16,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:16,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:49:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749039819] [2021-06-12 21:49:16,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:49:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:49:16,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:49:16,189 INFO L87 Difference]: Start difference. First operand 7690 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:17,689 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-12 21:49:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:19,267 INFO L93 Difference]: Finished difference Result 9796 states and 32963 transitions. [2021-06-12 21:49:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:49:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:19,282 INFO L225 Difference]: With dead ends: 9796 [2021-06-12 21:49:19,282 INFO L226 Difference]: Without dead ends: 9761 [2021-06-12 21:49:19,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2722.9ms TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:49:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-06-12 21:49:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 7708. [2021-06-12 21:49:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.40352925911509) internal successors, (26231), 7707 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 26231 transitions. [2021-06-12 21:49:19,394 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 26231 transitions. Word has length 30 [2021-06-12 21:49:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:19,394 INFO L482 AbstractCegarLoop]: Abstraction has 7708 states and 26231 transitions. [2021-06-12 21:49:19,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 26231 transitions. [2021-06-12 21:49:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:19,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:19,403 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:19,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:19,604 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash -331160296, now seen corresponding path program 145 times [2021-06-12 21:49:19,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:19,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007870664] [2021-06-12 21:49:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:20,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:20,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007870664] [2021-06-12 21:49:20,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007870664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:20,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459027329] [2021-06-12 21:49:20,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:49:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:20,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:49:20,607 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:49:20,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:20,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:20,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 21:49:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:20,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459027329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:20,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:20,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:49:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302072546] [2021-06-12 21:49:20,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:49:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:49:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:49:20,821 INFO L87 Difference]: Start difference. First operand 7708 states and 26231 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:22,057 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-12 21:49:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:23,571 INFO L93 Difference]: Finished difference Result 9863 states and 33168 transitions. [2021-06-12 21:49:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:49:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:23,586 INFO L225 Difference]: With dead ends: 9863 [2021-06-12 21:49:23,586 INFO L226 Difference]: Without dead ends: 9828 [2021-06-12 21:49:23,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1761.4ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:49:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2021-06-12 21:49:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 7722. [2021-06-12 21:49:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 3.4030565988861547) internal successors, (26275), 7721 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 26275 transitions. [2021-06-12 21:49:23,694 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 26275 transitions. Word has length 30 [2021-06-12 21:49:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:23,695 INFO L482 AbstractCegarLoop]: Abstraction has 7722 states and 26275 transitions. [2021-06-12 21:49:23,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 26275 transitions. [2021-06-12 21:49:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:23,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:23,703 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:23,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 21:49:23,904 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash -276295984, now seen corresponding path program 146 times [2021-06-12 21:49:23,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:23,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250063009] [2021-06-12 21:49:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:24,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:24,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250063009] [2021-06-12 21:49:24,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250063009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963988868] [2021-06-12 21:49:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:24,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:49:24,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:24,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:49:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:24,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:49:24,942 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:49:24,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:24,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:24,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:49:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963988868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:25,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:25,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:49:25,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620569228] [2021-06-12 21:49:25,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:49:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:49:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:49:25,134 INFO L87 Difference]: Start difference. First operand 7722 states and 26275 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:28,095 INFO L93 Difference]: Finished difference Result 10221 states and 34332 transitions. [2021-06-12 21:49:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:49:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:28,112 INFO L225 Difference]: With dead ends: 10221 [2021-06-12 21:49:28,113 INFO L226 Difference]: Without dead ends: 10142 [2021-06-12 21:49:28,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2417.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:49:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-06-12 21:49:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7745. [2021-06-12 21:49:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 7744 states have (on average 3.4021177685950414) internal successors, (26346), 7744 states have internal predecessors, (26346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 26346 transitions. [2021-06-12 21:49:28,235 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 26346 transitions. Word has length 30 [2021-06-12 21:49:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:28,235 INFO L482 AbstractCegarLoop]: Abstraction has 7745 states and 26346 transitions. [2021-06-12 21:49:28,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 26346 transitions. [2021-06-12 21:49:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:28,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:28,244 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:28,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:28,444 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -781961368, now seen corresponding path program 147 times [2021-06-12 21:49:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:28,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832062324] [2021-06-12 21:49:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:29,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:29,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832062324] [2021-06-12 21:49:29,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832062324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:29,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172880477] [2021-06-12 21:49:29,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:29,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:49:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:49:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:29,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:29,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-12 21:49:29,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:49:29,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:29,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:29,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:282 [2021-06-12 21:49:30,104 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-12 21:49:30,755 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 21:49:31,067 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-12 21:49:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:31,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172880477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:31,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:31,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:49:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382762596] [2021-06-12 21:49:31,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:49:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:49:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:49:31,116 INFO L87 Difference]: Start difference. First operand 7745 states and 26346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:32,023 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-06-12 21:49:32,946 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-06-12 21:49:33,858 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 22 [2021-06-12 21:49:34,409 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2021-06-12 21:49:34,679 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2021-06-12 21:49:34,994 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-06-12 21:49:35,967 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-06-12 21:49:36,177 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-06-12 21:49:36,439 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2021-06-12 21:49:36,659 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2021-06-12 21:49:37,056 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-06-12 21:49:37,571 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 23 [2021-06-12 21:49:37,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2021-06-12 21:49:39,018 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-12 21:49:39,281 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-06-12 21:49:40,022 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-12 21:49:40,419 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-06-12 21:49:40,784 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-06-12 21:49:41,327 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-12 21:49:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:41,900 INFO L93 Difference]: Finished difference Result 11812 states and 39325 transitions. [2021-06-12 21:49:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:49:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:41,918 INFO L225 Difference]: With dead ends: 11812 [2021-06-12 21:49:41,918 INFO L226 Difference]: Without dead ends: 11727 [2021-06-12 21:49:41,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 9082.8ms TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:49:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11727 states. [2021-06-12 21:49:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11727 to 7810. [2021-06-12 21:49:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 3.4061979766935586) internal successors, (26599), 7809 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 26599 transitions. [2021-06-12 21:49:42,039 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 26599 transitions. Word has length 30 [2021-06-12 21:49:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 7810 states and 26599 transitions. [2021-06-12 21:49:42,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 26599 transitions. [2021-06-12 21:49:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:42,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:42,048 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:42,249 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 788028937, now seen corresponding path program 50 times [2021-06-12 21:49:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171383101] [2021-06-12 21:49:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:42,466 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-12 21:49:42,968 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-06-12 21:49:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:43,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:43,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171383101] [2021-06-12 21:49:43,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171383101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:43,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100024143] [2021-06-12 21:49:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:43,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:49:43,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:49:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:43,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:49:43,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:43,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:43,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:43,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-12 21:49:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:43,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100024143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:43,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:43,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-12 21:49:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580990144] [2021-06-12 21:49:43,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:49:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:49:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:49:43,810 INFO L87 Difference]: Start difference. First operand 7810 states and 26599 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:45,960 INFO L93 Difference]: Finished difference Result 9430 states and 31554 transitions. [2021-06-12 21:49:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:49:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:45,974 INFO L225 Difference]: With dead ends: 9430 [2021-06-12 21:49:45,974 INFO L226 Difference]: Without dead ends: 9404 [2021-06-12 21:49:45,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2396.1ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:49:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-12 21:49:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7836. [2021-06-12 21:49:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-12 21:49:46,079 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-12 21:49:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:46,079 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-12 21:49:46,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-12 