/usr/bin/java -Xmx16000000000 -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-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:28:02,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:28:02,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:28:02,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:28:02,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:28:02,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:28:02,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:28:02,307 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 [2021-06-05 23:28:02,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:28:02,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:28:02,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:28:02,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:28:02,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:28:02,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:28:02,340 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:28:02,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:28:02,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:28:02,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:28:02,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:28:02,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:28:02,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:28:02,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:28:02,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:28:02,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:28:02,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:28:02,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:28:02,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:28:02,709 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:28:02,710 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:28:02,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2021-06-05 23:28:02,711 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2021-06-05 23:28:02,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:28:02,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:28:02,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:28:02,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:28:02,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:28:02,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:28:02,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:28:02,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:28:02,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:28:02,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/1) ... [2021-06-05 23:28:02,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:28:02,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:28:02,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:28:02,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:28:02,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (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 [2021-06-05 23:28:02,880 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:28:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:28:02,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:28:02,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:28:02,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:28:02,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:28:02,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:28:02,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:28:02,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:28:02,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:28:02,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:28:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:28:02,885 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:28:03,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:28:03,053 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:28:03,055 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:28:03 BoogieIcfgContainer [2021-06-05 23:28:03,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:28:03,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:28:03,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:28:03,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:28:03,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:28:02" (1/2) ... [2021-06-05 23:28:03,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bfabbb and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:28:03, skipping insertion in model container [2021-06-05 23:28:03,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:28:03" (2/2) ... [2021-06-05 23:28:03,061 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-06-05 23:28:03,065 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:28:03,066 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:28:03,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:28:03,066 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:28:03,100 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:28:03,118 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:28:03,133 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:28:03,134 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:28:03,134 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:28:03,134 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:28:03,134 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:28:03,134 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:28:03,134 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:28:03,134 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:28:03,158 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 23:28:03,217 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) [2021-06-05 23:28:03,220 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) [2021-06-05 23:28:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:28:03,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,236 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:03,237 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 761048342, now seen corresponding path program 1 times [2021-06-05 23:28:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931674069] [2021-06-05 23:28:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:03,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931674069] [2021-06-05 23:28:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931674069] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:28:03,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:28:03,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:28:03,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479489447] [2021-06-05 23:28:03,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:28:03,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:28:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:28:03,386 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) [2021-06-05 23:28:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:03,420 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-05 23:28:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:28:03,422 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 [2021-06-05 23:28:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:03,434 INFO L225 Difference]: With dead ends: 298 [2021-06-05 23:28:03,434 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 23:28:03,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:28:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 23:28:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 23:28:03,490 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) [2021-06-05 23:28:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-05 23:28:03,496 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-05 23:28:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:03,497 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-05 23:28:03,497 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) [2021-06-05 23:28:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-05 23:28:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:28:03,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,500 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:03,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:28:03,501 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash 995802333, now seen corresponding path program 1 times [2021-06-05 23:28:03,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686086541] [2021-06-05 23:28:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:03,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686086541] [2021-06-05 23:28:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686086541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:28:03,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:28:03,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:28:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520708788] [2021-06-05 23:28:03,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:28:03,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:28:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:28:03,558 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-06-05 23:28:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:03,630 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-06-05 23:28:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:28:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 [2021-06-05 23:28:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:03,634 INFO L225 Difference]: With dead ends: 249 [2021-06-05 23:28:03,634 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 23:28:03,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:28:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 23:28:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-05 23:28:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-06-05 23:28:03,656 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-06-05 23:28:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:03,657 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-06-05 23:28:03,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-06-05 23:28:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-06-05 23:28:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:28:03,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,659 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:03,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:28:03,660 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash 691559827, now seen corresponding path program 1 times [2021-06-05 23:28:03,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065593999] [2021-06-05 23:28:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:03,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065593999] [2021-06-05 23:28:03,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065593999] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:28:03,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:28:03,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:28:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835041760] [2021-06-05 23:28:03,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:28:03,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:28:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:28:03,724 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 23:28:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:03,772 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-06-05 23:28:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:28:03,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 [2021-06-05 23:28:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:03,775 INFO L225 Difference]: With dead ends: 332 [2021-06-05 23:28:03,775 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 23:28:03,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:28:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 23:28:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-06-05 23:28:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-06-05 23:28:03,809 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-06-05 23:28:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:03,809 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-06-05 23:28:03,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-06-05 23:28:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-06-05 23:28:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:03,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,812 INFO L554 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] [2021-06-05 23:28:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:28:03,812 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2040947820, now seen corresponding path program 1 times [2021-06-05 23:28:03,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955247885] [2021-06-05 23:28:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:04,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955247885] [2021-06-05 23:28:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955247885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158886079] [2021-06-05 23:28:04,274 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 [2021-06-05 23:28:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:04,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:04,649 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 23 treesize of output 19 [2021-06-05 23:28:04,653 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:04,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:04,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:04,663 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 19 treesize of output 15 [2021-06-05 23:28:04,669 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:04,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-06-05 23:28:04,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:04,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:04,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:04,689 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-05 23:28:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:04,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158886079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:04,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:28:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617114316] [2021-06-05 23:28:04,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:28:04,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:28:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:28:04,743 INFO L87 Difference]: Start difference. First operand 260 states and 752 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) [2021-06-05 23:28:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:05,022 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-06-05 23:28:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:28:05,023 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 [2021-06-05 23:28:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:05,027 INFO L225 Difference]: With dead ends: 426 [2021-06-05 23:28:05,027 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 23:28:05,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 23:28:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-06-05 23:28:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-06-05 23:28:05,057 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-06-05 23:28:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:05,057 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-06-05 23:28:05,057 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) [2021-06-05 23:28:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-06-05 23:28:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:05,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:05,060 INFO L554 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] [2021-06-05 23:28:05,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,281 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1459009098, now seen corresponding path program 2 times [2021-06-05 23:28:05,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:05,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102911268] [2021-06-05 23:28:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:05,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102911268] [2021-06-05 23:28:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102911268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439527358] [2021-06-05 23:28:05,586 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 [2021-06-05 23:28:05,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:05,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:05,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:05,826 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 23 treesize of output 27 [2021-06-05 23:28:05,893 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:05,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:05,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:05,915 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 19 treesize of output 23 [2021-06-05 23:28:05,961 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:05,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:05,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:05,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 23:28:05,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:06,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:06,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:06,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-05 23:28:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:06,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439527358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:06,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:06,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 23:28:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145178521] [2021-06-05 23:28:06,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:28:06,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:28:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:28:06,116 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-06-05 23:28:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:06,734 INFO L93 Difference]: Finished difference Result 616 states and 1755 transitions. [2021-06-05 23:28:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 [2021-06-05 23:28:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:06,738 INFO L225 Difference]: With dead ends: 616 [2021-06-05 23:28:06,741 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 23:28:06,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 23:28:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 368. [2021-06-05 23:28:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.915531335149864) internal successors, (1070), 367 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1070 transitions. [2021-06-05 23:28:06,765 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1070 transitions. Word has length 24 [2021-06-05 23:28:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:06,766 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1070 transitions. [2021-06-05 23:28:06,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-06-05 23:28:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1070 transitions. [2021-06-05 23:28:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:06,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:06,774 INFO L554 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] [2021-06-05 23:28:06,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:06,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1585830426, now seen corresponding path program 3 times [2021-06-05 23:28:06,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:06,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738308075] [2021-06-05 23:28:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:07,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738308075] [2021-06-05 23:28:07,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738308075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114120785] [2021-06-05 23:28:07,261 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 [2021-06-05 23:28:07,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:28:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:28:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:07,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,389 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 23 treesize of output 27 [2021-06-05 23:28:07,423 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:07,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,440 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 19 treesize of output 23 [2021-06-05 23:28:07,493 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:07,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 23:28:07,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:07,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:07,543 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-06-05 23:28:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114120785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:07,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:07,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-06-05 23:28:07,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663878150] [2021-06-05 23:28:07,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:28:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:28:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:28:07,599 INFO L87 Difference]: Start difference. First operand 368 states and 1070 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-06-05 23:28:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:08,151 INFO L93 Difference]: Finished difference Result 717 states and 2081 transitions. [2021-06-05 23:28:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 [2021-06-05 23:28:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:08,155 INFO L225 Difference]: With dead ends: 717 [2021-06-05 23:28:08,155 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 23:28:08,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 23:28:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2021-06-05 23:28:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-06-05 23:28:08,168 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-06-05 23:28:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:08,169 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-06-05 23:28:08,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-06-05 23:28:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-06-05 23:28:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:08,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:08,170 INFO L554 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] [2021-06-05 23:28:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:28:08,393 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash 416827498, now seen corresponding path program 4 times [2021-06-05 23:28:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062026803] [2021-06-05 23:28:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:08,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:08,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062026803] [2021-06-05 23:28:08,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062026803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:08,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836592707] [2021-06-05 23:28:08,567 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 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 [2021-06-05 23:28:08,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:08,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:28:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:08,715 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 23 treesize of output 19 [2021-06-05 23:28:08,718 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:08,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:08,737 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 19 treesize of output 15 [2021-06-05 23:28:08,740 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:08,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-06-05 23:28:08,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:08,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:08,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:08,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-05 23:28:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836592707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:28:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282693099] [2021-06-05 23:28:08,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:08,784 INFO L87 Difference]: Start difference. First operand 366 states and 1071 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) [2021-06-05 23:28:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:09,028 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-06-05 23:28:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:28:09,029 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 [2021-06-05 23:28:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:09,032 INFO L225 Difference]: With dead ends: 558 [2021-06-05 23:28:09,032 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 23:28:09,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 23:28:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-06-05 23:28:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-06-05 23:28:09,043 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-06-05 23:28:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:09,044 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-06-05 23:28:09,044 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) [2021-06-05 23:28:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-06-05 23:28:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:09,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:09,045 INFO L554 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] [2021-06-05 23:28:09,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:09,273 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2079136470, now seen corresponding path program 5 times [2021-06-05 23:28:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434290051] [2021-06-05 23:28:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434290051] [2021-06-05 23:28:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434290051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104142579] [2021-06-05 23:28:09,512 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 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 [2021-06-05 23:28:09,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:28:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:09,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,669 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 27 treesize of output 31 [2021-06-05 23:28:09,694 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:09,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,714 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 23 treesize of output 27 [2021-06-05 23:28:09,742 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:09,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 23 [2021-06-05 23:28:09,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:09,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:09,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:45 [2021-06-05 23:28:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104142579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:09,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:28:09,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876120862] [2021-06-05 23:28:09,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:09,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:09,889 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-06-05 23:28:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:10,300 INFO L93 Difference]: Finished difference Result 681 states and 1985 transitions. [2021-06-05 23:28:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 [2021-06-05 23:28:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:10,305 INFO L225 Difference]: With dead ends: 681 [2021-06-05 23:28:10,305 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 23:28:10,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 23:28:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-06-05 23:28:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-06-05 23:28:10,318 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-06-05 23:28:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:10,318 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-06-05 23:28:10,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-06-05 23:28:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-06-05 23:28:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:10,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:10,320 INFO L554 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] [2021-06-05 23:28:10,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:28:10,544 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 430819029, now seen corresponding path program 6 times [2021-06-05 23:28:10,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:10,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046479473] [2021-06-05 23:28:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046479473] [2021-06-05 23:28:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046479473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104659093] [2021-06-05 23:28:10,617 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 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 [2021-06-05 23:28:10,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:28:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104659093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:10,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:10,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309345473] [2021-06-05 23:28:10,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:10,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:10,748 INFO L87 Difference]: Start difference. First operand 390 states and 1143 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) [2021-06-05 23:28:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:11,182 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-06-05 23:28:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:28:11,183 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 [2021-06-05 23:28:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:11,188 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 23:28:11,188 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 23:28:11,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:28:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 23:28:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-06-05 23:28:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-06-05 23:28:11,205 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-06-05 23:28:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:11,205 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-06-05 23:28:11,205 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) [2021-06-05 23:28:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-06-05 23:28:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:11,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:11,207 INFO L554 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] [2021-06-05 23:28:11,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:11,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash 919339717, now seen corresponding path program 7 times [2021-06-05 23:28:11,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:11,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422346321] [2021-06-05 23:28:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:11,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:11,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422346321] [2021-06-05 23:28:11,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422346321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:11,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484597818] [2021-06-05 23:28:11,480 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 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 [2021-06-05 23:28:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:11,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484597818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:11,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:11,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142258532] [2021-06-05 23:28:11,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:11,611 INFO L87 Difference]: Start difference. First operand 509 states and 1559 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) [2021-06-05 23:28:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:12,443 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-06-05 23:28:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:28:12,444 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 [2021-06-05 23:28:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:12,453 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 23:28:12,453 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 23:28:12,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:28:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 23:28:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-06-05 23:28:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-06-05 23:28:12,482 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-06-05 23:28:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:12,482 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-06-05 23:28:12,482 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) [2021-06-05 23:28:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-06-05 23:28:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:12,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:12,484 INFO L554 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] [2021-06-05 23:28:12,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:28:12,707 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash 725439049, now seen corresponding path program 8 times [2021-06-05 23:28:12,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:12,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499927740] [2021-06-05 23:28:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:12,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499927740] [2021-06-05 23:28:12,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499927740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631106741] [2021-06-05 23:28:12,761 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 [2021-06-05 23:28:12,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631106741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:12,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:12,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132626731] [2021-06-05 23:28:12,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:12,921 INFO L87 Difference]: Start difference. First operand 515 states and 1589 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) [2021-06-05 23:28:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:13,614 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-06-05 23:28:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:28:13,615 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 [2021-06-05 23:28:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:13,622 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 23:28:13,622 INFO L226 Difference]: Without dead ends: 1842 [2021-06-05 23:28:13,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:28:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-05 23:28:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-06-05 23:28:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-06-05 23:28:13,643 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-06-05 23:28:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:13,644 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-06-05 23:28:13,644 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) [2021-06-05 23:28:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-06-05 23:28:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:13,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:13,645 INFO L554 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] [2021-06-05 23:28:13,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 23:28:13,869 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 682299666, now seen corresponding path program 1 times [2021-06-05 23:28:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:13,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480984295] [2021-06-05 23:28:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:13,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480984295] [2021-06-05 23:28:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480984295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158526876] [2021-06-05 23:28:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 23:28:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:13,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:28:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158526876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:13,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:13,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:28:13,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677596217] [2021-06-05 