21:49:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:46,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:46,088 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:46,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-12 21:49:46,289 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash 50056363, now seen corresponding path program 51 times [2021-06-12 21:49:46,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:46,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255602103] [2021-06-12 21:49:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:46,500 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-12 21:49:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:47,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255602103] [2021-06-12 21:49:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255602103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780189673] [2021-06-12 21:49:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:47,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:49:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:47,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:49:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:47,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:47,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:47,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:49:47,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:47,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:47,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:47,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:49:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:47,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780189673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:47,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:47,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:49:47,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337401826] [2021-06-12 21:49:47,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:49:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:49:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:49:47,940 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:49,374 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-06-12 21:49:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:53,196 INFO L93 Difference]: Finished difference Result 9653 states and 32165 transitions. [2021-06-12 21:49:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:49:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:53,211 INFO L225 Difference]: With dead ends: 9653 [2021-06-12 21:49:53,211 INFO L226 Difference]: Without dead ends: 9638 [2021-06-12 21:49:53,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3625.5ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:49:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2021-06-12 21:49:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 7836. [2021-06-12 21:49:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-12 21:49:53,323 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-12 21:49:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:53,323 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-12 21:49:53,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-12 21:49:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:53,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:53,332 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:53,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:53,537 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1431852029, now seen corresponding path program 52 times [2021-06-12 21:49:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487343141] [2021-06-12 21:49:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:53,757 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-12 21:49:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:54,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:54,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487343141] [2021-06-12 21:49:54,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487343141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:54,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115338214] [2021-06-12 21:49:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:54,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:49:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:49:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:54,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:54,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:49:54,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:54,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:54,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:54,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-12 21:49:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:54,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115338214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:54,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:54,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-12 21:49:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314685360] [2021-06-12 21:49:54,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:49:54,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:49:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:49:54,942 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:56,688 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-12 21:49:57,794 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 21:49:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:49:58,107 INFO L93 Difference]: Finished difference Result 9381 states and 31423 transitions. [2021-06-12 21:49:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:49:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:49:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:49:58,121 INFO L225 Difference]: With dead ends: 9381 [2021-06-12 21:49:58,121 INFO L226 Difference]: Without dead ends: 9355 [2021-06-12 21:49:58,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3002.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:49:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9355 states. [2021-06-12 21:49:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9355 to 7848. [2021-06-12 21:49:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-12 21:49:58,265 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-12 21:49:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:49:58,265 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-12 21:49:58,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:49:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-12 21:49:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:49:58,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:49:58,274 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:49:58,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:58,489 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:49:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:49:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1082463897, now seen corresponding path program 53 times [2021-06-12 21:49:58,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:49:58,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175439138] [2021-06-12 21:49:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:49:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:49:58,693 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-12 21:49:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:59,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:49:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175439138] [2021-06-12 21:49:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175439138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955424083] [2021-06-12 21:49:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:49:59,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:49:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:49:59,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:49:59,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:49:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:49:59,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:59,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:49:59,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:49:59,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:49:59,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:49:59,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:49:59,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-12 21:49:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:49:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955424083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:49:59,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:49:59,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-12 21:49:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805083008] [2021-06-12 21:49:59,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:49:59,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:49:59,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:49:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:49:59,820 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:01,745 INFO L93 Difference]: Finished difference Result 9369 states and 31402 transitions. [2021-06-12 21:50:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:50:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:01,760 INFO L225 Difference]: With dead ends: 9369 [2021-06-12 21:50:01,760 INFO L226 Difference]: Without dead ends: 9354 [2021-06-12 21:50:01,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2225.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:50:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9354 states. [2021-06-12 21:50:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9354 to 7848. [2021-06-12 21:50:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-12 21:50:01,899 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-12 21:50:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:01,899 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-12 21:50:01,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-12 21:50:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:01,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:01,908 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:02,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-12 21:50:02,113 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash 704274543, now seen corresponding path program 54 times [2021-06-12 21:50:02,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:02,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685584219] [2021-06-12 21:50:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:02,394 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-12 21:50:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:02,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:02,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685584219] [2021-06-12 21:50:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685584219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:02,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977844726] [2021-06-12 21:50:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:02,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:50:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:03,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:03,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:03,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:50:03,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:03,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:03,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:03,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:50:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:03,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977844726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:03,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:03,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-12 21:50:03,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903236512] [2021-06-12 21:50:03,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:03,392 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:04,627 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-06-12 21:50:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:06,461 INFO L93 Difference]: Finished difference Result 9087 states and 30043 transitions. [2021-06-12 21:50:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:50:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:06,473 INFO L225 Difference]: With dead ends: 9087 [2021-06-12 21:50:06,473 INFO L226 Difference]: Without dead ends: 9057 [2021-06-12 21:50:06,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2948.0ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:50:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-12 21:50:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7888. [2021-06-12 21:50:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 3.398250285279574) internal successors, (26802), 7887 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 26802 transitions. [2021-06-12 21:50:06,580 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 26802 transitions. Word has length 30 [2021-06-12 21:50:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:06,580 INFO L482 AbstractCegarLoop]: Abstraction has 7888 states and 26802 transitions. [2021-06-12 21:50:06,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 26802 transitions. [2021-06-12 21:50:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:06,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:06,589 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:06,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:06,790 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 742037125, now seen corresponding path program 55 times [2021-06-12 21:50:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:06,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010716642] [2021-06-12 21:50:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:07,035 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-12 21:50:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:07,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010716642] [2021-06-12 21:50:07,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010716642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642692234] [2021-06-12 21:50:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:50:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:08,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:08,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:50:08,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:08,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:08,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:08,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:50:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:08,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642692234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:08,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:08,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:50:08,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854457264] [2021-06-12 21:50:08,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:08,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:08,156 INFO L87 Difference]: Start difference. First operand 7888 states and 26802 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:08,967 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-12 21:50:10,285 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-06-12 21:50:12,326 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-12 21:50:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:12,562 INFO L93 Difference]: Finished difference Result 9802 states and 32822 transitions. [2021-06-12 21:50:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:50:12,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:12,578 INFO L225 Difference]: With dead ends: 9802 [2021-06-12 21:50:12,578 INFO L226 Difference]: Without dead ends: 9740 [2021-06-12 21:50:12,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 3916.8ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:50:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2021-06-12 21:50:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 7900. [2021-06-12 21:50:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 3.396885681731865) internal successors, (26832), 7899 states have internal predecessors, (26832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 26832 transitions. [2021-06-12 21:50:12,691 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 26832 transitions. Word has length 30 [2021-06-12 21:50:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:12,691 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 26832 transitions. [2021-06-12 21:50:12,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 26832 transitions. [2021-06-12 21:50:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:12,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:12,700 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:12,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:12,901 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1402383373, now seen corresponding path program 56 times [2021-06-12 21:50:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:12,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978076785] [2021-06-12 21:50:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:13,151 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-12 21:50:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:13,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978076785] [2021-06-12 21:50:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978076785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546102119] [2021-06-12 21:50:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:13,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:50:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:50:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:14,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:14,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:50:14,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:14,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:14,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:14,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:50:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:14,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546102119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:14,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:14,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:50:14,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058266578] [2021-06-12 21:50:14,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:14,193 INFO L87 Difference]: Start difference. First operand 7900 states and 26832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:17,450 INFO L93 Difference]: Finished difference Result 9832 states and 32876 transitions. [2021-06-12 21:50:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:50:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:17,465 INFO L225 Difference]: With dead ends: 9832 [2021-06-12 21:50:17,465 INFO L226 Difference]: Without dead ends: 9778 [2021-06-12 21:50:17,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2810.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:50:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-12 21:50:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7906. [2021-06-12 21:50:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7905 states have (on average 3.3964579380139153) internal successors, (26849), 7905 states have internal predecessors, (26849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 26849 transitions. [2021-06-12 21:50:17,576 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 26849 transitions. Word has length 30 [2021-06-12 21:50:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:17,576 INFO L482 AbstractCegarLoop]: Abstraction has 7906 states and 26849 transitions. [2021-06-12 21:50:17,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 26849 transitions. [2021-06-12 21:50:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:17,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:17,618 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:17,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:17,819 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash -754295013, now seen corresponding path program 57 times [2021-06-12 21:50:17,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:17,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236305041] [2021-06-12 21:50:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:18,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236305041] [2021-06-12 21:50:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236305041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226111419] [2021-06-12 21:50:18,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:18,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:50:18,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:50:18,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:50:19,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:19,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:19,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:19,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-12 21:50:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:19,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226111419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:19,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:19,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 21:50:19,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477507617] [2021-06-12 21:50:19,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:50:19,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:50:19,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:50:19,492 INFO L87 Difference]: Start difference. First operand 7906 states and 26849 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:20,809 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-06-12 21:50:23,275 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-12 21:50:24,237 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-12 21:50:25,623 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-12 21:50:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:26,274 INFO L93 Difference]: Finished difference Result 9776 states and 32529 transitions. [2021-06-12 21:50:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:50:26,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:26,288 INFO L225 Difference]: With dead ends: 9776 [2021-06-12 21:50:26,289 INFO L226 Difference]: Without dead ends: 9693 [2021-06-12 21:50:26,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 4723.7ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:50:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2021-06-12 21:50:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 7982. [2021-06-12 21:50:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7982 states, 7981 states have (on average 3.3914296454078436) internal successors, (27067), 7981 states have internal predecessors, (27067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7982 states to 7982 states and 27067 transitions. [2021-06-12 21:50:26,402 INFO L78 Accepts]: Start accepts. Automaton has 7982 states and 27067 transitions. Word has length 30 [2021-06-12 21:50:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:26,402 INFO L482 AbstractCegarLoop]: Abstraction has 7982 states and 27067 transitions. [2021-06-12 21:50:26,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7982 states and 27067 transitions. [2021-06-12 21:50:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:26,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:26,412 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:26,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-12 21:50:26,612 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash -716532431, now seen corresponding path program 58 times [2021-06-12 21:50:26,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:26,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568761687] [2021-06-12 21:50:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:26,817 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-12 21:50:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:27,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568761687] [2021-06-12 21:50:27,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568761687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674621748] [2021-06-12 21:50:27,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:27,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:50:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:50:27,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:27,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:27,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:27,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-12 21:50:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:27,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674621748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:27,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:27,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-12 21:50:27,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945798593] [2021-06-12 21:50:27,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:50:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:27,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:50:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:50:27,961 INFO L87 Difference]: Start difference. First operand 7982 states and 27067 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:30,540 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-12 21:50:30,752 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-12 21:50:31,006 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-06-12 21:50:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:31,191 INFO L93 Difference]: Finished difference Result 9883 states and 33050 transitions. [2021-06-12 21:50:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:50:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:31,206 INFO L225 Difference]: With dead ends: 9883 [2021-06-12 21:50:31,206 INFO L226 Difference]: Without dead ends: 9857 [2021-06-12 21:50:31,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3240.9ms TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:50:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2021-06-12 21:50:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 7986. [2021-06-12 21:50:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-12 21:50:31,339 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-12 21:50:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:31,340 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-12 21:50:31,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-12 21:50:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:31,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:31,349 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:31,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:31,551 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:31,551 INFO L82 PathProgramCache]: Analyzing trace with hash -953383713, now seen corresponding path program 59 times [2021-06-12 21:50:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:31,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812401871] [2021-06-12 21:50:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:31,753 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-12 21:50:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:32,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812401871] [2021-06-12 21:50:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812401871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760627344] [2021-06-12 21:50:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:32,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:32,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:32,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:50:32,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:50:32,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:50:32,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:32,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:32,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-12 21:50:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:32,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760627344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:32,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:32,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-12 21:50:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33252570] [2021-06-12 21:50:32,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:32,980 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:34,857 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 21:50:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:35,202 INFO L93 Difference]: Finished difference Result 9410 states and 31546 transitions. [2021-06-12 21:50:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:50:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:35,216 INFO L225 Difference]: With dead ends: 9410 [2021-06-12 21:50:35,216 INFO L226 Difference]: Without dead ends: 9384 [2021-06-12 21:50:35,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2625.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:50:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-06-12 21:50:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 7986. [2021-06-12 21:50:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-12 21:50:35,351 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-12 21:50:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:35,352 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-12 21:50:35,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-12 21:50:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:35,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:35,361 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:35,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-12 21:50:35,562 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -664551470, now seen corresponding path program 148 times [2021-06-12 21:50:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:35,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074706631] [2021-06-12 21:50:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:35,951 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 21:50:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:36,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074706631] [2021-06-12 21:50:36,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074706631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527229750] [2021-06-12 21:50:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:36,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:50:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:50:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:36,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:36,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:50:36,886 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:50:36,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:36,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:36,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:50:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:37,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527229750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:37,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:37,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:50:37,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929406739] [2021-06-12 21:50:37,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:50:37,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:50:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:50:37,008 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:38,033 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-06-12 21:50:38,372 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-12 21:50:38,607 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 21:50:38,916 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 21:50:39,126 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 21:50:40,273 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-12 21:50:40,452 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-06-12 21:50:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:41,163 INFO L93 Difference]: Finished difference Result 10995 states and 36694 transitions. [2021-06-12 21:50:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:50:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:41,180 INFO L225 Difference]: With dead ends: 10995 [2021-06-12 21:50:41,180 INFO L226 Difference]: Without dead ends: 10970 [2021-06-12 21:50:41,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 3229.