23:28:13,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:28:13,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:28:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:28:13,995 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:14,136 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-06-05 23:28:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:28:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 [2021-06-05 23:28:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:14,142 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 23:28:14,142 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 23:28:14,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 23:28:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-06-05 23:28:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-06-05 23:28:14,163 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-06-05 23:28:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:14,163 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-06-05 23:28:14,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-06-05 23:28:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:14,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:14,165 INFO L554 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] [2021-06-05 23:28:14,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:28:14,389 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash -542744963, now seen corresponding path program 9 times [2021-06-05 23:28:14,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:14,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811424957] [2021-06-05 23:28:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:14,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:14,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811424957] [2021-06-05 23:28:14,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811424957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677781627] [2021-06-05 23:28:14,435 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 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 [2021-06-05 23:28:14,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:28:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:14,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677781627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:14,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:28:14,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852513107] [2021-06-05 23:28:14,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:14,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:14,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:14,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:14,546 INFO L87 Difference]: Start difference. First operand 784 states and 2488 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) [2021-06-05 23:28:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:14,722 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-06-05 23:28:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:14,722 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 [2021-06-05 23:28:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:14,728 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 23:28:14,728 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 23:28:14,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:28:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 23:28:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-06-05 23:28:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-06-05 23:28:14,753 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-06-05 23:28:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:14,753 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-06-05 23:28:14,754 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) [2021-06-05 23:28:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-06-05 23:28:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:14,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:14,756 INFO L554 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] [2021-06-05 23:28:14,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:14,969 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1956507318, now seen corresponding path program 2 times [2021-06-05 23:28:14,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:14,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647198876] [2021-06-05 23:28:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:15,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:15,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647198876] [2021-06-05 23:28:15,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647198876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136867440] [2021-06-05 23:28:15,002 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 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 [2021-06-05 23:28:15,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:15,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:28:15,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:15,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136867440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:15,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:28:15,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075681310] [2021-06-05 23:28:15,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:28:15,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:15,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:28:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:28:15,113 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:15,233 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-06-05 23:28:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:28:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 [2021-06-05 23:28:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:15,240 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 23:28:15,241 INFO L226 Difference]: Without dead ends: 1478 [2021-06-05 23:28:15,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-05 23:28:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-06-05 23:28:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-06-05 23:28:15,269 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-06-05 23:28:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:15,269 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-06-05 23:28:15,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-06-05 23:28:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:15,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:15,273 INFO L554 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] [2021-06-05 23:28:15,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:28:15,489 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:15,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2118816535, now seen corresponding path program 10 times [2021-06-05 23:28:15,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:15,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614110325] [2021-06-05 23:28:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:15,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614110325] [2021-06-05 23:28:15,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614110325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355227364] [2021-06-05 23:28:15,533 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 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 [2021-06-05 23:28:15,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355227364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:15,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092258371] [2021-06-05 23:28:15,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:15,652 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 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) [2021-06-05 23:28:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:15,999 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-06-05 23:28:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:28:15,999 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 [2021-06-05 23:28:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:16,008 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 23:28:16,008 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 23:28:16,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 23:28:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-06-05 23:28:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-06-05 23:28:16,040 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-06-05 23:28:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:16,041 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-06-05 23:28:16,041 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) [2021-06-05 23:28:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-06-05 23:28:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:16,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:16,043 INFO L554 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] [2021-06-05 23:28:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:16,257 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2031092163, now seen corresponding path program 11 times [2021-06-05 23:28:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818019925] [2021-06-05 23:28:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:16,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818019925] [2021-06-05 23:28:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818019925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121290824] [2021-06-05 23:28:16,297 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 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 [2021-06-05 23:28:16,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:28:16,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:16,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:16,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121290824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:16,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:16,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019676129] [2021-06-05 23:28:16,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:16,428 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 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) [2021-06-05 23:28:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:16,959 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-06-05 23:28:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:28:16,960 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 [2021-06-05 23:28:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:16,970 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 23:28:16,971 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 23:28:16,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:28:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 23:28:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-06-05 23:28:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-06-05 23:28:17,007 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-06-05 23:28:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:17,007 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-06-05 23:28:17,007 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) [2021-06-05 23:28:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-06-05 23:28:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:17,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:17,010 INFO L554 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] [2021-06-05 23:28:17,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:28:17,229 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1703761887, now seen corresponding path program 12 times [2021-06-05 23:28:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:17,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46053325] [2021-06-05 23:28:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:17,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46053325] [2021-06-05 23:28:17,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46053325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245426772] [2021-06-05 23:28:17,272 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 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 [2021-06-05 23:28:17,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 23:28:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245426772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:17,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:28:17,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19212850] [2021-06-05 23:28:17,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:17,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:17,403 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 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) [2021-06-05 23:28:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:17,649 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-06-05 23:28:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:28:17,650 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 [2021-06-05 23:28:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:17,657 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 23:28:17,657 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 23:28:17,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 23:28:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-06-05 23:28:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-06-05 23:28:17,701 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-06-05 23:28:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:17,701 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-06-05 23:28:17,701 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) [2021-06-05 23:28:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-06-05 23:28:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:17,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:17,705 INFO L554 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] [2021-06-05 23:28:17,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:17,929 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:17,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1641907719, now seen corresponding path program 13 times [2021-06-05 23:28:17,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:17,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754324946] [2021-06-05 23:28:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:17,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754324946] [2021-06-05 23:28:17,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754324946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456599717] [2021-06-05 23:28:17,967 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 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 [2021-06-05 23:28:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456599717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:18,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:18,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:28:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385873835] [2021-06-05 23:28:18,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:18,076 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 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) [2021-06-05 23:28:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:18,385 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-06-05 23:28:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:28:18,386 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 [2021-06-05 23:28:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:18,392 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 23:28:18,392 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 23:28:18,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:28:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 23:28:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-06-05 23:28:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-06-05 23:28:18,434 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-06-05 23:28:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:18,435 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-06-05 23:28:18,435 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) [2021-06-05 23:28:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-06-05 23:28:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:18,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:18,438 INFO L554 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] [2021-06-05 23:28:18,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:28:18,663 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash 481161223, now seen corresponding path program 14 times [2021-06-05 23:28:18,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:18,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693725154] [2021-06-05 23:28:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:18,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693725154] [2021-06-05 23:28:18,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693725154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:18,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056975553] [2021-06-05 23:28:18,704 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 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 [2021-06-05 23:28:18,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:18,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056975553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:18,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:18,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865106968] [2021-06-05 23:28:18,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:18,808 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 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) [2021-06-05 23:28:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:19,206 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-06-05 23:28:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:28:19,206 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 [2021-06-05 23:28:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:19,214 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 23:28:19,214 INFO L226 Difference]: Without dead ends: 3070 [2021-06-05 23:28:19,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:28:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-05 23:28:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-06-05 23:28:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-06-05 23:28:19,261 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-06-05 23:28:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:19,262 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-06-05 23:28:19,262 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) [2021-06-05 23:28:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-06-05 23:28:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:19,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:19,265 INFO L554 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] [2021-06-05 23:28:19,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:19,481 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1748600121, now seen corresponding path program 15 times [2021-06-05 23:28:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:19,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758397858] [2021-06-05 23:28:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758397858] [2021-06-05 23:28:19,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758397858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283978306] [2021-06-05 23:28:19,524 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 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 [2021-06-05 23:28:19,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:28:19,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283978306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:19,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:19,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163068559] [2021-06-05 23:28:19,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:19,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:19,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:19,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:19,662 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 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) [2021-06-05 23:28:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:20,530 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-06-05 23:28:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:28:20,530 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 [2021-06-05 23:28:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:20,543 INFO L225 Difference]: With dead ends: 5541 [2021-06-05 23:28:20,543 INFO L226 Difference]: Without dead ends: 5541 [2021-06-05 23:28:20,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:28:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-06-05 23:28:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-06-05 23:28:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-06-05 23:28:20,614 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-06-05 23:28:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:20,614 INFO L482 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-06-05 23:28:20,614 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) [2021-06-05 23:28:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-06-05 23:28:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:20,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:20,619 INFO L554 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] [2021-06-05 23:28:20,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:28:20,833 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1942500789, now seen corresponding path program 16 times [2021-06-05 23:28:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:20,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049170565] [2021-06-05 23:28:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:20,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:20,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049170565] [2021-06-05 23:28:20,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049170565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:20,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026325087] [2021-06-05 23:28:20,881 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 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 [2021-06-05 23:28:20,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:20,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026325087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:21,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455560058] [2021-06-05 23:28:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:21,006 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 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) [2021-06-05 23:28:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:21,871 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-06-05 23:28:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:28:21,872 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 [2021-06-05 23:28:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:21,887 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 23:28:21,887 INFO L226 Difference]: Without dead ends: 5525 [2021-06-05 23:28:21,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:28:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-05 23:28:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-06-05 23:28:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-06-05 23:28:21,967 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-06-05 23:28:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:21,968 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-06-05 23:28:21,968 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) [2021-06-05 23:28:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-06-05 23:28:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:21,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:21,972 INFO L554 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] [2021-06-05 23:28:22,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:28:22,185 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1980556741, now seen corresponding path program 17 times [2021-06-05 23:28:22,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:22,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903202868] [2021-06-05 23:28:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:22,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903202868] [2021-06-05 23:28:22,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903202868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:22,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180007106] [2021-06-05 23:28:22,224 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 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 [2021-06-05 23:28:22,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:28:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:22,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180007106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:22,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:22,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930355370] [2021-06-05 23:28:22,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:22,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:22,345 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:23,098 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-06-05 23:28:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:28:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-05 23:28:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:23,109 INFO L225 Difference]: With dead ends: 5112 [2021-06-05 23:28:23,110 INFO L226 Difference]: Without dead ends: 5112 [2021-06-05 23:28:23,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:28:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-06-05 23:28:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-06-05 23:28:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-06-05 23:28:23,184 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-06-05 23:28:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:23,184 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-06-05 23:28:23,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-06-05 23:28:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:23,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:23,189 INFO L554 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] [2021-06-05 23:28:23,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:28:23,412 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1791338443, now seen corresponding path program 18 times [2021-06-05 23:28:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:23,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763015748] [2021-06-05 23:28:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:23,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:23,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763015748] [2021-06-05 23:28:23,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763015748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:23,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385102547] [2021-06-05 23:28:23,452 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 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 [2021-06-05 23:28:23,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:23,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385102547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:23,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:23,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:23,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634947250] [2021-06-05 23:28:23,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:23,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:23,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:23,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:23,567 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:24,293 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-06-05 23:28:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:28:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-05 23:28:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:24,301 INFO L225 Difference]: With dead ends: 4837 [2021-06-05 23:28:24,301 INFO L226 Difference]: Without dead ends: 4833 [2021-06-05 23:28:24,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:28:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-06-05 23:28:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-06-05 23:28:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-06-05 23:28:24,359 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-06-05 23:28:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:24,360 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-06-05 23:28:24,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-06-05 23:28:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:24,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:24,364 INFO L554 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] [2021-06-05 23:28:24,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 23:28:24,585 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1114107637, now seen corresponding path program 19 times [2021-06-05 23:28:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116324750] [2021-06-05 23:28:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:24,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116324750] [2021-06-05 23:28:24,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116324750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86431818] [2021-06-05 23:28:24,628 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 [2021-06-05 23:28:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:24,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86431818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:24,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:24,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307470119] [2021-06-05 23:28:24,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:24,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:24,759 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 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) [2021-06-05 23:28:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:25,543 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-06-05 23:28:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:28:25,544 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 [2021-06-05 23:28:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:25,553 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 23:28:25,553 INFO L226 Difference]: Without dead ends: 4879 [2021-06-05 23:28:25,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:28:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-05 23:28:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-06-05 23:28:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-06-05 23:28:25,616 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-06-05 23:28:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:25,616 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-06-05 23:28:25,616 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) [2021-06-05 23:28:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-06-05 23:28:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:25,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:25,621 INFO L554 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] [2021-06-05 23:28:25,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:25,837 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash 668541833, now seen corresponding path program 20 times [2021-06-05 23:28:25,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:25,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091862027] [2021-06-05 23:28:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091862027] [2021-06-05 23:28:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091862027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108192098] [2021-06-05 23:28:25,875 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 [2021-06-05 23:28:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108192098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:25,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:25,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777436384] [2021-06-05 23:28:25,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:25,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:25,993 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 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) [2021-06-05 23:28:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:26,719 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-06-05 23:28:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:28:26,719 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 [2021-06-05 23:28:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:26,725 INFO L225 Difference]: With dead ends: 4586 [2021-06-05 23:28:26,726 INFO L226 Difference]: Without dead ends: 4582 [2021-06-05 23:28:26,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:28:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-06-05 23:28:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-06-05 23:28:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-06-05 23:28:26,779 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-06-05 23:28:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:26,779 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-06-05 23:28:26,779 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) [2021-06-05 23:28:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-06-05 23:28:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:26,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:26,783 INFO L554 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] [2021-06-05 23:28:27,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:27,007 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash -393874732, now seen corresponding path program 3 times [2021-06-05 23:28:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:27,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047180065] [2021-06-05 23:28:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047180065] [2021-06-05 23:28:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047180065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189123964] [2021-06-05 23:28:27,041 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 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 [2021-06-05 23:28:27,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:28:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:28:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:27,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189123964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:27,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:28:27,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357967715] [2021-06-05 23:28:27,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:28:27,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:28:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:28:27,130 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:27,224 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-06-05 23:28:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:28:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 [2021-06-05 23:28:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:27,227 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 23:28:27,227 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 23:28:27,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 23:28:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-06-05 23:28:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-06-05 23:28:27,250 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-06-05 23:28:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:27,250 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-06-05 23:28:27,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 23:28:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-06-05 23:28:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:27,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:27,253 INFO L554 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] [2021-06-05 23:28:27,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 23:28:27,470 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1713019731, now seen corresponding path program 21 times [2021-06-05 23:28:27,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:27,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674032062] [2021-06-05 23:28:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:27,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:27,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674032062] [2021-06-05 23:28:27,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674032062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542567395] [2021-06-05 23:28:27,517 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 [2021-06-05 23:28:27,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:28:27,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542567395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:27,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:28:27,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323048335] [2021-06-05 23:28:27,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:28:27,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:28:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:28:27,629 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 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) [2021-06-05 23:28:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:27,941 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-06-05 23:28:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:28:27,942 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 [2021-06-05 23:28:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:27,945 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 23:28:27,945 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 23:28:27,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:28:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 23:28:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-06-05 23:28:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-06-05 23:28:27,972 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-06-05 23:28:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:27,973 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-06-05 23:28:27,973 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) [2021-06-05 23:28:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-06-05 23:28:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:27,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:27,976 INFO L554 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] [2021-06-05 23:28:28,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:28,193 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1929419657, now seen corresponding path program 22 times [2021-06-05 23:28:28,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:28,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020447800] [2021-06-05 23:28:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020447800] [2021-06-05 23:28:28,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020447800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134114688] [2021-06-05 23:28:28,257 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 [2021-06-05 23:28:28,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:28,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134114688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:28,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:28:28,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451847427] [2021-06-05 23:28:28,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:28:28,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:28:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:28:28,358 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-06-05 23:28:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:28,644 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-06-05 23:28:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:28:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 [2021-06-05 23:28:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:28,649 INFO L225 Difference]: With dead ends: 3165 [2021-06-05 23:28:28,649 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 23:28:28,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 23:28:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-06-05 23:28:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-06-05 23:28:28,689 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-06-05 23:28:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:28,690 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-06-05 23:28:28,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-06-05 23:28:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-06-05 23:28:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:28,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:28,693 INFO L554 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] [2021-06-05 23:28:28,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:28:28,896 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 815616699, now seen corresponding path program 23 times [2021-06-05 23:28:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:28,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502462234] [2021-06-05 23:28:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:28,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502462234] [2021-06-05 23:28:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502462234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291050326] [2021-06-05 23:28:28,933 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 [2021-06-05 23:28:28,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:29,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291050326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:29,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:28:29,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910389481] [2021-06-05 23:28:29,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:28:29,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:28:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:28:29,024 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-06-05 23:28:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:29,254 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-06-05 23:28:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:28:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 [2021-06-05 23:28:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:29,258 INFO L225 Difference]: With dead ends: 3029 [2021-06-05 23:28:29,258 INFO L226 Difference]: Without dead ends: 3025 [2021-06-05 23:28:29,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-06-05 23:28:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-06-05 23:28:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-06-05 23:28:29,287 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-06-05 23:28:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:29,287 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-06-05 23:28:29,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-06-05 23:28:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-06-05 23:28:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:29,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:29,291 INFO L554 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] [2021-06-05 23:28:29,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:29,505 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1987345865, now seen corresponding path program 24 times [2021-06-05 23:28:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464356147] [2021-06-05 23:28:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:29,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464356147] [2021-06-05 23:28:29,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464356147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835431700] [2021-06-05 23:28:29,536 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 [2021-06-05 23:28:29,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:29,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835431700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:29,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:28:29,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744471823] [2021-06-05 23:28:29,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:28:29,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:28:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:28:29,622 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 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) [2021-06-05 23:28:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:29,871 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-06-05 23:28:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:28:29,871 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 [2021-06-05 23:28:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:29,876 INFO L225 Difference]: With dead ends: 3009 [2021-06-05 23:28:29,876 INFO L226 Difference]: Without dead ends: 2993 [2021-06-05 23:28:29,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-06-05 23:28:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-06-05 23:28:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-06-05 23:28:29,907 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-06-05 23:28:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-06-05 23:28:29,907 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) [2021-06-05 23:28:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-06-05 23:28:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:29,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:29,910 INFO L554 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] [2021-06-05 23:28:30,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 23:28:30,129 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 353835191, now seen corresponding path program 25 times [2021-06-05 23:28:30,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:30,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613557324] [2021-06-05 23:28:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:30,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613557324] [2021-06-05 23:28:30,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613557324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171817243] [2021-06-05 23:28:30,174 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 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 [2021-06-05 23:28:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171817243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:30,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:30,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:30,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164749654] [2021-06-05 23:28:30,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:30,286 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 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) [2021-06-05 23:28:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:30,871 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-06-05 23:28:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:28:30,885 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 [2021-06-05 23:28:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:30,892 INFO L225 Difference]: With dead ends: 5256 [2021-06-05 23:28:30,893 INFO L226 Difference]: Without dead ends: 5256 [2021-06-05 23:28:30,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:28:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-05 23:28:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-06-05 23:28:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-06-05 23:28:30,931 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-06-05 23:28:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:30,931 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-06-05 23:28:30,931 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) [2021-06-05 23:28:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-06-05 23:28:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:30,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:30,934 INFO L554 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] [2021-06-05 23:28:31,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:31,137 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash 159934523, now seen corresponding path program 26 times [2021-06-05 23:28:31,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:31,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274767395] [2021-06-05 23:28:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:31,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274767395] [2021-06-05 23:28:31,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274767395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662317662] [2021-06-05 23:28:31,174 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 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 [2021-06-05 23:28:31,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:31,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:31,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:31,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662317662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:31,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:31,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712692742] [2021-06-05 23:28:31,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:31,296 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 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) [2021-06-05 23:28:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:31,796 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-06-05 23:28:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:28:31,797 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 [2021-06-05 23:28:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:31,804 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 23:28:31,804 INFO L226 Difference]: Without dead ends: 5169 [2021-06-05 23:28:31,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:28:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-06-05 23:28:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-06-05 23:28:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:28:31,846 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:28:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:31,846 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:28:31,846 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) [2021-06-05 23:28:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:28:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:31,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:31,849 INFO L554 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] [2021-06-05 23:28:32,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:28:32,049 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash -211975243, now seen corresponding path program 27 times [2021-06-05 23:28:32,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:32,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074515439] [2021-06-05 23:28:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:32,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074515439] [2021-06-05 23:28:32,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074515439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954930704] [2021-06-05 23:28:32,084 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 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 [2021-06-05 23:28:32,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:28:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954930704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:32,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392001973] [2021-06-05 23:28:32,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:32,186 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:32,643 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-06-05 23:28:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:28:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-05 23:28:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:32,649 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 23:28:32,650 INFO L226 Difference]: Without dead ends: 4755 [2021-06-05 23:28:32,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:28:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-06-05 23:28:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-06-05 23:28:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 23:28:32,708 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 23:28:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:32,708 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 23:28:32,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 23:28:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:32,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:32,711 INFO L554 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] [2021-06-05 23:28:32,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:32,912 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:32,912 INFO L82 PathProgramCache]: Analyzing trace with hash -401193541, now seen corresponding path program 28 times [2021-06-05 23:28:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:32,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479761381] [2021-06-05 23:28:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479761381] [2021-06-05 23:28:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479761381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010393797] [2021-06-05 23:28:32,948 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 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 [2021-06-05 23:28:32,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:32,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010393797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:33,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:33,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862946779] [2021-06-05 23:28:33,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:33,048 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:33,466 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-06-05 23:28:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:28:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-05 23:28:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:33,472 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 23:28:33,472 INFO L226 Difference]: Without dead ends: 4602 [2021-06-05 23:28:33,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:28:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-06-05 23:28:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-06-05 23:28:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:28:33,509 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:28:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:33,509 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:28:33,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-05 23:28:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:28:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:33,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:33,512 INFO L554 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] [2021-06-05 23:28:33,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:33,712 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 988327675, now seen corresponding path program 29 times [2021-06-05 23:28:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:33,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477163666] [2021-06-05 23:28:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477163666] [2021-06-05 23:28:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477163666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135330682] [2021-06-05 23:28:33,759 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 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 [2021-06-05 23:28:33,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135330682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:33,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:33,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472674287] [2021-06-05 23:28:33,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:33,880 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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) [2021-06-05 23:28:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:34,384 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-06-05 23:28:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:28:34,385 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 [2021-06-05 23:28:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:34,391 INFO L225 Difference]: With dead ends: 4605 [2021-06-05 23:28:34,391 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 23:28:34,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:28:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 23:28:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-06-05 23:28:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 23:28:34,442 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 23:28:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:34,442 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 23:28:34,442 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) [2021-06-05 23:28:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 23:28:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:34,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:34,446 INFO L554 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] [2021-06-05 23:28:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 23:28:34,661 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1523990151, now seen corresponding path program 30 times [2021-06-05 23:28:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868132351] [2021-06-05 23:28:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868132351] [2021-06-05 23:28:34,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868132351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973899187] [2021-06-05 23:28:34,697 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 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 [2021-06-05 23:28:34,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:34,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973899187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:34,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:34,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389833048] [2021-06-05 23:28:34,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:34,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:34,798 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 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) [2021-06-05 23:28:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:35,177 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-06-05 23:28:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:28:35,177 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 [2021-06-05 23:28:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:35,184 INFO L225 Difference]: With dead ends: 4532 [2021-06-05 23:28:35,184 INFO L226 Difference]: Without dead ends: 4528 [2021-06-05 23:28:35,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-06-05 23:28:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-06-05 23:28:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 23:28:35,221 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 23:28:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:35,222 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 23:28:35,222 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) [2021-06-05 23:28:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 23:28:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:35,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:35,224 INFO L554 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] [2021-06-05 23:28:35,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:35,429 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash -480721671, now seen corresponding path program 31 times [2021-06-05 23:28:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:35,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637615525] [2021-06-05 23:28:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:35,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:35,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637615525] [2021-06-05 23:28:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637615525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:35,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592425401] [2021-06-05 23:28:35,462 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 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 [2021-06-05 23:28:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:35,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592425401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:35,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:35,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478473680] [2021-06-05 23:28:35,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:35,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:35,544 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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) [2021-06-05 23:28:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:35,926 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-06-05 23:28:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:28:35,926 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 [2021-06-05 23:28:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:35,932 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 23:28:35,932 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 23:28:35,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:28:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 23:28:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-06-05 23:28:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-06-05 23:28:35,989 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-06-05 23:28:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:35,989 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-06-05 23:28:35,989 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) [2021-06-05 23:28:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-06-05 23:28:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:35,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:35,994 INFO L554 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] [2021-06-05 23:28:36,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 23:28:36,218 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash -669939969, now seen corresponding path program 32 times [2021-06-05 23:28:36,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:36,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734928836] [2021-06-05 23:28:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:36,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734928836] [2021-06-05 23:28:36,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734928836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061231865] [2021-06-05 23:28:36,257 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 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 [2021-06-05 23:28:36,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:36,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061231865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:36,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:36,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404520258] [2021-06-05 23:28:36,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:36,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:36,350 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 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) [2021-06-05 23:28:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:36,703 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-06-05 23:28:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:28:36,703 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 [2021-06-05 23:28:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:36,709 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 23:28:36,710 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 23:28:36,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 23:28:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-06-05 23:28:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-06-05 23:28:36,752 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-06-05 23:28:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:36,752 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-06-05 23:28:36,752 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) [2021-06-05 23:28:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-06-05 23:28:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:36,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:36,756 INFO L554 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] [2021-06-05 23:28:36,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:36,956 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash -26557709, now seen corresponding path program 33 times [2021-06-05 23:28:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:36,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776558134] [2021-06-05 23:28:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:36,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776558134] [2021-06-05 23:28:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776558134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469443318] [2021-06-05 23:28:36,996 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:37,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:28:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:37,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469443318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:37,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:28:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106031649] [2021-06-05 23:28:37,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:28:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:37,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:28:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:28:37,089 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 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) [2021-06-05 23:28:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:37,364 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-06-05 23:28:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:28:37,365 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 [2021-06-05 23:28:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:37,370 INFO L225 Difference]: With dead ends: 3687 [2021-06-05 23:28:37,370 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 23:28:37,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 23:28:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-06-05 23:28:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-06-05 23:28:37,403 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-06-05 23:28:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:37,404 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-06-05 23:28:37,404 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) [2021-06-05 23:28:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-06-05 23:28:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:37,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:37,407 INFO L554 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] [2021-06-05 23:28:37,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 23:28:37,608 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 285798263, now seen corresponding path program 34 times [2021-06-05 23:28:37,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:37,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601561049] [2021-06-05 23:28:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:37,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:37,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601561049] [2021-06-05 23:28:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601561049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277955208] [2021-06-05 23:28:37,647 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 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 [2021-06-05 23:28:37,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277955208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427781482] [2021-06-05 23:28:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:37,755 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 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) [2021-06-05 23:28:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:38,107 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-06-05 23:28:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:28:38,108 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 [2021-06-05 23:28:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:38,114 INFO L225 Difference]: With dead ends: 3798 [2021-06-05 23:28:38,114 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 23:28:38,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 23:28:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-06-05 23:28:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-06-05 23:28:38,159 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-06-05 23:28:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:38,159 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-06-05 23:28:38,159 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) [2021-06-05 23:28:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-06-05 23:28:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:38,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:38,163 INFO L554 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] [2021-06-05 23:28:38,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 23:28:38,364 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2068447733, now seen corresponding path program 35 times [2021-06-05 23:28:38,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:38,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094530463] [2021-06-05 23:28:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:38,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:38,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094530463] [2021-06-05 23:28:38,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094530463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171927618] [2021-06-05 23:28:38,399 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 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 [2021-06-05 23:28:38,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:38,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:38,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171927618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:38,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:28:38,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423919175] [2021-06-05 23:28:38,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:28:38,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:28:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:28:38,499 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 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) [2021-06-05 23:28:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:38,834 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-06-05 23:28:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:28:38,835 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 [2021-06-05 23:28:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:38,839 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 23:28:38,839 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 23:28:38,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 23:28:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-06-05 23:28:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-06-05 23:28:38,878 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-06-05 23:28:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:38,878 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-06-05 23:28:38,878 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) [2021-06-05 23:28:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-06-05 23:28:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:28:38,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:38,881 INFO L554 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] [2021-06-05 23:28:39,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:39,082 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476281, now seen corresponding path program 36 times [2021-06-05 23:28:39,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:39,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195891454] [2021-06-05 23:28:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:39,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195891454] [2021-06-05 23:28:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195891454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493029134] [2021-06-05 23:28:39,122 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 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 [2021-06-05 23:28:39,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:39,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:39,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:28:39,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493029134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:28:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061570923] [2021-06-05 23:28:39,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:28:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:28:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:28:39,222 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 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) [2021-06-05 23:28:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:39,458 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-06-05 23:28:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:28:39,458 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 [2021-06-05 23:28:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:39,467 