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:50:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-06-12 21:50:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 8000. [2021-06-12 21:50:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8000 states, 7999 states have (on average 3.3905488186023254) internal successors, (27121), 7999 states have internal predecessors, (27121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8000 states to 8000 states and 27121 transitions. [2021-06-12 21:50:41,309 INFO L78 Accepts]: Start accepts. Automaton has 8000 states and 27121 transitions. Word has length 30 [2021-06-12 21:50:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:41,309 INFO L482 AbstractCegarLoop]: Abstraction has 8000 states and 27121 transitions. [2021-06-12 21:50:41,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8000 states and 27121 transitions. [2021-06-12 21:50:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:41,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:41,318 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:41,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-12 21:50:41,518 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash 853941454, now seen corresponding path program 149 times [2021-06-12 21:50:41,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:41,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157540198] [2021-06-12 21:50:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:41,873 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:50:41,991 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-12 21:50:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157540198] [2021-06-12 21:50:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157540198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716766546] [2021-06-12 21:50:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:42,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:50:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:50:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:42,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:42,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:50:42,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:50:42,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:42,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:42,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-12 21:50:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:43,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716766546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:43,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:43,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-06-12 21:50:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187050661] [2021-06-12 21:50:43,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:50:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:50:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:50:43,067 INFO L87 Difference]: Start difference. First operand 8000 states and 27121 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:43,753 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-12 21:50:45,638 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-06-12 21:50:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:46,092 INFO L93 Difference]: Finished difference Result 10084 states and 33776 transitions. [2021-06-12 21:50:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:50:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:46,107 INFO L225 Difference]: With dead ends: 10084 [2021-06-12 21:50:46,108 INFO L226 Difference]: Without dead ends: 10059 [2021-06-12 21:50:46,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2533.2ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:50:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2021-06-12 21:50:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 7998. [2021-06-12 21:50:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7997 states have (on average 3.3905214455420785) internal successors, (27114), 7997 states have internal predecessors, (27114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 27114 transitions. [2021-06-12 21:50:46,223 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 27114 transitions. Word has length 30 [2021-06-12 21:50:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:46,223 INFO L482 AbstractCegarLoop]: Abstraction has 7998 states and 27114 transitions. [2021-06-12 21:50:46,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 27114 transitions. [2021-06-12 21:50:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:46,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:46,232 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:46,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:46,433 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 251753802, now seen corresponding path program 150 times [2021-06-12 21:50:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:46,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487145274] [2021-06-12 21:50:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:46,779 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:50:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:47,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487145274] [2021-06-12 21:50:47,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487145274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330061724] [2021-06-12 21:50:47,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:47,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:50:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:50:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:50:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:47,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:50:47,738 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:50:47,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:47,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:47,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:50:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:47,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330061724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:47,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:47,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:50:47,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46170580] [2021-06-12 21:50:47,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:47,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:47,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:47,867 INFO L87 Difference]: Start difference. First operand 7998 states and 27114 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:48,575 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-06-12 21:50:49,779 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-06-12 21:50:50,059 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-06-12 21:50:50,375 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-12 21:50:50,770 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-12 21:50:51,981 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 21:50:52,519 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 21:50:52,932 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 21:50:53,197 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 21:50:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:50:54,538 INFO L93 Difference]: Finished difference Result 10494 states and 35074 transitions. [2021-06-12 21:50:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:50:54,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:50:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:50:54,554 INFO L225 Difference]: With dead ends: 10494 [2021-06-12 21:50:54,554 INFO L226 Difference]: Without dead ends: 10459 [2021-06-12 21:50:54,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 4892.6ms TimeCoverageRelationStatistics Valid=388, Invalid=3152, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:50:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-06-12 21:50:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 7994. [2021-06-12 21:50:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 3.390716877267609) internal successors, (27102), 7993 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 27102 transitions. [2021-06-12 21:50:54,676 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 27102 transitions. Word has length 30 [2021-06-12 21:50:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:50:54,676 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 27102 transitions. [2021-06-12 21:50:54,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 27102 transitions. [2021-06-12 21:50:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:50:54,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:50:54,685 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:50:54,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-12 21:50:54,886 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:50:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:50:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 573674318, now seen corresponding path program 151 times [2021-06-12 21:50:54,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:50:54,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777418914] [2021-06-12 21:50:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:50:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:55,271 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 21:50:55,412 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-06-12 21:50:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:55,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:50:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777418914] [2021-06-12 21:50:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777418914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258872357] [2021-06-12 21:50:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:50:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:50:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:50:55,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:50:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:50:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:50:56,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:50:56,116 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:50:56,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:50:56,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:50:56,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:50:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:50:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258872357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:50:56,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:50:56,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:50:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276121735] [2021-06-12 21:50:56,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:50:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:50:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:50:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:50:56,318 INFO L87 Difference]: Start difference. First operand 7994 states and 27102 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:50:56,763 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-12 21:50:58,038 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-12 21:50:58,193 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:50:58,613 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-12 21:50:58,900 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-12 21:50:59,081 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 21:51:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:00,090 INFO L93 Difference]: Finished difference Result 10167 states and 33996 transitions. [2021-06-12 21:51:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:51:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:00,105 INFO L225 Difference]: With dead ends: 10167 [2021-06-12 21:51:00,106 INFO L226 Difference]: Without dead ends: 10142 [2021-06-12 21:51:00,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3221.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:51:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-06-12 21:51:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7984. [2021-06-12 21:51:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.3899536515094577) internal successors, (27062), 7983 states have internal predecessors, (27062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 27062 transitions. [2021-06-12 21:51:00,243 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 27062 transitions. Word has length 30 [2021-06-12 21:51:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:00,243 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 27062 transitions. [2021-06-12 21:51:00,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 27062 transitions. [2021-06-12 21:51:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:00,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:00,252 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:00,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-12 21:51:00,453 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1259503864, now seen corresponding path program 152 times [2021-06-12 21:51:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831640107] [2021-06-12 21:51:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:00,814 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 21:51:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:01,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:01,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831640107] [2021-06-12 21:51:01,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831640107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:01,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144555913] [2021-06-12 21:51:01,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:01,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:51:01,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:51:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:01,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:01,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:51:01,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:01,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:01,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:01,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:51:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144555913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:01,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:01,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:51:01,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758031107] [2021-06-12 21:51:01,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:51:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:51:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:51:01,871 INFO L87 Difference]: Start difference. First operand 7984 states and 27062 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:03,677 INFO L93 Difference]: Finished difference Result 9731 states and 32614 transitions. [2021-06-12 21:51:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:51:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:03,691 INFO L225 Difference]: With dead ends: 9731 [2021-06-12 21:51:03,691 INFO L226 Difference]: Without dead ends: 9710 [2021-06-12 21:51:03,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1773.2ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:51:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-06-12 21:51:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 7980. [2021-06-12 21:51:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 3.3896478255420477) internal successors, (27046), 7979 states have internal predecessors, (27046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 27046 transitions. [2021-06-12 21:51:03,835 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 27046 transitions. Word has length 30 [2021-06-12 21:51:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:03,835 INFO L482 AbstractCegarLoop]: Abstraction has 7980 states and 27046 transitions. [2021-06-12 21:51:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 27046 transitions. [2021-06-12 