INFO L225 Difference]: With dead ends: 3553 [2021-06-05 23:28:39,468 INFO L226 Difference]: Without dead ends: 3537 [2021-06-05 23:28:39,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-05 23:28:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-06-05 23:28:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-06-05 23:28:39,518 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-06-05 23:28:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:39,518 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-06-05 23:28:39,518 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) [2021-06-05 23:28:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-06-05 23:28:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:39,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:39,523 INFO L554 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] [2021-06-05 23:28:39,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 23:28:39,745 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -469751287, now seen corresponding path program 4 times [2021-06-05 23:28:39,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:39,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287694365] [2021-06-05 23:28:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:40,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287694365] [2021-06-05 23:28:40,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287694365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325589433] [2021-06-05 23:28:40,147 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 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 [2021-06-05 23:28:40,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:40,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:40,388 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 43 treesize of output 35 [2021-06-05 23:28:40,391 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:40,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:40,400 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 35 treesize of output 27 [2021-06-05 23:28:40,402 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:40,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:40,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:40,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:28:40,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:40,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:40,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:40,435 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:28:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325589433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:40,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:28:40,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023469315] [2021-06-05 23:28:40,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:28:40,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:28:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:28:40,469 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 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) [2021-06-05 23:28:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:41,398 INFO L93 Difference]: Finished difference Result 3240 states and 10404 transitions. [2021-06-05 23:28:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:28:41,398 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 [2021-06-05 23:28:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:41,403 INFO L225 Difference]: With dead ends: 3240 [2021-06-05 23:28:41,403 INFO L226 Difference]: Without dead ends: 3225 [2021-06-05 23:28:41,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 895.3ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:28:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-05 23:28:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2459. [2021-06-05 23:28:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-06-05 23:28:41,436 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-06-05 23:28:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:41,436 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-06-05 23:28:41,437 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) [2021-06-05 23:28:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-06-05 23:28:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:41,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:41,441 INFO L554 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] [2021-06-05 23:28:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:41,642 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1937124355, now seen corresponding path program 5 times [2021-06-05 23:28:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:41,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973357788] [2021-06-05 23:28:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:42,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:42,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973357788] [2021-06-05 23:28:42,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973357788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732790030] [2021-06-05 23:28:42,038 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 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 [2021-06-05 23:28:42,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:28:42,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:28:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:42,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:42,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:28:42,353 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:42,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:42,365 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 35 treesize of output 27 [2021-06-05 23:28:42,368 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:42,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:42,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:28:42,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:42,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:42,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:42,395 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:28:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732790030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:42,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:42,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:28:42,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319872096] [2021-06-05 23:28:42,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:42,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:42,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:42,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:42,419 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 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) [2021-06-05 23:28:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:43,984 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-06-05 23:28:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:28:43,985 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 [2021-06-05 23:28:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:43,991 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 23:28:43,991 INFO L226 Difference]: Without dead ends: 3243 [2021-06-05 23:28:43,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1501.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:28:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-06-05 23:28:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-06-05 23:28:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-06-05 23:28:44,036 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-06-05 23:28:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:44,036 INFO L482 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-06-05 23:28:44,036 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) [2021-06-05 23:28:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-06-05 23:28:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:44,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:44,039 INFO L554 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] [2021-06-05 23:28:44,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:44,240 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1694795916, now seen corresponding path program 37 times [2021-06-05 23:28:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550309324] [2021-06-05 23:28:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550309324] [2021-06-05 23:28:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550309324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779723117] [2021-06-05 23:28:44,772 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 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 [2021-06-05 23:28:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:28:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:45,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:45,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:45,055 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 47 treesize of output 37 [2021-06-05 23:28:45,058 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:45,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:45,072 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 37 treesize of output 27 [2021-06-05 23:28:45,074 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:45,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:45,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:28:45,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:45,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:45,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:45,104 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:28:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779723117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:45,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:45,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:28:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545115809] [2021-06-05 23:28:45,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:28:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:28:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:45,126 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:28:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:49,775 INFO L93 Difference]: Finished difference Result 3579 states and 11315 transitions. [2021-06-05 23:28:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:28:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-05 23:28:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:49,781 INFO L225 Difference]: With dead ends: 3579 [2021-06-05 23:28:49,781 INFO L226 Difference]: Without dead ends: 3553 [2021-06-05 23:28:49,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 4302.6ms TimeCoverageRelationStatistics Valid=836, Invalid=5644, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:28:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-06-05 23:28:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2550. [2021-06-05 23:28:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-06-05 23:28:49,818 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-06-05 23:28:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:49,818 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-06-05 23:28:49,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:28:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-06-05 23:28:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:49,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:49,821 INFO L554 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] [2021-06-05 23:28:50,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:50,022 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:50,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1505897713, now seen corresponding path program 6 times [2021-06-05 23:28:50,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:50,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289787825] [2021-06-05 23:28:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:50,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289787825] [2021-06-05 23:28:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289787825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918125270] [2021-06-05 23:28:50,340 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 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 [2021-06-05 23:28:50,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:28:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:28:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,523 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 43 treesize of output 43 [2021-06-05 23:28:50,547 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:50,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,569 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 35 treesize of output 35 [2021-06-05 23:28:50,592 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:50,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:28:50,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:50,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:50,738 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:28:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918125270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:50,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:50,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:28:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309667658] [2021-06-05 23:28:50,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:28:50,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:28:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:28:50,806 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 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) [2021-06-05 23:28:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:53,121 INFO L93 Difference]: Finished difference Result 4146 states and 13081 transitions. [2021-06-05 23:28:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:28:53,121 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 [2021-06-05 23:28:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:53,127 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 23:28:53,127 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 23:28:53,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1907.8ms TimeCoverageRelationStatistics Valid=431, Invalid=2875, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:28:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 23:28:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 2618. [2021-06-05 23:28:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-06-05 23:28:53,168 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-06-05 23:28:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:53,168 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-06-05 23:28:53,168 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) [2021-06-05 23:28:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-06-05 23:28:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:53,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:53,171 INFO L554 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] [2021-06-05 23:28:53,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:53,373 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash 475821444, now seen corresponding path program 38 times [2021-06-05 23:28:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627136935] [2021-06-05 23:28:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:53,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627136935] [2021-06-05 23:28:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627136935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975073357] [2021-06-05 23:28:53,985 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:54,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:28:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:54,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:54,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:54,219 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 47 treesize of output 37 [2021-06-05 23:28:54,222 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:54,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:54,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:54,236 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 37 treesize of output 27 [2021-06-05 23:28:54,238 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:54,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:54,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:28:54,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:54,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:54,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:54,266 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:28:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975073357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:54,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:28:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920417039] [2021-06-05 23:28:54,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:54,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:54,289 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 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) [2021-06-05 23:28:55,476 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 23:28:56,093 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 23:28:56,339 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 23:28:56,727 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 23:28:56,852 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 23:28:57,329 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 23:28:57,877 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 23:28:58,413 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 23:28:59,221 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 23:28:59,548 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 23:29:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:00,921 INFO L93 Difference]: Finished difference Result 4273 states and 13434 transitions. [2021-06-05 23:29:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:29:00,921 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 [2021-06-05 23:29:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:00,929 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 23:29:00,929 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 23:29:00,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 6095.6ms TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:29:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 23:29:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 2648. [2021-06-05 23:29:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-06-05 23:29:00,983 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-06-05 23:29:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:00,983 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-06-05 23:29:00,983 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) [2021-06-05 23:29:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-06-05 23:29:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:00,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:00,988 INFO L554 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] [2021-06-05 23:29:01,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 23:29:01,205 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 964342132, now seen corresponding path program 39 times [2021-06-05 23:29:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:01,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090642788] [2021-06-05 23:29:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:01,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:01,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090642788] [2021-06-05 23:29:01,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090642788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:01,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001859324] [2021-06-05 23:29:01,665 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 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 [2021-06-05 23:29:01,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:29:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:29:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:01,993 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 47 treesize of output 37 [2021-06-05 23:29:01,996 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:02,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:02,009 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 37 treesize of output 27 [2021-06-05 23:29:02,012 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:02,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:02,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:02,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:02,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:02,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:02,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:29:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001859324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:02,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:02,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:29:02,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617714817] [2021-06-05 23:29:02,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:02,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:02,061 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 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) [2021-06-05 23:29:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:04,125 INFO L93 Difference]: Finished difference Result 4578 states and 14253 transitions. [2021-06-05 23:29:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:29:04,125 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 [2021-06-05 23:29:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:04,131 INFO L225 Difference]: With dead ends: 4578 [2021-06-05 23:29:04,131 INFO L226 Difference]: Without dead ends: 4548 [2021-06-05 23:29:04,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1801.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2926, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:29:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-05 23:29:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2789. [2021-06-05 23:29:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-06-05 23:29:04,174 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-06-05 23:29:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:04,174 INFO L482 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-06-05 23:29:04,174 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) [2021-06-05 23:29:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-06-05 23:29:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:04,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:04,177 INFO L554 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] [2021-06-05 23:29:04,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 23:29:04,378 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash 804456365, now seen corresponding path program 7 times [2021-06-05 23:29:04,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:04,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360501196] [2021-06-05 23:29:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:04,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360501196] [2021-06-05 23:29:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360501196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661199031] [2021-06-05 23:29:04,680 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 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 [2021-06-05 23:29:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:29:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:04,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:04,921 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 43 treesize of output 35 [2021-06-05 23:29:04,924 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:04,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:04,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:04,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:04,935 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 35 treesize of output 27 [2021-06-05 23:29:04,938 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:04,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:04,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:04,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:04,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:04,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:04,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:04,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:29:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661199031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:04,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:04,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:29:04,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501995963] [2021-06-05 23:29:04,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:29:04,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:29:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:04,986 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 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) [2021-06-05 23:29:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:06,105 INFO L93 Difference]: Finished difference Result 3530 states and 11354 transitions. [2021-06-05 23:29:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:29:06,106 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 [2021-06-05 23:29:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:06,113 INFO L225 Difference]: With dead ends: 3530 [2021-06-05 23:29:06,113 INFO L226 Difference]: Without dead ends: 3515 [2021-06-05 23:29:06,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:29:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-05 23:29:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2803. [2021-06-05 23:29:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-06-05 23:29:06,153 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-06-05 23:29:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:06,153 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-06-05 23:29:06,153 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) [2021-06-05 23:29:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-06-05 23:29:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:06,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:06,156 INFO L554 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] [2021-06-05 23:29:06,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 23:29:06,357 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -662916703, now seen corresponding path program 8 times [2021-06-05 23:29:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:06,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497401389] [2021-06-05 23:29:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:06,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:06,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497401389] [2021-06-05 23:29:06,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497401389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:06,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042652429] [2021-06-05 23:29:06,665 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 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 [2021-06-05 23:29:06,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:06,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:06,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:29:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:06,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:06,855 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 49 treesize of output 49 [2021-06-05 23:29:06,889 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:06,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:06,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:06,913 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 39 treesize of output 39 [2021-06-05 23:29:06,937 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:06,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:06,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:06,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-06-05 23:29:06,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:29:07,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:07,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:07,052 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-05 23:29:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042652429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:07,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:07,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:29:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314127900] [2021-06-05 23:29:07,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:29:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:29:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:07,119 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 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) [2021-06-05 23:29:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:09,237 INFO L93 Difference]: Finished difference Result 4025 states and 12918 transitions. [2021-06-05 23:29:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:29:09,237 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 [2021-06-05 23:29:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:09,243 INFO L225 Difference]: With dead ends: 4025 [2021-06-05 23:29:09,243 INFO L226 Difference]: Without dead ends: 4000 [2021-06-05 23:29:09,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1601.4ms TimeCoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:29:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-06-05 23:29:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2795. [2021-06-05 23:29:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-06-05 23:29:09,288 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-06-05 23:29:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:09,288 INFO L482 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-06-05 23:29:09,288 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) [2021-06-05 23:29:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-06-05 23:29:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:09,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:09,292 INFO L554 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] [2021-06-05 23:29:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 23:29:09,509 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -281439163, now seen corresponding path program 9 times [2021-06-05 23:29:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:09,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653687282] [2021-06-05 23:29:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:09,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653687282] [2021-06-05 23:29:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653687282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:09,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143034771] [2021-06-05 23:29:09,831 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 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 [2021-06-05 23:29:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:29:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:29:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:10,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:10,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:10,147 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 43 treesize of output 35 [2021-06-05 23:29:10,149 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:10,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:10,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:10,162 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 35 treesize of output 27 [2021-06-05 23:29:10,164 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:10,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:10,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:10,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:10,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:10,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:10,195 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-05 23:29:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:10,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143034771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:10,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:10,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:29:10,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650445077] [2021-06-05 23:29:10,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:29:10,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:29:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:10,215 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 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) [2021-06-05 23:29:10,944 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 23:29:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:13,116 INFO L93 Difference]: Finished difference Result 3604 states and 11567 transitions. [2021-06-05 23:29:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:29:13,117 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 [2021-06-05 23:29:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:13,124 INFO L225 Difference]: With dead ends: 3604 [2021-06-05 23:29:13,124 INFO L226 Difference]: Without dead ends: 3589 [2021-06-05 23:29:13,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1640.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:29:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-05 23:29:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2807. [2021-06-05 23:29:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-06-05 23:29:13,172 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-06-05 23:29:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:13,172 INFO L482 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-06-05 23:29:13,172 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) [2021-06-05 23:29:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-06-05 23:29:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:13,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:13,177 INFO L554 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] [2021-06-05 23:29:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:13,393 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1858531407, now seen corresponding path program 10 times [2021-06-05 23:29:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423000925] [2021-06-05 23:29:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:13,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:13,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423000925] [2021-06-05 23:29:13,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423000925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:13,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895993297] [2021-06-05 23:29:13,792 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 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 [2021-06-05 23:29:13,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:13,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:29:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:14,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:14,067 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 64 treesize of output 52 [2021-06-05 23:29:14,069 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:14,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:14,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:14,083 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 52 treesize of output 40 [2021-06-05 23:29:14,085 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:14,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:14,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 28 [2021-06-05 23:29:14,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:14,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:14,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:14,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-05 23:29:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:14,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895993297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:14,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:14,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 23:29:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967912439] [2021-06-05 23:29:14,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:29:14,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:29:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:29:14,134 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 23:29:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:15,023 INFO L93 Difference]: Finished difference Result 3655 states and 11758 transitions. [2021-06-05 23:29:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:29:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 [2021-06-05 23:29:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:15,029 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 23:29:15,029 INFO L226 Difference]: Without dead ends: 3636 [2021-06-05 23:29:15,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 924.6ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-05 23:29:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2851. [2021-06-05 23:29:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-05 23:29:15,069 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-05 23:29:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:15,069 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-05 23:29:15,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 23:29:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-05 23:29:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:15,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:15,072 INFO L554 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] [2021-06-05 23:29:15,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:15,273 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash 123759631, now seen corresponding path program 11 times [2021-06-05 23:29:15,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:15,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400729226] [2021-06-05 23:29:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:15,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:15,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400729226] [2021-06-05 23:29:15,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400729226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:15,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232864915] [2021-06-05 23:29:15,615 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 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 [2021-06-05 23:29:15,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:29:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:29:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:15,992 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 23:29:15,993 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 237 treesize of output 202 [2021-06-05 23:29:16,015 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,056 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 23:29:16,057 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 169 treesize of output 140 [2021-06-05 23:29:16,109 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:16,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 103 treesize of output 91 [2021-06-05 23:29:16,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:245, output treesize:19 [2021-06-05 23:29:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:16,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232864915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:16,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:16,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:29:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030871094] [2021-06-05 23:29:16,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:16,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:16,325 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 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) [2021-06-05 23:29:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:33,466 INFO L93 Difference]: Finished difference Result 4431 states and 14103 transitions. [2021-06-05 23:29:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:29:33,466 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 [2021-06-05 23:29:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:33,473 INFO L225 Difference]: With dead ends: 4431 [2021-06-05 23:29:33,473 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 23:29:33,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 9890.6ms TimeCoverageRelationStatistics Valid=479, Invalid=2707, Unknown=6, NotChecked=0, Total=3192 [2021-06-05 23:29:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 23:29:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2851. [2021-06-05 23:29:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-05 23:29:33,520 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-05 23:29:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:33,520 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-05 23:29:33,520 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) [2021-06-05 23:29:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-05 23:29:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:33,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:33,524 INFO L554 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] [2021-06-05 23:29:33,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 23:29:33,725 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1795725574, now seen corresponding path program 40 times [2021-06-05 23:29:33,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:33,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554044639] [2021-06-05 23:29:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:34,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:34,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554044639] [2021-06-05 23:29:34,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554044639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:34,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107314167] [2021-06-05 23:29:34,141 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 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 [2021-06-05 23:29:34,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:29:34,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,455 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 47 treesize of output 37 [2021-06-05 23:29:34,457 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:34,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:34,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,468 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 37 treesize of output 27 [2021-06-05 23:29:34,470 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:34,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:34,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:34,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:34,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:34,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:34,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:29:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:34,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107314167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:34,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:34,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:29:34,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697155832] [2021-06-05 23:29:34,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:34,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:34,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:34,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:34,517 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 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) [2021-06-05 23:29:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:37,577 INFO L93 Difference]: Finished difference Result 5434 states and 16862 transitions. [2021-06-05 23:29:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:29:37,577 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 [2021-06-05 23:29:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:37,586 INFO L225 Difference]: With dead ends: 5434 [2021-06-05 23:29:37,586 INFO L226 Difference]: Without dead ends: 5404 [2021-06-05 23:29:37,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2710.0ms TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:29:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-06-05 23:29:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 2923. [2021-06-05 23:29:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2902121834360027) internal successors, (9614), 2922 states have internal predecessors, (9614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9614 transitions. [2021-06-05 23:29:37,640 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9614 transitions. Word has length 30 [2021-06-05 23:29:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:37,640 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9614 transitions. [2021-06-05 23:29:37,640 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) [2021-06-05 23:29:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9614 transitions. [2021-06-05 23:29:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:37,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:37,643 INFO L554 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] [2021-06-05 23:29:37,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 23:29:37,844 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1512353848, now seen corresponding path program 41 times [2021-06-05 23:29:37,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:37,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308676210] [2021-06-05 23:29:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308676210] [2021-06-05 23:29:38,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308676210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104727622] [2021-06-05 23:29:38,254 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 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 [2021-06-05 23:29:38,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:29:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:29:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:38,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:38,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:38,539 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 47 treesize of output 37 [2021-06-05 23:29:38,541 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:38,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:38,555 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 37 treesize of output 27 [2021-06-05 23:29:38,557 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:38,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:38,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:38,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:38,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:38,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:38,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:29:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:38,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104727622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:38,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:38,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:29:38,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57491633] [2021-06-05 23:29:38,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:38,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:38,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:38,614 INFO L87 Difference]: Start difference. First operand 2923 states and 9614 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) [2021-06-05 23:29:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:41,410 INFO L93 Difference]: Finished difference Result 5109 states and 16139 transitions. [2021-06-05 23:29:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:29:41,410 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 [2021-06-05 23:29:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:41,417 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 23:29:41,418 INFO L226 Difference]: Without dead ends: 5079 [2021-06-05 23:29:41,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2526.8ms TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:29:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2021-06-05 23:29:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 2927. [2021-06-05 23:29:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 3.2911825017088177) internal successors, (9630), 2926 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 9630 transitions. [2021-06-05 23:29:41,466 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 9630 transitions. Word has length 30 [2021-06-05 23:29:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:41,466 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 9630 transitions. [2021-06-05 23:29:41,466 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) [2021-06-05 23:29:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 9630 transitions. [2021-06-05 23:29:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:41,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:41,470 INFO L554 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] [2021-06-05 23:29:41,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 23:29:41,670 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:41,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1009505612, now seen corresponding path program 42 times [2021-06-05 23:29:41,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:41,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581754827] [2021-06-05 23:29:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:42,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581754827] [2021-06-05 23:29:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581754827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712136702] [2021-06-05 23:29:42,042 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 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 [2021-06-05 23:29:42,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:29:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:29:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,282 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:29:42,282 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 207 treesize of output 193 [2021-06-05 23:29:42,395 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:42,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,457 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:29:42,457 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 195 treesize of output 175 [2021-06-05 23:29:42,623 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:42,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:42,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 163 [2021-06-05 23:29:43,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:43,523 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2021-06-05 23:29:43,523 INFO L628 ElimStorePlain]: treesize reduction 580, result has 71.1 percent of original size [2021-06-05 23:29:44,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:44,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:210, output treesize:34 [2021-06-05 23:29:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:44,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712136702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:44,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:44,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:29:44,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112697425] [2021-06-05 23:29:44,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:44,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:44,169 INFO L87 Difference]: Start difference. First operand 2927 states and 9630 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) [2021-06-05 23:29:44,581 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 23:29:47,145 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 23:29:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:48,718 INFO L93 Difference]: Finished difference Result 5927 states and 18549 transitions. [2021-06-05 23:29:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:29:48,718 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 [2021-06-05 23:29:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:48,727 INFO L225 Difference]: With dead ends: 5927 [2021-06-05 23:29:48,727 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 23:29:48,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 3879.9ms TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:29:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 23:29:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 2939. [2021-06-05 23:29:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 3.2950987066031314) internal successors, (9681), 2938 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 9681 transitions. [2021-06-05 23:29:48,786 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 9681 transitions. Word has length 30 [2021-06-05 23:29:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:48,787 INFO L482 AbstractCegarLoop]: Abstraction has 2939 states and 9681 transitions. [2021-06-05 23:29:48,787 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) [2021-06-05 23:29:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 9681 transitions. [2021-06-05 23:29:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:48,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:48,791 INFO L554 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] [2021-06-05 23:29:48,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 23:29:48,991 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:48,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2054481296, now seen corresponding path program 43 times [2021-06-05 23:29:48,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:48,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607850533] [2021-06-05 23:29:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:49,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607850533] [2021-06-05 23:29:49,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607850533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49934298] [2021-06-05 23:29:49,512 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 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 [2021-06-05 23:29:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:29:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,769 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 47 treesize of output 37 [2021-06-05 23:29:49,771 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:49,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,781 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 37 treesize of output 27 [2021-06-05 23:29:49,783 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:49,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:49,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:49,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:29:49,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:49,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:49,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:49,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:29:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49934298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:49,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:29:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030102561] [2021-06-05 23:29:49,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:49,831 INFO L87 Difference]: Start difference. First operand 2939 states and 9681 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:29:50,951 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 23:29:51,336 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 23:29:52,047 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 23:29:52,314 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 23:29:52,817 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 23:29:53,334 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 23:29:53,631 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 23:29:54,082 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 23:29:54,368 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 23:29:54,665 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-06-05 23:29:55,475 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 23:29:55,770 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 23:29:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:57,101 INFO L93 Difference]: Finished difference Result 4187 states and 13280 transitions. [2021-06-05 23:29:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:29:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-05 23:29:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:57,108 INFO L225 Difference]: With dead ends: 4187 [2021-06-05 23:29:57,108 INFO L226 Difference]: Without dead ends: 4161 [2021-06-05 23:29:57,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 6613.9ms TimeCoverageRelationStatistics Valid=1045, Invalid=7327, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 23:29:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-05 23:29:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 2933. [2021-06-05 23:29:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.2946793997271486) internal successors, (9660), 2932 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 9660 transitions. [2021-06-05 23:29:57,154 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 9660 transitions. Word has length 30 [2021-06-05 23:29:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:57,155 INFO L482 AbstractCegarLoop]: Abstraction has 2933 states and 9660 transitions. [2021-06-05 23:29:57,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:29:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 9660 transitions. [2021-06-05 23:29:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:57,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:57,159 INFO L554 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] [2021-06-05 23:29:57,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:57,377 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -846736199, now seen corresponding path program 12 times [2021-06-05 23:29:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585234717] [2021-06-05 23:29:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:57,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:57,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585234717] [2021-06-05 23:29:57,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585234717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:57,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061235001] [2021-06-05 23:29:57,807 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 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 [2021-06-05 23:29:57,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:29:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:57,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:29:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:58,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,088 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 43 treesize of output 51 [2021-06-05 23:29:58,154 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:58,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,184 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 35 treesize of output 43 [2021-06-05 23:29:58,231 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:29:58,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:29:58,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:29:58,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:58,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:42 [2021-06-05 23:29:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:58,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061235001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:58,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:58,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:29:58,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070172420] [2021-06-05 23:29:58,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:58,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:58,520 INFO L87 Difference]: Start difference. First operand 2933 states and 9660 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) [2021-06-05 23:30:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:00,187 INFO L93 Difference]: Finished difference Result 3927 states and 12626 transitions. [2021-06-05 23:30:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:30:00,187 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 [2021-06-05 23:30:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:00,193 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 23:30:00,193 INFO L226 Difference]: Without dead ends: 3906 [2021-06-05 23:30:00,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1610.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:30:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-06-05 23:30:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 2956. [2021-06-05 23:30:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.299830795262267) internal successors, (9751), 2955 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9751 transitions. [2021-06-05 23:30:00,236 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9751 transitions. Word has length 30 [2021-06-05 23:30:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:00,236 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9751 transitions. [2021-06-05 23:30:00,237 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) [2021-06-05 23:30:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9751 transitions. [2021-06-05 23:30:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:00,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:00,242 INFO L554 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] [2021-06-05 23:30:00,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:00,457 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash -930058093, now seen corresponding path program 13 times [2021-06-05 23:30:00,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:00,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960079104] [2021-06-05 23:30:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:00,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960079104] [2021-06-05 23:30:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960079104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308072196] [2021-06-05 23:30:00,770 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 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 [2021-06-05 23:30:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:30:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:00,977 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 43 treesize of output 43 [2021-06-05 23:30:00,995 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:01,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:01,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:01,014 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 35 treesize of output 35 [2021-06-05 23:30:01,032 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:01,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:01,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:30:01,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:30:01,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:01,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:01,136 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-06-05 23:30:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:01,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308072196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:01,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:01,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:30:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261653181] [2021-06-05 23:30:01,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:01,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:01,190 INFO L87 Difference]: Start difference. First operand 2956 states and 9751 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) [2021-06-05 23:30:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:02,104 INFO L93 Difference]: Finished difference Result 4273 states and 13760 transitions. [2021-06-05 23:30:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:30:02,104 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 [2021-06-05 23:30:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:02,111 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 23:30:02,111 INFO L226 Difference]: Without dead ends: 4248 [2021-06-05 23:30:02,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 802.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:30:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2021-06-05 23:30:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 2950. [2021-06-05 23:30:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-05 23:30:02,157 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-05 23:30:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:02,157 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-05 23:30:02,157 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) [2021-06-05 23:30:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-05 23:30:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:02,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:02,161 INFO L554 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] [2021-06-05 23:30:02,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:02,361 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash -568960327, now seen corresponding path program 14 times [2021-06-05 23:30:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:02,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178961618] [2021-06-05 23:30:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:02,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:02,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178961618] [2021-06-05 23:30:02,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178961618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:02,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092763254] [2021-06-05 23:30:02,713 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 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 [2021-06-05 23:30:02,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:30:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:02,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:02,914 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 43 treesize of output 43 [2021-06-05 23:30:02,934 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:02,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:02,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:02,953 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 35 treesize of output 35 [2021-06-05 23:30:02,987 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:03,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:03,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:03,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:30:03,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:30:03,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:03,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:03,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:92 [2021-06-05 23:30:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092763254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:03,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:03,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:30:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223914616] [2021-06-05 23:30:03,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:30:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:30:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:30:03,170 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 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) [2021-06-05 23:30:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:03,924 INFO L93 Difference]: Finished difference Result 3921 states and 12756 transitions. [2021-06-05 23:30:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:30:03,924 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 [2021-06-05 23:30:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:03,930 INFO L225 Difference]: With dead ends: 3921 [2021-06-05 23:30:03,930 INFO L226 Difference]: Without dead ends: 3896 [2021-06-05 23:30:03,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:30:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-05 23:30:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2950. [2021-06-05 23:30:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-05 23:30:03,980 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-05 23:30:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:03,980 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-05 23:30:03,980 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) [2021-06-05 23:30:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-05 23:30:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:03,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:03,985 INFO L554 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] [2021-06-05 23:30:04,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:04,194 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1088124239, now seen corresponding path program 15 times [2021-06-05 23:30:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:04,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197886978] [2021-06-05 23:30:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:04,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:04,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197886978] [2021-06-05 23:30:04,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197886978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:04,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272558483] [2021-06-05 23:30:04,542 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 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 [2021-06-05 23:30:04,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:30:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:30:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:07,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,308 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 43 treesize of output 59 [2021-06-05 23:30:07,395 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:07,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,441 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 35 treesize of output 51 [2021-06-05 23:30:07,534 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:07,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:30:07,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:30:07,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:07,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:249 [2021-06-05 23:30:07,962 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-06-05 23:30:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:08,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272558483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:08,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:08,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 23:30:08,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768115222] [2021-06-05 23:30:08,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:08,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=436, Unknown=3, NotChecked=0, Total=506 [2021-06-05 23:30:08,086 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 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) [2021-06-05 23:30:22,237 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 23:30:24,057 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 23:30:42,981 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 23:30:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:50,219 INFO L93 Difference]: Finished difference Result 3899 states and 12544 transitions. [2021-06-05 23:30:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:30:50,219 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 [2021-06-05 23:30:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:50,225 INFO L225 Difference]: With dead ends: 3899 [2021-06-05 23:30:50,226 INFO L226 Difference]: Without dead ends: 3884 [2021-06-05 23:30:50,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 18778.4ms TimeCoverageRelationStatistics Valid=393, Invalid=2459, Unknown=10, NotChecked=0, Total=2862 [2021-06-05 23:30:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2021-06-05 23:30:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2950. [2021-06-05 23:30:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.2973889454052223) internal successors, (9724), 2949 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9724 transitions. [2021-06-05 23:30:50,272 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9724 transitions. Word has length 30 [2021-06-05 23:30:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:50,272 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9724 transitions. [2021-06-05 23:30:50,272 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) [2021-06-05 23:30:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9724 transitions. [2021-06-05 23:30:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:50,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:50,277 INFO L554 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] [2021-06-05 23:30:50,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 23:30:50,493 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1739469989, now seen corresponding path program 16 times [2021-06-05 23:30:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:50,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933839031] [2021-06-05 23:30:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:50,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933839031] [2021-06-05 