21:51:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:03,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:03,845 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:04,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:04,045 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1211576124, now seen corresponding path program 153 times [2021-06-12 21:51:04,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:04,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827586234] [2021-06-12 21:51:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:04,408 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 21:51:04,528 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-06-12 21:51:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:04,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827586234] [2021-06-12 21:51:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827586234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068842279] [2021-06-12 21:51:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:04,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:51:04,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:51:04,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:05,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:05,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-12 21:51:05,377 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:05,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:05,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:05,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-12 21:51:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:05,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068842279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:05,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:05,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:51:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079114132] [2021-06-12 21:51:05,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:05,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:05,588 INFO L87 Difference]: Start difference. First operand 7980 states and 27046 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:06,218 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-06-12 21:51:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:07,396 INFO L93 Difference]: Finished difference Result 9872 states and 33137 transitions. [2021-06-12 21:51:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:51:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:07,412 INFO L225 Difference]: With dead ends: 9872 [2021-06-12 21:51:07,412 INFO L226 Difference]: Without dead ends: 9847 [2021-06-12 21:51:07,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1977.3ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:51:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2021-06-12 21:51:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 7958. [2021-06-12 21:51:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 3.390222445645344) internal successors, (26976), 7957 states have internal predecessors, (26976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 26976 transitions. [2021-06-12 21:51:07,556 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 26976 transitions. Word has length 30 [2021-06-12 21:51:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:07,556 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 26976 transitions. [2021-06-12 21:51:07,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 26976 transitions. [2021-06-12 21:51:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:07,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:07,566 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:07,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:07,766 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1891615694, now seen corresponding path program 154 times [2021-06-12 21:51:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:07,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496111748] [2021-06-12 21:51:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:08,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496111748] [2021-06-12 21:51:08,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496111748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529135588] [2021-06-12 21:51:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:08,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:51:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:51:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:09,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:51:09,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:09,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:09,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:09,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:51:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:09,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529135588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:09,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:09,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:09,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925025791] [2021-06-12 21:51:09,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:09,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:09,055 INFO L87 Difference]: Start difference. First operand 7958 states and 26976 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:09,265 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-12 21:51:09,417 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:51:09,883 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 21:51:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:11,137 INFO L93 Difference]: Finished difference Result 9882 states and 33193 transitions. [2021-06-12 21:51:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:51:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:11,152 INFO L225 Difference]: With dead ends: 9882 [2021-06-12 21:51:11,152 INFO L226 Difference]: Without dead ends: 9867 [2021-06-12 21:51:11,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1958.6ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:51:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2021-06-12 21:51:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 7963. [2021-06-12 21:51:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-06-12 21:51:11,301 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-06-12 21:51:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:11,301 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-06-12 21:51:11,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-06-12 21:51:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:11,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:11,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:11,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:11,510 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2145279528, now seen corresponding path program 155 times [2021-06-12 21:51:11,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:11,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319654539] [2021-06-12 21:51:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:12,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:12,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319654539] [2021-06-12 21:51:12,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319654539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:12,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607879723] [2021-06-12 21:51:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:12,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:51:12,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:12,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:51:12,618 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:12,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:12,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:12,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:51:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:12,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607879723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:12,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:12,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:12,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10936748] [2021-06-12 21:51:12,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:12,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:12,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:12,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:12,742 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:12,949 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-12 21:51:13,107 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 21:51:13,655 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-12 21:51:14,388 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-06-12 21:51:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:16,141 INFO L93 Difference]: Finished difference Result 10270 states and 34453 transitions. [2021-06-12 21:51:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:51:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:16,156 INFO L225 Difference]: With dead ends: 10270 [2021-06-12 21:51:16,156 INFO L226 Difference]: Without dead ends: 10255 [2021-06-12 21:51:16,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2457.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:51:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-06-12 21:51:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 7960. [2021-06-12 21:51:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7959 states have (on average 3.390124387485865) internal successors, (26982), 7959 states have internal predecessors, (26982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 26982 transitions. [2021-06-12 21:51:16,276 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 26982 transitions. Word has length 30 [2021-06-12 21:51:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:16,276 INFO L482 AbstractCegarLoop]: Abstraction has 7960 states and 26982 transitions. [2021-06-12 21:51:16,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 26982 transitions. [2021-06-12 21:51:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:16,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:16,286 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:16,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-12 21:51:16,487 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:16,487 INFO L82 PathProgramCache]: Analyzing trace with hash 544914058, now seen corresponding path program 156 times [2021-06-12 21:51:16,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:16,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267339996] [2021-06-12 21:51:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:17,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:17,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267339996] [2021-06-12 21:51:17,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267339996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:17,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7187409] [2021-06-12 21:51:17,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:17,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:51:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:51:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:17,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:17,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:51:17,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:17,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:17,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:17,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:51:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:17,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7187409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:17,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:17,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:17,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257901841] [2021-06-12 21:51:17,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:17,838 INFO L87 Difference]: Start difference. First operand 7960 states and 26982 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:19,688 INFO L93 Difference]: Finished difference Result 9564 states and 32107 transitions. [2021-06-12 21:51:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:51:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:19,703 INFO L225 Difference]: With dead ends: 9564 [2021-06-12 21:51:19,703 INFO L226 Difference]: Without dead ends: 9549 [2021-06-12 21:51:19,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1405.6ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:51:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-06-12 21:51:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7963. [2021-06-12 21:51:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3903541823662398) internal successors, (26994), 7962 states have internal predecessors, (26994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26994 transitions. [2021-06-12 21:51:19,813 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26994 transitions. Word has length 30 [2021-06-12 21:51:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:19,813 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26994 transitions. [2021-06-12 21:51:19,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26994 transitions. [2021-06-12 21:51:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:19,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:19,823 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:20,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:20,023 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1866014684, now seen corresponding path program 157 times [2021-06-12 21:51:20,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:20,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283391822] [2021-06-12 21:51:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:20,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:20,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283391822] [2021-06-12 21:51:20,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283391822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:20,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109419074] [2021-06-12 21:51:20,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:51:20,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:21,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:21,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:51:21,222 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:21,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:21,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:21,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:51:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109419074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:21,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167372703] [2021-06-12 21:51:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:21,341 INFO L87 Difference]: Start difference. First operand 7963 states and 26994 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:23,387 INFO L93 Difference]: Finished difference Result 10118 states and 33877 transitions. [2021-06-12 21:51:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:51:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:23,402 INFO L225 Difference]: With dead ends: 10118 [2021-06-12 21:51:23,402 INFO L226 Difference]: Without dead ends: 10099 [2021-06-12 21:51:23,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1651.3ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:51:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-06-12 21:51:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 7959. [2021-06-12 21:51:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.3901734104046244) internal successors, (26979), 7958 states have internal predecessors, (26979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26979 transitions. [2021-06-12 21:51:23,520 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26979 transitions. Word has length 30 [2021-06-12 21:51:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:23,520 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26979 transitions. [2021-06-12 21:51:23,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26979 transitions. [2021-06-12 