23:30:50,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933839031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321273506] [2021-06-05 23:30:50,847 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 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 [2021-06-05 23:30:50,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:30:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:51,093 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 43 treesize of output 35 [2021-06-05 23:30:51,095 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:51,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:51,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:51,108 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 35 treesize of output 27 [2021-06-05 23:30:51,110 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:51,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:51,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:51,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:30:51,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:51,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:51,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:51,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:30:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:51,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321273506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:51,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:51,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:30:51,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640442377] [2021-06-05 23:30:51,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:51,166 INFO L87 Difference]: Start difference. First operand 2950 states and 9724 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-06-05 23:30:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:51,998 INFO L93 Difference]: Finished difference Result 3677 states and 11946 transitions. [2021-06-05 23:30:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:30:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 [2021-06-05 23:30:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:52,004 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 23:30:52,004 INFO L226 Difference]: Without dead ends: 3662 [2021-06-05 23:30:52,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 904.7ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:30:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-06-05 23:30:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2962. [2021-06-05 23:30:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 3.2971968929415736) internal successors, (9763), 2961 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 9763 transitions. [2021-06-05 23:30:52,044 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 9763 transitions. Word has length 30 [2021-06-05 23:30:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:52,044 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 9763 transitions. [2021-06-05 23:30:52,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-06-05 23:30:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 9763 transitions. [2021-06-05 23:30:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:52,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:52,048 INFO L554 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] [2021-06-05 23:30:52,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 23:30:52,249 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2120947529, now seen corresponding path program 17 times [2021-06-05 23:30:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:52,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803837313] [2021-06-05 23:30:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:52,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:52,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803837313] [2021-06-05 23:30:52,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803837313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:52,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802959824] [2021-06-05 23:30:52,554 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 [2021-06-05 23:30:52,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:30:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:30:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:52,826 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 43 treesize of output 35 [2021-06-05 23:30:52,828 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:52,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:52,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:52,851 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 35 treesize of output 27 [2021-06-05 23:30:52,853 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:52,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:52,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:30:52,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:52,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:52,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:52,876 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:30:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:52,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802959824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:52,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:52,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:30:52,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543207239] [2021-06-05 23:30:52,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:52,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:52,893 INFO L87 Difference]: Start difference. First operand 2962 states and 9763 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) [2021-06-05 23:30:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:54,636 INFO L93 Difference]: Finished difference Result 3790 states and 12239 transitions. [2021-06-05 23:30:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:30:54,637 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 [2021-06-05 23:30:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:54,643 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 23:30:54,643 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 23:30:54,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1578.5ms TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:30:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 23:30:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2971. [2021-06-05 23:30:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 3.299326599326599) internal successors, (9799), 2970 states have internal predecessors, (9799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 9799 transitions. [2021-06-05 23:30:54,686 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 9799 transitions. Word has length 30 [2021-06-05 23:30:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:54,686 INFO L482 AbstractCegarLoop]: Abstraction has 2971 states and 9799 transitions. [2021-06-05 23:30:54,686 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) [2021-06-05 23:30:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 9799 transitions. [2021-06-05 23:30:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:54,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:54,690 INFO L554 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] [2021-06-05 23:30:54,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-06-05 23:30:54,891 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2051870483, now seen corresponding path program 18 times [2021-06-05 23:30:54,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:54,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612549075] [2021-06-05 23:30:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:55,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612549075] [2021-06-05 23:30:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612549075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820966758] [2021-06-05 23:30:55,224 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 [2021-06-05 23:30:55,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:30:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:30:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:55,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,514 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 43 treesize of output 51 [2021-06-05 23:30:55,576 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:55,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,602 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 35 treesize of output 43 [2021-06-05 23:30:55,642 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:55,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:30:55,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:30:55,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:55,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:55,809 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:125 [2021-06-05 23:30:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:55,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820966758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:55,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:55,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 23:30:55,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789282763] [2021-06-05 23:30:55,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:55,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:55,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:55,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:55,967 INFO L87 Difference]: Start difference. First operand 2971 states and 9799 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2021-06-05 23:30:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:58,834 INFO L93 Difference]: Finished difference Result 4131 states and 13257 transitions. [2021-06-05 23:30:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:30:58,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 [2021-06-05 23:30:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:58,840 INFO L225 Difference]: With dead ends: 4131 [2021-06-05 23:30:58,840 INFO L226 Difference]: Without dead ends: 4097 [2021-06-05 23:30:58,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2326.3ms TimeCoverageRelationStatistics Valid=400, Invalid=3760, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:30:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-06-05 23:30:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 2977. [2021-06-05 23:30:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-06-05 23:30:58,884 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-06-05 23:30:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:58,884 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-06-05 23:30:58,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2021-06-05 23:30:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-06-05 23:30:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:58,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:58,888 INFO L554 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] [2021-06-05 23:30:59,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:59,088 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1768820973, now seen corresponding path program 19 times [2021-06-05 23:30:59,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:59,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922182910] [2021-06-05 23:30:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:59,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922182910] [2021-06-05 23:30:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922182910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777165342] [2021-06-05 23:30:59,341 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 [2021-06-05 23:30:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:30:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:59,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,552 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 43 treesize of output 43 [2021-06-05 23:30:59,573 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:59,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:59,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,595 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 35 treesize of output 35 [2021-06-05 23:30:59,616 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:30:59,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:30:59,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:30:59,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:59,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:59,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-05 23:30:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:59,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777165342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:59,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:59,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:30:59,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275407929] [2021-06-05 23:30:59,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:59,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:59,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:59,851 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 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) [2021-06-05 23:31:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:01,041 INFO L93 Difference]: Finished difference Result 4309 states and 13904 transitions. [2021-06-05 23:31:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:31:01,041 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 [2021-06-05 23:31:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:01,048 INFO L225 Difference]: With dead ends: 4309 [2021-06-05 23:31:01,048 INFO L226 Difference]: Without dead ends: 4294 [2021-06-05 23:31:01,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:31:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-06-05 23:31:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 2977. [2021-06-05 23:31:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.301747311827957) internal successors, (9826), 2976 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9826 transitions. [2021-06-05 23:31:01,099 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9826 transitions. Word has length 30 [2021-06-05 23:31:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:01,099 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9826 transitions. [2021-06-05 23:31:01,099 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) [2021-06-05 23:31:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9826 transitions. [2021-06-05 23:31:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:01,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:01,103 INFO L554 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] [2021-06-05 23:31:01,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 23:31:01,304 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1143205165, now seen corresponding path program 20 times [2021-06-05 23:31:01,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:01,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202188454] [2021-06-05 23:31:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:01,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:01,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202188454] [2021-06-05 23:31:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202188454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:01,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833253157] [2021-06-05 23:31:01,644 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 [2021-06-05 23:31:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:31:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:31:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:01,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:01,894 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 43 treesize of output 51 [2021-06-05 23:31:01,932 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:01,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:01,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:01,961 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 35 treesize of output 43 [2021-06-05 23:31:02,009 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:02,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:02,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:02,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:02,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:02,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:02,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:02,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:488 [2021-06-05 23:31:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:02,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833253157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:02,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:02,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:31:02,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896670867] [2021-06-05 23:31:02,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:31:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:31:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:31:02,437 INFO L87 Difference]: Start difference. First operand 2977 states and 9826 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) [2021-06-05 23:31:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:05,808 INFO L93 Difference]: Finished difference Result 4831 states and 15358 transitions. [2021-06-05 23:31:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:31:05,808 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 [2021-06-05 23:31:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:05,815 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 23:31:05,815 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 23:31:05,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2886.6ms TimeCoverageRelationStatistics Valid=560, Invalid=3996, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:31:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 23:31:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 2999. [2021-06-05 23:31:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.3102068045363575) internal successors, (9924), 2998 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9924 transitions. [2021-06-05 23:31:05,863 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9924 transitions. Word has length 30 [2021-06-05 23:31:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:05,863 INFO L482 AbstractCegarLoop]: Abstraction has 2999 states and 9924 transitions. [2021-06-05 23:31:05,863 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) [2021-06-05 23:31:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9924 transitions. [2021-06-05 23:31:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:05,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:05,867 INFO L554 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] [2021-06-05 23:31:06,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 23:31:06,067 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 468442303, now seen corresponding path program 21 times [2021-06-05 23:31:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:06,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24468674] [2021-06-05 23:31:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:06,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24468674] [2021-06-05 23:31:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24468674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313494739] [2021-06-05 23:31:06,404 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 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 [2021-06-05 23:31:06,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:31:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:31:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:06,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:06,690 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 43 treesize of output 59 [2021-06-05 23:31:06,797 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:06,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:06,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:06,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 23:31:06,921 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:06,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:06,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:06,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:06,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:07,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:07,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 7 xjuncts. [2021-06-05 23:31:07,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:345 [2021-06-05 23:31:07,431 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 23:31:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313494739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 23:31:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208672434] [2021-06-05 23:31:07,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:31:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:31:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:31:07,593 INFO L87 Difference]: Start difference. First operand 2999 states and 9924 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) [2021-06-05 23:31:14,569 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 23:31:14,802 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2021-06-05 23:31:14,939 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-05 23:31:15,235 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 23:31:15,858 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-06-05 23:31:19,187 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 23:31:21,083 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 23:31:24,124 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 23:31:26,971 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-05 23:31:29,172 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 23:31:32,123 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 23:31:38,602 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 23:31:42,876 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 23:31:47,835 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 23:31:48,056 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 23:31:48,225 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-06-05 23:31:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:48,369 INFO L93 Difference]: Finished difference Result 4802 states and 15302 transitions. [2021-06-05 23:31:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:31:48,369 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 [2021-06-05 23:31:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:48,376 INFO L225 Difference]: With dead ends: 4802 [2021-06-05 23:31:48,376 INFO L226 Difference]: Without dead ends: 4772 [2021-06-05 23:31:48,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 30277.9ms TimeCoverageRelationStatistics Valid=758, Invalid=3649, Unknown=15, NotChecked=0, Total=4422 [2021-06-05 23:31:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-05 23:31:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 2992. [2021-06-05 23:31:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.307255098629221) internal successors, (9892), 2991 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9892 transitions. [2021-06-05 23:31:48,432 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9892 transitions. Word has length 30 [2021-06-05 23:31:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:48,432 INFO L482 AbstractCegarLoop]: Abstraction has 2992 states and 9892 transitions. [2021-06-05 23:31:48,432 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) [2021-06-05 23:31:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9892 transitions. [2021-06-05 23:31:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:48,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:48,435 INFO L554 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] [2021-06-05 23:31:48,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 23:31:48,636 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash -472256647, now seen corresponding path program 22 times [2021-06-05 23:31:48,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:48,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763625197] [2021-06-05 23:31:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:48,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:48,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763625197] [2021-06-05 23:31:48,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763625197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:48,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793706062] [2021-06-05 23:31:48,941 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 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 [2021-06-05 23:31:48,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:31:48,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:31:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:49,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:49,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,135 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 43 treesize of output 43 [2021-06-05 23:31:49,153 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:49,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:49,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,172 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 35 treesize of output 35 [2021-06-05 23:31:49,190 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:49,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:49,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:49,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:49,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:49,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-05 23:31:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793706062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:49,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:31:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386390294] [2021-06-05 23:31:49,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:31:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:31:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:31:49,327 INFO L87 Difference]: Start difference. First operand 2992 states and 9892 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) [2021-06-05 23:31:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:50,293 INFO L93 Difference]: Finished difference Result 4333 states and 13973 transitions. [2021-06-05 23:31:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:31:50,294 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 [2021-06-05 23:31:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:50,300 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 23:31:50,300 INFO L226 Difference]: Without dead ends: 4308 [2021-06-05 23:31:50,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 818.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:31:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-06-05 23:31:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 2983. [2021-06-05 23:31:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.3031522468142187) internal successors, (9850), 2982 states have internal predecessors, (9850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 9850 transitions. [2021-06-05 23:31:50,349 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 9850 transitions. Word has length 30 [2021-06-05 23:31:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:50,349 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 9850 transitions. [2021-06-05 23:31:50,349 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) [2021-06-05 23:31:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 9850 transitions. [2021-06-05 23:31:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:50,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:50,352 INFO L554 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] [2021-06-05 23:31:50,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 23:31:50,553 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash -111158881, now seen corresponding path program 23 times [2021-06-05 23:31:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:50,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099603404] [2021-06-05 23:31:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:50,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:50,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099603404] [2021-06-05 23:31:50,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099603404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:50,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876478571] [2021-06-05 23:31:50,934 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 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 [2021-06-05 23:31:50,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:31:50,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:50,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:31:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:51,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,198 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 47 treesize of output 45 [2021-06-05 23:31:51,221 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:51,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:51,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:51,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:51,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,245 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 37 treesize of output 35 [2021-06-05 23:31:51,267 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:51,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:51,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:51,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:51,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:51,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:26 [2021-06-05 23:31:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:51,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876478571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:51,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:51,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:31:51,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004740714] [2021-06-05 23:31:51,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:31:51,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:31:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:31:51,440 INFO L87 Difference]: Start difference. First operand 2983 states and 9850 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) [2021-06-05 23:31:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:52,982 INFO L93 Difference]: Finished difference Result 4532 states and 14620 transitions. [2021-06-05 23:31:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:31:52,982 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 [2021-06-05 23:31:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:52,989 INFO L225 Difference]: With dead ends: 4532 [2021-06-05 23:31:52,989 INFO L226 Difference]: Without dead ends: 4482 [2021-06-05 23:31:52,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1383.7ms TimeCoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:31:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-06-05 23:31:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2977. [2021-06-05 23:31:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.302755376344086) internal successors, (9829), 2976 states have internal predecessors, (9829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9829 transitions. [2021-06-05 23:31:53,037 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9829 transitions. Word has length 30 [2021-06-05 23:31:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:53,037 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 9829 transitions. [2021-06-05 23:31:53,037 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) [2021-06-05 23:31:53,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9829 transitions. [2021-06-05 23:31:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:53,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:53,041 INFO L554 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] [2021-06-05 23:31:53,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:53,241 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 947471975, now seen corresponding path program 24 times [2021-06-05 23:31:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:53,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605162334] [2021-06-05 23:31:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:53,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:53,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605162334] [2021-06-05 23:31:53,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605162334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:53,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591023495] [2021-06-05 23:31:53,612 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 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 [2021-06-05 23:31:53,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:31:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:31:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:53,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 23:31:53,805 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:53,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:53,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,823 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 35 treesize of output 35 [2021-06-05 23:31:53,852 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:53,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:53,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:53,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:53,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:53,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:31:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:54,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591023495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:54,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:54,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:31:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594358909] [2021-06-05 23:31:54,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:31:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:31:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:31:54,021 INFO L87 Difference]: Start difference. First operand 2977 states and 9829 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) [2021-06-05 23:31:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:55,422 INFO L93 Difference]: Finished difference Result 4246 states and 13807 transitions. [2021-06-05 23:31:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:31:55,422 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 [2021-06-05 23:31:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:55,428 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 23:31:55,429 INFO L226 Difference]: Without dead ends: 4221 [2021-06-05 23:31:55,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1391.0ms TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:31:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-06-05 23:31:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2974. [2021-06-05 23:31:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2973 states have (on average 3.3030608812647158) internal successors, (9820), 2973 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 9820 transitions. [2021-06-05 23:31:55,474 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 9820 transitions. Word has length 30 [2021-06-05 23:31:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:55,474 INFO L482 AbstractCegarLoop]: Abstraction has 2974 states and 9820 transitions. [2021-06-05 23:31:55,474 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) [2021-06-05 23:31:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 9820 transitions. [2021-06-05 23:31:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:55,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:55,477 INFO L554 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] [2021-06-05 23:31:55,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:55,678 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash 255536197, now seen corresponding path program 25 times [2021-06-05 23:31:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:55,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757080832] [2021-06-05 23:31:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:56,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:56,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757080832] [2021-06-05 23:31:56,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757080832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:56,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40339212] [2021-06-05 23:31:56,009 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 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 [2021-06-05 23:31:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:31:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:56,229 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 43 treesize of output 35 [2021-06-05 23:31:56,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:56,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:56,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:56,239 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 35 treesize of output 27 [2021-06-05 23:31:56,241 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:56,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:56,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:56,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:31:56,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:56,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:56,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:56,263 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:31:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40339212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:56,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:56,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:31:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804779598] [2021-06-05 23:31:56,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:31:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:31:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:31:56,280 INFO L87 Difference]: Start difference. First operand 2974 states and 9820 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) [2021-06-05 23:31:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:57,521 INFO L93 Difference]: Finished difference Result 3865 states and 12530 transitions. [2021-06-05 23:31:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:31:57,521 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 [2021-06-05 23:31:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:57,527 INFO L225 Difference]: With dead ends: 3865 [2021-06-05 23:31:57,527 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 23:31:57,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1084.4ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:31:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 23:31:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 2998. [2021-06-05 23:31:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.300633967300634) internal successors, (9892), 2997 states have internal predecessors, (9892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 9892 transitions. [2021-06-05 23:31:57,569 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 9892 transitions. Word has length 30 [2021-06-05 23:31:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:57,569 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 9892 transitions. [2021-06-05 23:31:57,569 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) [2021-06-05 23:31:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 9892 transitions. [2021-06-05 23:31:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:31:57,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:57,573 INFO L554 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] [2021-06-05 23:31:57,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:57,774 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1899460529, now seen corresponding path program 26 times [2021-06-05 23:31:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:57,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075713273] [2021-06-05 23:31:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:58,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075713273] [2021-06-05 23:31:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075713273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347123228] [2021-06-05 23:31:58,151 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 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 [2021-06-05 23:31:58,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:31:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:31:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:58,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,399 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 43 treesize of output 43 [2021-06-05 23:31:58,421 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:58,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:58,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,443 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 35 treesize of output 35 [2021-06-05 23:31:58,464 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:31:58,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:31:58,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:58,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:58,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:58,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-05 23:31:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347123228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:58,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:58,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:31:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082078913] [2021-06-05 23:31:58,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:31:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:31:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:31:58,615 INFO L87 Difference]: Start difference. First operand 2998 states and 9892 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) [2021-06-05 23:32:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:00,272 INFO L93 Difference]: Finished difference Result 4126 states and 13340 transitions. [2021-06-05 23:32:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:32:00,272 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 [2021-06-05 23:32:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:00,278 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 23:32:00,278 INFO L226 Difference]: Without dead ends: 4078 [2021-06-05 23:32:00,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1402.9ms TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:32:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-06-05 23:32:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3013. [2021-06-05 23:32:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 3.300132802124834) internal successors, (9940), 3012 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 9940 transitions. [2021-06-05 23:32:00,324 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 9940 transitions. Word has length 30 [2021-06-05 23:32:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:00,325 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 9940 transitions. [2021-06-05 23:32:00,325 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) [2021-06-05 23:32:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 9940 transitions. [2021-06-05 23:32:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:00,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:00,328 INFO L554 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] [2021-06-05 23:32:00,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:00,529 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1021832757, now seen corresponding path program 27 times [2021-06-05 23:32:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:00,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746020355] [2021-06-05 23:32:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:00,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746020355] [2021-06-05 23:32:00,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746020355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370761546] [2021-06-05 23:32:00,910 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 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 [2021-06-05 23:32:00,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:32:00,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:32:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:01,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 23:32:01,129 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:01,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,164 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 35 treesize of output 43 [2021-06-05 23:32:01,217 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:01,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:32:01,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:32:01,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:01,395 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:71 [2021-06-05 23:32:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:01,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370761546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:01,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:01,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:32:01,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290036132] [2021-06-05 23:32:01,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:32:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:32:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:32:01,600 INFO L87 Difference]: Start difference. First operand 3013 states and 9940 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) [2021-06-05 23:32:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:03,077 INFO L93 Difference]: Finished difference Result 4330 states and 13993 transitions. [2021-06-05 23:32:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:32:03,077 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 [2021-06-05 23:32:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:03,084 INFO L225 Difference]: With dead ends: 4330 [2021-06-05 23:32:03,084 INFO L226 Difference]: Without dead ends: 4280 [2021-06-05 23:32:03,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1454.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:32:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-06-05 23:32:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3038. [2021-06-05 23:32:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.296674349687191) internal successors, (10012), 3037 states have internal predecessors, (10012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10012 transitions. [2021-06-05 23:32:03,132 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10012 transitions. Word has length 30 [2021-06-05 23:32:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:03,132 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10012 transitions. [2021-06-05 23:32:03,133 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) [2021-06-05 23:32:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10012 transitions. [2021-06-05 23:32:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:03,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:03,136 INFO L554 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] [2021-06-05 23:32:03,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-05 23:32:03,339 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash 825383695, now seen corresponding path program 28 times [2021-06-05 23:32:03,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:03,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429415980] [2021-06-05 23:32:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:03,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:03,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429415980] [2021-06-05 23:32:03,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429415980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:03,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398698026] [2021-06-05 23:32:03,712 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 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 [2021-06-05 23:32:03,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:32:03,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:32:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:03,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:03,942 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 64 treesize of output 52 [2021-06-05 23:32:03,944 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:03,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:03,955 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 52 treesize of output 40 [2021-06-05 23:32:03,957 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:03,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:03,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:03,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 28 [2021-06-05 23:32:03,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:03,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:03,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:03,983 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-05 23:32:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:04,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398698026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:04,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:04,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 23:32:04,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358227604] [2021-06-05 23:32:04,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:32:04,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:04,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:32:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:32:04,006 INFO L87 Difference]: Start difference. First operand 3038 states and 10012 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 23:32:06,189 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-05 23:32:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:07,194 INFO L93 Difference]: Finished difference Result 3212 states and 10480 transitions. [2021-06-05 23:32:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:32:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 [2021-06-05 23:32:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:07,199 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 23:32:07,199 INFO L226 Difference]: Without dead ends: 3193 [2021-06-05 23:32:07,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2396.4ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:32:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-05 23:32:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3046. [2021-06-05 23:32:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.295894909688013) internal successors, (10036), 3045 states have internal predecessors, (10036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10036 transitions. [2021-06-05 23:32:07,237 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10036 transitions. Word has length 30 [2021-06-05 23:32:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:07,237 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10036 transitions. [2021-06-05 23:32:07,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 23:32:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10036 transitions. [2021-06-05 23:32:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:07,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:07,241 INFO L554 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] [2021-06-05 23:32:07,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:07,441 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1670580273, now seen corresponding path program 29 times [2021-06-05 23:32:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:07,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003136775] [2021-06-05 23:32:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:07,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:07,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003136775] [2021-06-05 23:32:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003136775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:07,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531066605] [2021-06-05 23:32:07,732 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 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 [2021-06-05 23:32:07,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:32:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:32:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:07,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:07,917 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 43 treesize of output 51 [2021-06-05 23:32:07,966 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:07,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:07,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:07,993 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 35 treesize of output 43 [2021-06-05 23:32:08,035 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:08,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:08,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:08,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:32:08,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:32:08,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:08,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:08,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:82 [2021-06-05 23:32:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:08,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531066605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:08,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:08,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:32:08,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963378657] [2021-06-05 23:32:08,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:32:08,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:32:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:32:08,355 INFO L87 Difference]: Start difference. First operand 3046 states and 10036 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) [2021-06-05 23:32:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:09,679 INFO L93 Difference]: Finished difference Result 4508 states and 14544 transitions. [2021-06-05 23:32:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:32:09,680 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 [2021-06-05 23:32:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:09,687 INFO L225 Difference]: With dead ends: 4508 [2021-06-05 23:32:09,687 INFO L226 Difference]: Without dead ends: 4483 [2021-06-05 23:32:09,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1288.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:32:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-06-05 23:32:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3095. [2021-06-05 23:32:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 3.2937944408532642) internal successors, (10191), 3094 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 10191 transitions. [2021-06-05 23:32:09,737 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 10191 transitions. Word has length 30 [2021-06-05 23:32:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:09,737 INFO L482 AbstractCegarLoop]: Abstraction has 3095 states and 10191 transitions. [2021-06-05 23:32:09,737 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) [2021-06-05 23:32:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 10191 transitions. [2021-06-05 23:32:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:09,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:09,741 INFO L554 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] [2021-06-05 23:32:09,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:09,941 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1765440369, now seen corresponding path program 30 times [2021-06-05 23:32:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:09,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433456525] [2021-06-05 23:32:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:10,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:10,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433456525] [2021-06-05 23:32:10,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433456525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:10,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566295122] [2021-06-05 23:32:10,346 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 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 [2021-06-05 23:32:10,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:32:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:32:10,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:10,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,547 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 43 treesize of output 43 [2021-06-05 23:32:10,569 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:10,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:10,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,591 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 35 treesize of output 35 [2021-06-05 23:32:10,612 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:10,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:32:10,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:32:10,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:10,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:10,702 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:32:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:10,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566295122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:10,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:10,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:32:10,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531126731] [2021-06-05 23:32:10,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:32:10,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:32:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:32:10,770 INFO L87 Difference]: Start difference. First operand 3095 states and 10191 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) [2021-06-05 23:32:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:12,272 INFO L93 Difference]: Finished difference Result 4219 states and 13699 transitions. [2021-06-05 23:32:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:32:12,272 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 [2021-06-05 23:32:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:12,278 INFO L225 Difference]: With dead ends: 4219 [2021-06-05 23:32:12,279 INFO L226 Difference]: Without dead ends: 4194 [2021-06-05 23:32:12,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1379.4ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:32:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-06-05 23:32:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3103. [2021-06-05 23:32:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-06-05 23:32:12,336 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-06-05 23:32:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:12,336 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-06-05 23:32:12,336 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) [2021-06-05 23:32:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-06-05 23:32:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:12,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:12,341 INFO L554 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] [2021-06-05 23:32:12,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:12,541 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 879258491, now seen corresponding path program 31 times [2021-06-05 23:32:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:12,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690808550] [2021-06-05 23:32:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:12,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:12,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690808550] [2021-06-05 23:32:12,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690808550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:12,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185109699] [2021-06-05 23:32:12,851 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 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 [2021-06-05 23:32:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:32:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:13,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,042 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 47 treesize of output 45 [2021-06-05 23:32:13,060 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:13,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:13,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:13,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,081 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 37 treesize of output 35 [2021-06-05 23:32:13,111 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:13,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:32:13,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:32:13,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:13,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:13,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-05 23:32:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:13,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185109699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:13,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:13,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:32:13,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994798311] [2021-06-05 23:32:13,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:32:13,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:32:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:32:13,301 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:32:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:14,403 INFO L93 Difference]: Finished difference Result 4326 states and 14033 transitions. [2021-06-05 23:32:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:32:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 [2021-06-05 23:32:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:14,410 INFO L225 Difference]: With dead ends: 4326 [2021-06-05 23:32:14,410 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 23:32:14,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:32:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 23:32:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3103. [2021-06-05 23:32:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.293036750483559) internal successors, (10215), 3102 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 10215 transitions. [2021-06-05 23:32:14,462 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 10215 transitions. Word has length 30 [2021-06-05 23:32:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:14,462 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 10215 transitions. [2021-06-05 23:32:14,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:32:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 10215 transitions. [2021-06-05 23:32:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:14,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:14,466 INFO L554 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] [2021-06-05 23:32:14,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 23:32:14,667 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2131402188, now seen corresponding path program 44 times [2021-06-05 23:32:14,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:14,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746656046] [2021-06-05 23:32:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:15,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:15,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746656046] [2021-06-05 23:32:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746656046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:15,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319698213] [2021-06-05 23:32:15,063 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 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 [2021-06-05 23:32:15,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:32:15,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:32:15,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:15,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:15,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:15,272 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 47 treesize of output 37 [2021-06-05 23:32:15,274 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:15,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:15,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:15,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:15,284 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 37 treesize of output 27 [2021-06-05 23:32:15,286 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:15,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:15,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:32:15,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:15,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:15,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:15,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:32:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:15,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319698213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:15,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:15,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:32:15,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080833856] [2021-06-05 23:32:15,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:32:15,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:15,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:32:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:32:15,332 INFO L87 Difference]: Start difference. First operand 3103 states and 10215 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) [2021-06-05 23:32:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:17,046 INFO L93 Difference]: Finished difference Result 4106 states and 13120 transitions. [2021-06-05 23:32:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:32:17,047 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 [2021-06-05 23:32:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:17,052 INFO L225 Difference]: With dead ends: 4106 [2021-06-05 23:32:17,052 INFO L226 Difference]: Without dead ends: 4080 [2021-06-05 23:32:17,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1684.0ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:32:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-06-05 23:32:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3097. [2021-06-05 23:32:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 3.294573643410853) internal successors, (10200), 3096 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 10200 transitions. [2021-06-05 23:32:17,095 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 10200 transitions. Word has length 30 [2021-06-05 23:32:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:17,095 INFO L482 AbstractCegarLoop]: Abstraction has 3097 states and 10200 transitions. [2021-06-05 23:32:17,095 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) [2021-06-05 23:32:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 10200 transitions. [2021-06-05 23:32:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:17,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:17,099 INFO L554 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] [2021-06-05 23:32:17,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:17,301 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1986525082, now seen corresponding path program 45 times [2021-06-05 23:32:17,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:17,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549931817] [2021-06-05 23:32:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:17,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:17,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549931817] [2021-06-05 23:32:17,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549931817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:17,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744125714] [2021-06-05 23:32:17,657 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 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 [2021-06-05 23:32:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:32:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:17,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:32:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:17,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:17,934 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 47 treesize of output 63 [2021-06-05 23:32:18,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:18,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:18,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,077 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 37 treesize of output 53 [2021-06-05 23:32:18,184 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:18,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 23:32:18,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:32:18,925 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2021-06-05 23:32:18,925 INFO L628 ElimStorePlain]: treesize reduction 900, result has 54.5 percent of original size [2021-06-05 23:32:19,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:19,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:54 [2021-06-05 23:32:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:19,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744125714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:19,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:19,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:32:19,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047658438] [2021-06-05 23:32:19,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:32:19,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:32:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:32:19,302 INFO L87 Difference]: Start difference. First operand 3097 states and 10200 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) [2021-06-05 23:32:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:22,166 INFO L93 Difference]: Finished difference Result 4278 states and 13633 transitions. [2021-06-05 23:32:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:32:22,166 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 [2021-06-05 23:32:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:22,172 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 23:32:22,172 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 23:32:22,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2302.2ms TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:32:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 23:32:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3137. [2021-06-05 23:32:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 3.2901785714285716) internal successors, (10318), 3136 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 10318 transitions. [2021-06-05 23:32:22,215 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 10318 transitions. Word has length 30 [2021-06-05 23:32:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:22,215 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 10318 transitions. [2021-06-05 23:32:22,216 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) [2021-06-05 23:32:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 10318 transitions. [2021-06-05 23:32:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:22,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:22,219 INFO L554 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] [2021-06-05 23:32:22,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 23:32:22,420 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2024287664, now seen corresponding path program 46 times [2021-06-05 23:32:22,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:22,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781557639] [2021-06-05 23:32:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:22,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:22,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781557639] [2021-06-05 23:32:22,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781557639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:22,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938702234] [2021-06-05 23:32:22,822 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 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 [2021-06-05 23:32:22,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:32:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:32:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:26,724 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:32:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:26,742 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 47 treesize of output 37 [2021-06-05 23:32:26,743 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:26,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:26,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:26,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:26,755 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 37 treesize of output 27 [2021-06-05 23:32:26,758 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:26,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:26,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:26,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:32:26,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:26,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:26,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:26,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:32:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:26,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938702234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:26,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:26,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 23:32:26,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360791514] [2021-06-05 23:32:26,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:32:26,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:26,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:32:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=381, Unknown=4, NotChecked=0, Total=462 [2021-06-05 23:32:26,816 INFO L87 Difference]: Start difference. First operand 3137 states and 10318 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) [2021-06-05 23:32:53,908 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 23:32:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:58,483 INFO L93 Difference]: Finished difference Result 4277 states and 13788 transitions. [2021-06-05 23:32:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:32:58,484 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 [2021-06-05 23:32:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:58,490 INFO L225 Difference]: With dead ends: 4277 [2021-06-05 23:32:58,490 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 23:32:58,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 18663.7ms TimeCoverageRelationStatistics Valid=517, Invalid=3006, Unknown=17, NotChecked=0, Total=3540 [2021-06-05 23:32:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 23:32:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3157. [2021-06-05 23:32:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-06-05 23:32:58,538 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-06-05 23:32:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:58,538 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-06-05 23:32:58,538 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) [2021-06-05 23:32:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-06-05 23:32:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:32:58,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:58,542 INFO L554 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] [2021-06-05 23:32:58,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-06-05 23:32:58,743 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -695963646, now seen corresponding path program 47 times [2021-06-05 23:32:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:58,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338996241] [2021-06-05 23:32:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:59,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338996241] [2021-06-05 23:32:59,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338996241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780705350] [2021-06-05 23:32:59,127 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 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 [2021-06-05 23:32:59,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:32:59,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:32:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:59,396 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 47 treesize of output 37 [2021-06-05 23:32:59,398 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:59,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:32:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:32:59,407 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:32:59,409 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:32:59,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:59,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:59,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:32:59,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:59,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:59,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:32:59,431 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:32:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780705350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:59,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:59,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:32:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169368680] [2021-06-05 23:32:59,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:32:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:32:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:32:59,448 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:33:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:01,912 INFO L93 Difference]: Finished difference Result 4084 states and 13096 transitions. [2021-06-05 23:33:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:33:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-05 23:33:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:01,919 INFO L225 Difference]: With dead ends: 4084 [2021-06-05 23:33:01,919 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 23:33:01,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2155.0ms TimeCoverageRelationStatistics Valid=546, Invalid=3360, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:33:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 23:33:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3157. [2021-06-05 23:33:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.285171102661597) internal successors, (10368), 3156 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 10368 transitions. [2021-06-05 23:33:01,962 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 10368 transitions. Word has length 30 [2021-06-05 23:33:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:01,962 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 10368 transitions. [2021-06-05 23:33:01,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-05 23:33:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 10368 transitions. [2021-06-05 23:33:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:01,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:01,966 INFO L554 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] [2021-06-05 23:33:02,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:02,166 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1511030885, now seen corresponding path program 32 times [2021-06-05 23:33:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:02,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185609073] [2021-06-05 23:33:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:02,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185609073] [2021-06-05 23:33:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185609073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026018238] [2021-06-05 23:33:02,487 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 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 [2021-06-05 23:33:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:33:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:33:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:02,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:02,743 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 43 treesize of output 51 [2021-06-05 23:33:02,798 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:02,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:02,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:02,827 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 35 treesize of output 43 [2021-06-05 23:33:02,890 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:02,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:02,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:02,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:33:02,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:03,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:03,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:03,097 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:153 [2021-06-05 23:33:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026018238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:03,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:03,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:33:03,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479851399] [2021-06-05 23:33:03,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:33:03,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:33:03,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:33:03,167 INFO L87 Difference]: Start difference. First operand 3157 states and 10368 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) [2021-06-05 23:33:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:06,109 INFO L93 Difference]: Finished difference Result 4748 states and 14976 transitions. [2021-06-05 23:33:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:33:06,110 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 [2021-06-05 23:33:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:06,119 INFO L225 Difference]: With dead ends: 4748 [2021-06-05 23:33:06,119 INFO L226 Difference]: Without dead ends: 4718 [2021-06-05 23:33:06,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2396.7ms TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:33:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2021-06-05 23:33:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 3186. [2021-06-05 23:33:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.2910518053375197) internal successors, (10482), 3185 states have internal predecessors, (10482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10482 transitions. [2021-06-05 23:33:06,176 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10482 transitions. Word has length 30 [2021-06-05 23:33:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:06,176 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10482 transitions. [2021-06-05 23:33:06,177 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) [2021-06-05 23:33:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10482 transitions. [2021-06-05 23:33:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:06,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:06,181 INFO L554 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] [2021-06-05 23:33:06,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 23:33:06,381 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:06,382 INFO L82 PathProgramCache]: Analyzing trace with hash 871210921, now seen corresponding path program 33 times [2021-06-05 23:33:06,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:06,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534591079] [2021-06-05 23:33:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:06,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534591079] [2021-06-05 23:33:06,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534591079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:06,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893944985] [2021-06-05 23:33:06,696 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 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 [2021-06-05 23:33:06,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:33:06,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:33:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:07,207 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 23:33:07,428 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 23:33:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:07,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,448 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 43 treesize of output 51 [2021-06-05 23:33:07,489 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:07,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:07,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,528 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 35 treesize of output 43 [2021-06-05 23:33:07,580 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:07,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:33:07,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:07,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:07,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 6 xjuncts. [2021-06-05 23:33:07,829 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:251 [2021-06-05 23:33:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:07,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893944985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:07,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:07,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:33:07,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138968881] [2021-06-05 23:33:07,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:33:07,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:33:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:33:07,942 INFO L87 Difference]: Start difference. First operand 3186 states and 10482 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:08,299 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 23:33:11,019 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 23:33:12,498 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 23:33:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:17,870 INFO L93 Difference]: Finished difference Result 5204 states and 16501 transitions. [2021-06-05 23:33:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:33:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 [2021-06-05 23:33:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:17,878 INFO L225 Difference]: With dead ends: 5204 [2021-06-05 23:33:17,878 INFO L226 Difference]: Without dead ends: 5185 [2021-06-05 23:33:17,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3681.8ms TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:33:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-06-05 23:33:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 3197. [2021-06-05 23:33:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.292866082603254) internal successors, (10524), 3196 states have internal predecessors, (10524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10524 transitions. [2021-06-05 23:33:17,928 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10524 transitions. Word has length 30 [2021-06-05 23:33:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:17,928 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10524 transitions. [2021-06-05 23:33:17,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10524 transitions. [2021-06-05 23:33:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:17,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:17,932 INFO L554 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] [2021-06-05 23:33:18,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-05 23:33:18,132 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1742930817, now seen corresponding path program 34 times [2021-06-05 23:33:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:18,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137996111] [2021-06-05 23:33:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:18,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:18,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137996111] [2021-06-05 23:33:18,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137996111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:18,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117142856] [2021-06-05 23:33:18,530 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 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 [2021-06-05 23:33:18,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:33:18,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:33:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:18,840 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 43 treesize of output 35 [2021-06-05 23:33:18,842 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:18,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:18,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:18,851 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 35 treesize of output 27 [2021-06-05 23:33:18,853 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:18,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:33:18,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:18,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:18,876 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:33:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:18,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117142856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:18,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:18,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:33:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720554701] [2021-06-05 23:33:18,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:33:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:33:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:33:18,893 INFO L87 Difference]: Start difference. First operand 3197 states and 10524 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) [2021-06-05 23:33:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:21,346 INFO L93 Difference]: Finished difference Result 4615 states and 14674 transitions. [2021-06-05 23:33:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:33:21,346 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 [2021-06-05 23:33:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:21,353 INFO L225 Difference]: With dead ends: 4615 [2021-06-05 23:33:21,353 INFO L226 Difference]: Without dead ends: 4600 [2021-06-05 23:33:21,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2386.8ms TimeCoverageRelationStatistics Valid=620, Invalid=2686, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:33:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-06-05 23:33:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3186. [2021-06-05 23:33:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.290423861852433) internal successors, (10480), 3185 states have internal predecessors, (10480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 10480 transitions. [2021-06-05 23:33:21,402 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 10480 transitions. Word has length 30 [2021-06-05 23:33:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:21,402 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 10480 transitions. [2021-06-05 23:33:21,402 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) [2021-06-05 23:33:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 10480 transitions. [2021-06-05 23:33:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:21,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:21,407 INFO L554 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] [2021-06-05 23:33:21,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1226,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:21,609 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 701763704, now seen corresponding path program 48 times [2021-06-05 23:33:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:21,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647000941] [2021-06-05 23:33:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:22,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:22,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647000941] [2021-06-05 23:33:22,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647000941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:22,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528054676] [2021-06-05 23:33:22,053 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 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 [2021-06-05 23:33:22,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:33:22,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:33:22,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:22,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:22,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:22,271 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 47 treesize of output 37 [2021-06-05 23:33:22,273 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:22,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:22,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:22,283 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 37 treesize of output 27 [2021-06-05 23:33:22,285 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:22,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:22,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:33:22,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:22,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:22,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:22,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:33:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528054676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:22,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:33:22,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092671133] [2021-06-05 23:33:22,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:33:22,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:33:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:33:22,342 INFO L87 Difference]: Start difference. First operand 3186 states and 10480 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) [2021-06-05 23:33:24,660 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 23:33:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:26,951 INFO L93 Difference]: Finished difference Result 4817 states and 15194 transitions. [2021-06-05 23:33:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:33:26,952 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 [2021-06-05 23:33:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:26,959 INFO L225 Difference]: With dead ends: 4817 [2021-06-05 23:33:26,959 INFO L226 Difference]: Without dead ends: 4788 [2021-06-05 23:33:26,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 4059.8ms TimeCoverageRelationStatistics Valid=1355, Invalid=7765, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 23:33:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-06-05 23:33:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3197. [2021-06-05 23:33:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 3.2947434292866085) internal successors, (10530), 3196 states have internal predecessors, (10530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10530 transitions. [2021-06-05 23:33:27,014 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10530 transitions. Word has length 30 [2021-06-05 23:33:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:27,014 INFO L482 AbstractCegarLoop]: Abstraction has 3197 states and 10530 transitions. [2021-06-05 23:33:27,014 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) [2021-06-05 23:33:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10530 transitions. [2021-06-05 23:33:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:27,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:27,019 INFO L554 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] [2021-06-05 23:33:27,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 23:33:27,219 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash -597068292, now seen corresponding path program 49 times [2021-06-05 23:33:27,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:27,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82295025] [2021-06-05 23:33:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:27,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:27,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82295025] [2021-06-05 23:33:27,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82295025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:27,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327532733] [2021-06-05 23:33:27,566 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 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 [2021-06-05 23:33:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:33:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:27,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:27,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:27,799 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 47 treesize of output 37 [2021-06-05 23:33:27,800 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:27,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:27,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:27,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:27,811 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 37 treesize of output 27 [2021-06-05 23:33:27,812 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:27,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:27,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:33:27,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:33:27,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:27,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:27,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:33:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:27,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327532733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:27,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:27,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:33:27,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987195065] [2021-06-05 23:33:27,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:33:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:33:27,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:33:27,858 INFO L87 Difference]: Start difference. First operand 3197 states and 10530 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) [2021-06-05 23:33:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:30,891 INFO L93 Difference]: Finished difference Result 5801 states and 18343 transitions. [2021-06-05 23:33:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:33:30,891 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 [2021-06-05 23:33:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:30,899 INFO L225 Difference]: With dead ends: 5801 [2021-06-05 23:33:30,899 INFO L226 Difference]: Without dead ends: 5780 [2021-06-05 23:33:30,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2301.4ms TimeCoverageRelationStatistics Valid=672, Invalid=4158, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:33:30,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-06-05 23:33:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 3340. [2021-06-05 23:33:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 3.2946990116801436) internal successors, (11001), 3339 states have internal predecessors, (11001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 11001 transitions. [2021-06-05 23:33:30,956 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 11001 transitions. Word has length 30 [2021-06-05 23:33:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:30,956 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 11001 transitions. [2021-06-05 23:33:30,957 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) [2021-06-05 23:33:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 11001 transitions. [2021-06-05 23:33:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:30,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:30,961 INFO L554 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] [2021-06-05 23:33:31,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:33:31,165 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1176039544, now seen corresponding path program 50 times [2021-06-05 23:33:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420822173] [2021-06-05 23:33:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:31,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:31,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420822173] [2021-06-05 23:33:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420822173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:31,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608355352] [2021-06-05 23:33:31,497 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 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 [2021-06-05 23:33:31,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:33:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:33:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:31,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:31,766 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 47 treesize of output 63 [2021-06-05 23:33:31,881 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:31,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:31,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:31,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:31,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 23:33:32,027 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:32,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:32,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:32,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 23:33:32,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:32,877 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-06-05 23:33:32,878 INFO L628 ElimStorePlain]: treesize reduction 44, result has 97.8 percent of original size [2021-06-05 23:33:33,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:33,340 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:34 [2021-06-05 23:33:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608355352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:33,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:33,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 23:33:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884606819] [2021-06-05 23:33:33,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:33:33,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:33:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:33:33,424 INFO L87 Difference]: Start difference. First operand 3340 states and 11001 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) [2021-06-05 23:33:36,008 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 23:33:36,960 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 23:33:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:39,145 INFO L93 Difference]: Finished difference Result 7449 states and 23005 transitions. [2021-06-05 23:33:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:33:39,146 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 [2021-06-05 23:33:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:39,158 INFO L225 Difference]: With dead ends: 7449 [2021-06-05 23:33:39,158 INFO L226 Difference]: Without dead ends: 7336 [2021-06-05 23:33:39,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 4508.1ms TimeCoverageRelationStatistics Valid=1874, Invalid=9468, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 23:33:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2021-06-05 23:33:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 3586. [2021-06-05 23:33:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 3.300976290097629) internal successors, (11834), 3585 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 11834 transitions. [2021-06-05 23:33:39,232 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 11834 transitions. Word has length 30 [2021-06-05 23:33:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:39,232 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 11834 transitions. [2021-06-05 23:33:39,232 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) [2021-06-05 23:33:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 11834 transitions. [2021-06-05 23:33:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:39,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:39,236 INFO L554 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] [2021-06-05 23:33:39,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-06-05 23:33:39,437 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2047112795, now seen corresponding path program 35 times [2021-06-05 23:33:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:39,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184368908] [2021-06-05 23:33:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:39,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:39,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184368908] [2021-06-05 23:33:39,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184368908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:39,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621889157] [2021-06-05 23:33:39,765 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 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 [2021-06-05 23:33:39,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:33:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:33:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:39,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:39,936 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 47 treesize of output 45 [2021-06-05 23:33:39,959 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:39,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:33:39,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:39,985 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 37 treesize of output 35 [2021-06-05 23:33:40,005 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:40,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:40,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:40,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:33:40,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:40,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:40,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:40,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:45 [2021-06-05 23:33:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621889157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:40,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:40,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:33:40,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008345556] [2021-06-05 23:33:40,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:33:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:33:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:33:40,201 INFO L87 Difference]: Start difference. First operand 3586 states and 11834 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:42,639 INFO L93 Difference]: Finished difference Result 4765 states and 15502 transitions. [2021-06-05 23:33:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:33:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 [2021-06-05 23:33:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:42,646 INFO L225 Difference]: With dead ends: 4765 [2021-06-05 23:33:42,646 INFO L226 Difference]: Without dead ends: 4740 [2021-06-05 23:33:42,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2168.1ms TimeCoverageRelationStatistics Valid=526, Invalid=2554, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:33:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2021-06-05 23:33:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 3580. [2021-06-05 23:33:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-06-05 23:33:42,697 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-06-05 23:33:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:42,697 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-06-05 23:33:42,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-06-05 23:33:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:42,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:42,701 INFO L554 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] [2021-06-05 23:33:42,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-05 23:33:42,908 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:42,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1125030693, now seen corresponding path program 36 times [2021-06-05 23:33:42,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:42,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233471377] [2021-06-05 23:33:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:43,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:43,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233471377] [2021-06-05 23:33:43,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233471377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:43,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319644309] [2021-06-05 23:33:43,198 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 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 [2021-06-05 23:33:43,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:33:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:33:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:43,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,365 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 49 treesize of output 49 [2021-06-05 23:33:43,396 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:43,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:43,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,419 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 39 treesize of output 39 [2021-06-05 23:33:43,440 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:43,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 49 [2021-06-05 23:33:