21:51:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:23,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:23,530 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:23,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-12 21:51:23,730 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1199797958, now seen corresponding path program 158 times [2021-06-12 21:51:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:23,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463203997] [2021-06-12 21:51:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:24,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463203997] [2021-06-12 21:51:24,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463203997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020006652] [2021-06-12 21:51:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:24,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:51:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:24,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:24,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:24,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:51:24,864 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:24,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:24,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:24,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:51:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020006652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:25,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:25,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:51:25,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367800005] [2021-06-12 21:51:25,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:51:25,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:51:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:51:25,057 INFO L87 Difference]: Start difference. First operand 7959 states and 26979 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:27,550 INFO L93 Difference]: Finished difference Result 10150 states and 33983 transitions. [2021-06-12 21:51:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:51:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:27,566 INFO L225 Difference]: With dead ends: 10150 [2021-06-12 21:51:27,566 INFO L226 Difference]: Without dead ends: 10112 [2021-06-12 21:51:27,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1881.2ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:51:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-06-12 21:51:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 7955. [2021-06-12 21:51:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7955 states, 7954 states have (on average 3.3902439024390243) internal successors, (26966), 7954 states have internal predecessors, (26966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 26966 transitions. [2021-06-12 21:51:27,678 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 26966 transitions. Word has length 30 [2021-06-12 21:51:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:27,679 INFO L482 AbstractCegarLoop]: Abstraction has 7955 states and 26966 transitions. [2021-06-12 21:51:27,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 26966 transitions. [2021-06-12 21:51:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:27,688 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:27,688 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:27,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:27,888 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:27,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1608720174, now seen corresponding path program 159 times [2021-06-12 21:51:27,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:27,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347121340] [2021-06-12 21:51:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:28,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347121340] [2021-06-12 21:51:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347121340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815004032] [2021-06-12 21:51:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:28,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:51:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:28,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:51:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:51:29,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:29,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:29,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:29,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:51:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815004032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:29,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609580418] [2021-06-12 21:51:29,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:29,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:29,195 INFO L87 Difference]: Start difference. First operand 7955 states and 26966 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:30,960 INFO L93 Difference]: Finished difference Result 9643 states and 32337 transitions. [2021-06-12 21:51:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:51:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:30,975 INFO L225 Difference]: With dead ends: 9643 [2021-06-12 21:51:30,975 INFO L226 Difference]: Without dead ends: 9622 [2021-06-12 21:51:30,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1531.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:51:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-06-12 21:51:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 7963. [2021-06-12 21:51:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-06-12 21:51:31,082 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-06-12 21:51:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:31,082 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-06-12 21:51:31,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-06-12 21:51:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:31,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:31,091 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:31,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:31,292 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 164387662, now seen corresponding path program 160 times [2021-06-12 21:51:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441558448] [2021-06-12 21:51:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:31,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441558448] [2021-06-12 21:51:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441558448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996175358] [2021-06-12 21:51:31,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:31,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:51:31,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:51:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:32,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:51:32,395 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:32,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:32,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:32,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-12 21:51:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:32,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996175358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:32,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:32,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 21:51:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268082543] [2021-06-12 21:51:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:32,514 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:34,848 INFO L93 Difference]: Finished difference Result 10548 states and 35223 transitions. [2021-06-12 21:51:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:51:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:34,864 INFO L225 Difference]: With dead ends: 10548 [2021-06-12 21:51:34,864 INFO L226 Difference]: Without dead ends: 10498 [2021-06-12 21:51:34,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1737.3ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:51:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-06-12 21:51:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 7965. [2021-06-12 21:51:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.3906328478151684) internal successors, (27003), 7964 states have internal predecessors, (27003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 27003 transitions. [2021-06-12 21:51:34,986 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 27003 transitions. Word has length 30 [2021-06-12 21:51:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:34,986 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 27003 transitions. [2021-06-12 21:51:34,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 27003 transitions. [2021-06-12 21:51:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:34,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:34,995 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:35,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:35,195 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1462747246, now seen corresponding path program 161 times [2021-06-12 21:51:35,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:35,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010316959] [2021-06-12 21:51:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:35,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010316959] [2021-06-12 21:51:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010316959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141572691] [2021-06-12 21:51:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:35,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:51:35,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:36,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:51:36,387 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:36,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:36,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:36,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:51:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:36,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141572691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:36,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:36,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 21:51:36,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001306049] [2021-06-12 21:51:36,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:51:36,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:51:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:51:36,573 INFO L87 Difference]: Start difference. First operand 7965 states and 27003 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:37,710 INFO L93 Difference]: Finished difference Result 10054 states and 33695 transitions. [2021-06-12 21:51:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:51:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:37,725 INFO L225 Difference]: With dead ends: 10054 [2021-06-12 21:51:37,725 INFO L226 Difference]: Without dead ends: 10030 [2021-06-12 21:51:37,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1521.2ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:51:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-12 21:51:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 7959. [2021-06-12 21:51:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.390424729831616) internal successors, (26981), 7958 states have internal predecessors, (26981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26981 transitions. [2021-06-12 21:51:37,838 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26981 transitions. Word has length 30 [2021-06-12 21:51:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:37,838 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26981 transitions. [2021-06-12 21:51:37,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26981 transitions. [2021-06-12 21:51:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:37,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:37,847 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-12 21:51:38,048 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -135761518, now seen corresponding path program 162 times [2021-06-12 21:51:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:38,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755220989] [2021-06-12 21:51:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:38,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:38,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755220989] [2021-06-12 21:51:38,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755220989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:38,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581695115] [2021-06-12 21:51:38,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:38,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:51:38,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:38,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:51:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:39,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:39,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-12 21:51:39,276 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:39,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:39,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:39,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-12 21:51:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581695115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:39,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:39,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-12 21:51:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139879029] [2021-06-12 21:51:39,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:51:39,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:39,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:51:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:51:39,402 INFO L87 Difference]: Start difference. First operand 7959 states and 26981 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:43,636 INFO L93 Difference]: Finished difference Result 10875 states and 36072 transitions. [2021-06-12 21:51:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:51:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:43,653 INFO L225 Difference]: With dead ends: 10875 [2021-06-12 21:51:43,653 INFO L226 Difference]: Without dead ends: 10799 [2021-06-12 21:51:43,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2932.4ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:51:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10799 states. [2021-06-12 21:51:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10799 to 7945. [2021-06-12 21:51:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 3.3908610271903323) internal successors, (26937), 7944 states have internal predecessors, (26937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 26937 transitions. [2021-06-12 21:51:43,778 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 26937 transitions. Word has length 30 [2021-06-12 21:51:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:43,778 INFO L482 AbstractCegarLoop]: Abstraction has 7945 states and 26937 transitions. [2021-06-12 21:51:43,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 26937 transitions. [2021-06-12 21:51:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:43,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:43,787 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:43,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-12 21:51:43,987 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1439356142, now seen corresponding path program 163 times [2021-06-12 21:51:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:43,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004544595] [2021-06-12 21:51:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:44,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004544595] [2021-06-12 21:51:44,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004544595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425188539] [2021-06-12 21:51:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:51:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:45,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:45,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-12 21:51:45,126 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:45,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:45,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:45,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 21:51:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:45,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425188539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:45,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:45,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 21:51:45,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522870568] [2021-06-12 21:51:45,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:51:45,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:51:45,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:51:45,322 INFO L87 Difference]: Start difference. First operand 7945 states and 26937 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:47,489 INFO L93 Difference]: Finished difference Result 10446 states and 34982 transitions. [2021-06-12 21:51:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:51:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:47,505 INFO L225 Difference]: With dead ends: 10446 [2021-06-12 21:51:47,505 INFO L226 Difference]: Without dead ends: 10399 [2021-06-12 21:51:47,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1609.6ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:51:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10399 states. [2021-06-12 21:51:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 7943. [2021-06-12 21:51:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7943 states, 7942 states have (on average 3.390833543188114) internal successors, (26930), 7942 states have internal predecessors, (26930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7943 states to 7943 states and 26930 transitions. [2021-06-12 21:51:47,621 INFO L78 Accepts]: Start accepts. Automaton has 7943 states and 26930 transitions. Word has length 30 [2021-06-12 21:51:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:47,621 INFO L482 AbstractCegarLoop]: Abstraction has 7943 states and 26930 transitions. [2021-06-12 21:51:47,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7943 states and 26930 transitions. [2021-06-12 21:51:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:47,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:47,630 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:47,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:47,831 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1525251902, now seen corresponding path program 164 times [2021-06-12 21:51:47,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:47,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524864936] [2021-06-12 21:51:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:48,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:48,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524864936] [2021-06-12 21:51:48,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524864936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:48,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107294248] [2021-06-12 21:51:48,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:48,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:51:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:51:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:48,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:48,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:51:48,866 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:51:48,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:48,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:48,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 21:51:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:49,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107294248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:49,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:49,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 21:51:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835734269] [2021-06-12 21:51:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:49,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:49,058 INFO L87 Difference]: Start difference. First operand 7943 states and 26930 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:50,963 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-12 21:51:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:52,684 INFO L93 Difference]: Finished difference Result 10822 states and 36180 transitions. [2021-06-12 21:51:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:51:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:52,701 INFO L225 Difference]: With dead ends: 10822 [2021-06-12 21:51:52,701 INFO L226 Difference]: Without dead ends: 10743 [2021-06-12 21:51:52,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2857.9ms TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:51:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2021-06-12 21:51:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 7935. [2021-06-12 21:51:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7935 states, 7934 states have (on average 3.3909755482732544) internal successors, (26904), 7934 states have internal predecessors, (26904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7935 states to 7935 states and 26904 transitions. [2021-06-12 21:51:52,830 INFO L78 Accepts]: Start accepts. Automaton has 7935 states and 26904 transitions. Word has length 30 [2021-06-12 21:51:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:52,830 INFO L482 AbstractCegarLoop]: Abstraction has 7935 states and 26904 transitions. [2021-06-12 21:51:52,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7935 states and 26904 transitions. [2021-06-12 21:51:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:52,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:52,839 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:53,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-12 21:51:53,039 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash -981108774, now seen corresponding path program 165 times [2021-06-12 21:51:53,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:53,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808812080] [2021-06-12 21:51:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:53,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:53,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808812080] [2021-06-12 21:51:53,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808812080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:53,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745825069] [2021-06-12 21:51:53,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:51:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:53,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:51:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:54,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:51:54,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:54,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:54,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:54,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-12 21:51:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:54,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745825069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:54,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:54,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:51:54,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957060929] [2021-06-12 21:51:54,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:51:54,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:51:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:51:54,465 INFO L87 Difference]: Start difference. First operand 7935 states and 26904 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:55,741 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-06-12 21:51:56,200 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 21:51:56,407 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-12 21:51:57,248 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 21:51:57,679 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 21:51:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:51:58,415 INFO L93 Difference]: Finished difference Result 10299 states and 34227 transitions. [2021-06-12 21:51:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:51:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:51:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:51:58,431 INFO L225 Difference]: With dead ends: 10299 [2021-06-12 21:51:58,431 INFO L226 Difference]: Without dead ends: 10284 [2021-06-12 21:51:58,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 3389.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:51:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10284 states. [2021-06-12 21:51:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10284 to 7977. [2021-06-12 21:51:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.3929287863590774) internal successors, (27062), 7976 states have internal predecessors, (27062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27062 transitions. [2021-06-12 21:51:58,544 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27062 transitions. Word has length 30 [2021-06-12 21:51:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:51:58,544 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 27062 transitions. [2021-06-12 21:51:58,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:51:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27062 transitions. [2021-06-12 21:51:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:51:58,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:51:58,553 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:51:58,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-12 21:51:58,753 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:51:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:51:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1752384559, now seen corresponding path program 60 times [2021-06-12 21:51:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:51:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466863862] [2021-06-12 21:51:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:51:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:51:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:59,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:51:59,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466863862] [2021-06-12 21:51:59,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466863862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:59,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125847966] [2021-06-12 21:51:59,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:51:59,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:51:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:51:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:51:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:51:59,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:51:59,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:59,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:51:59,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:51:59,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:51:59,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:51:59,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:51:59,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:51:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:51:59,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125847966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:51:59,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:51:59,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-12 21:51:59,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329772071] [2021-06-12 21:51:59,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:51:59,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:51:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:51:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:51:59,871 INFO L87 Difference]: Start difference. First operand 7977 states and 27062 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:00,400 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 21:52:02,482 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-12 21:52:04,347 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-12 21:52:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:04,876 INFO L93 Difference]: Finished difference Result 10297 states and 33629 transitions. [2021-06-12 21:52:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:52:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:52:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:04,891 INFO L225 Difference]: With dead ends: 10297 [2021-06-12 21:52:04,891 INFO L226 Difference]: Without dead ends: 10260 [2021-06-12 21:52:04,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 3341.4ms TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:52:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2021-06-12 21:52:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 8070. [2021-06-12 21:52:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8070 states, 8069 states have (on average 3.390878671458669) internal successors, (27361), 8069 states have internal predecessors, (27361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 27361 transitions. [2021-06-12 21:52:05,028 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 27361 transitions. Word has length 30 [2021-06-12 21:52:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:05,028 INFO L482 AbstractCegarLoop]: Abstraction has 8070 states and 27361 transitions. [2021-06-12 21:52:05,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 27361 transitions. [2021-06-12 21:52:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:52:05,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:05,037 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:05,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-12 21:52:05,237 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1620264598, now seen corresponding path program 166 times [2021-06-12 21:52:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:05,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93068070] [2021-06-12 21:52:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:06,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:06,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93068070] [2021-06-12 21:52:06,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93068070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:06,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953759400] [2021-06-12 21:52:06,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:06,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:52:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:52:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:06,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:06,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-12 21:52:06,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:52:06,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:06,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:06,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:52:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953759400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:06,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:06,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 21:52:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047261026] [2021-06-12 21:52:06,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:52:06,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:52:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:52:06,585 INFO L87 Difference]: Start difference. First operand 8070 states and 27361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:07,036 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-06-12 21:52:07,893 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-06-12 21:52:08,097 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 21:52:08,567 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 21:52:08,733 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 21:52:09,675 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:52:10,625 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 21:52:11,050 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-12 21:52:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:11,566 INFO L93 Difference]: Finished difference Result 10574 states and 35082 transitions. [2021-06-12 21:52:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:52:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:52:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:11,581 INFO L225 Difference]: With dead ends: 10574 [2021-06-12 21:52:11,582 INFO L226 Difference]: Without dead ends: 10559 [2021-06-12 21:52:11,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 4049.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:52:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-06-12 21:52:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 8087. [2021-06-12 21:52:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8087 states, 8086 states have (on average 3.391540934949295) internal successors, (27424), 8086 states have internal predecessors, (27424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8087 states to 8087 states and 27424 transitions. [2021-06-12 21:52:11,699 INFO L78 Accepts]: Start accepts. Automaton has 8087 states and 27424 transitions. Word has length 30 [2021-06-12 21:52:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:11,699 INFO L482 AbstractCegarLoop]: Abstraction has 8087 states and 27424 transitions. [2021-06-12 21:52:11,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8087 states and 27424 transitions. [2021-06-12 21:52:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:52:11,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:11,709 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:11,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-12 21:52:11,909 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash -869154562, now seen corresponding path program 167 times [2021-06-12 21:52:11,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:11,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722054652] [2021-06-12 21:52:11,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:12,337 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-12 21:52:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:12,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:12,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722054652] [2021-06-12 21:52:12,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722054652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:12,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064497812] [2021-06-12 21:52:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:12,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:52:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:52:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:13,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:13,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:13,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:52:13,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:52:13,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:13,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:13,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-12 21:52:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:13,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064497812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:13,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:13,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-12 21:52:13,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507805115] [2021-06-12 21:52:13,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:52:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:13,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:52:13,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:52:13,211 INFO L87 Difference]: Start difference. First operand 8087 states and 27424 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:13,703 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-06-12 21:52:14,009 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-12 21:52:14,559 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 21:52:14,709 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 21:52:14,966 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-06-12 21:52:15,211 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 21:52:15,668 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 21:52:15,879 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 21:52:16,233 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 21:52:16,414 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-12 21:52:16,938 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 21:52:17,599 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-12 21:52:17,961 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-12 21:52:18,521 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 21:52:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:19,178 INFO L93 Difference]: Finished difference Result 11276 states and 37373 transitions. [2021-06-12 21:52:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:52:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:52:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:19,195 INFO L225 Difference]: With dead ends: 11276 [2021-06-12 21:52:19,195 INFO L226 Difference]: Without dead ends: 11257 [2021-06-12 21:52:19,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 5059.2ms TimeCoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:52:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-06-12 21:52:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8075. [2021-06-12 21:52:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8075 states, 8074 states have (on average 3.390760465692346) internal successors, (27377), 8074 states have internal predecessors, (27377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8075 states to 8075 states and 27377 transitions. [2021-06-12 21:52:19,324 INFO L78 Accepts]: Start accepts. Automaton has 8075 states and 27377 transitions. Word has length 30 [2021-06-12 21:52:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:19,324 INFO L482 AbstractCegarLoop]: Abstraction has 8075 states and 27377 transitions. [2021-06-12 21:52:19,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8075 states and 27377 transitions. [2021-06-12 21:52:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:52:19,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:19,334 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:19,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:19,534 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1957533521, now seen corresponding path program 61 times [2021-06-12 21:52:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:19,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745344217] [2021-06-12 21:52:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:20,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745344217] [2021-06-12 21:52:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745344217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950801493] [2021-06-12 21:52:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:52:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:20,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:20,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:52:20,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 21:52:20,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:52:20,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:20,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:20,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:52:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950801493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:20,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:20,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 21:52:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224611822] [2021-06-12 21:52:20,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:52:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:52:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:52:20,604 INFO L87 Difference]: Start difference. First operand 8075 states and 27377 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:21,159 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 21:52:22,896 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-12 21:52:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:52:24,270 INFO L93 Difference]: Finished difference Result 10786 states and 35782 transitions. [2021-06-12 21:52:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:52:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 21:52:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:52:24,287 INFO L225 Difference]: With dead ends: 10786 [2021-06-12 21:52:24,287 INFO L226 Difference]: Without dead ends: 10771 [2021-06-12 21:52:24,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2565.0ms TimeCoverageRelationStatistics Valid=385, Invalid=2065, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:52:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2021-06-12 21:52:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 8078. [2021-06-12 21:52:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8078 states, 8077 states have (on average 3.391234369196484) internal successors, (27391), 8077 states have internal predecessors, (27391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 27391 transitions. [2021-06-12 21:52:24,446 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 27391 transitions. Word has length 30 [2021-06-12 21:52:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:52:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 8078 states and 27391 transitions. [2021-06-12 21:52:24,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 27391 transitions. [2021-06-12 21:52:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:52:24,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:52:24,456 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:52:24,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:24,656 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:52:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:52:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash -564325939, now seen corresponding path program 62 times [2021-06-12 21:52:24,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:52:24,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517978337] [2021-06-12 21:52:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:52:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:52:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:25,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:52:25,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517978337] [2021-06-12 21:52:25,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517978337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:25,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522169832] [2021-06-12 21:52:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:25,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:52:25,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:52:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:52:25,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:52:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:52:25,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:52:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 21:52:25,739 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:52:25,780 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-06-12 21:52:25,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:52:25,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-12 21:52:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:52:25,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522169832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:52:25,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:52:25,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-12 21:52:25,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102071650] [2021-06-12 21:52:25,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:52:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:52:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:52:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:52:25,885 INFO L87 Difference]: Start difference. First operand 8078 states and 27391 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:52:26,457 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 Received shutdown request... [2021-06-12 21:52:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:52:28,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:52:28,281 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:52:28,283 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:52:28,284 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:52:28,285 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:52:28 BasicIcfg [2021-06-12 21:52:28,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:52:28,285 INFO L168 Benchmark]: Toolchain (without parser) took 818311.32 ms. Allocated memory was 241.2 MB in the beginning and 966.8 MB in the end (delta: 725.6 MB). Free memory was 220.7 MB in the beginning and 267.4 MB in the end (delta: -46.7 MB). Peak memory consumption was 681.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 241.2 MB. Free memory is still 221.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.80 ms. Allocated memory is still 241.2 MB. Free memory was 220.6 MB in the beginning and 219.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L168 Benchmark]: Boogie Preprocessor took 13.63 ms. Allocated memory is still 241.2 MB. Free memory was 219.1 MB in the beginning and 218.1 MB in the end (delta: 946.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L168 Benchmark]: RCFGBuilder took 232.83 ms. Allocated memory is still 241.2 MB. Free memory was 218.1 MB in the beginning and 206.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L168 Benchmark]: TraceAbstraction took 818042.96 ms. Allocated memory was 241.2 MB in the beginning and 966.8 MB in the end (delta: 725.6 MB). Free memory was 206.1 MB in the beginning and 267.4 MB in the end (delta: -61.3 MB). Peak memory consumption was 666.3 MB. Max. memory is 8.0 GB. [2021-06-12 21:52:28,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 241.2 MB. Free memory is still 221.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.80 ms. Allocated memory is still 241.2 MB. Free memory was 220.6 MB in the beginning and 219.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.63 ms. Allocated memory is still 241.2 MB. Free memory was 219.1 MB in the beginning and 218.1 MB in the end (delta: 946.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 232.83 ms. Allocated memory is still 241.2 MB. Free memory was 218.1 MB in the beginning and 206.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 818042.96 ms. Allocated memory was 241.2 MB in the beginning and 966.8 MB in the end (delta: 725.6 MB). Free memory was 206.1 MB in the beginning and 267.4 MB in the end (delta: -61.3 MB). Peak memory consumption was 666.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8078states) and FLOYD_HOARE automaton (currently 26 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (393 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 817984.4ms, OverallIterations: 279, TraceHistogramMax: 2, EmptinessCheckTime: 1971.0ms, AutomataDifference: 568009.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16941 SDtfs, 69933 SDslu, 157088 SDs, 0 SdLazy, 325689 SolverSat, 16855 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 203284.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18628 GetRequests, 5659 SyntacticMatches, 362 SemanticMatches, 12607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231376 ImplicationChecksByTransitivity, 452471.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8087occurred in iteration=276, InterpolantAutomatonStates: 10664, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25561.4ms AutomataMinimizationTime, 278 MinimizatonAttempts, 621820 StatesRemovedByMinimization, 278 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 731.4ms SsaConstructionTime, 2168.1ms SatisfiabilityAnalysisTime, 159633.1ms InterpolantComputationTime, 15987 NumberOfCodeBlocks, 15983 NumberOfCodeBlocksAsserted, 874 NumberOfCheckSat, 15437 ConstructedInterpolants, 276 QuantifiedInterpolants, 237124 SizeOfPredicates, 1881 NumberOfNonLiveVariables, 17512 ConjunctsInSsa, 5895 ConjunctsInUnsatCore, 550 InterpolantComputations, 8 PerfectInterpolantSequences, 198/3865 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown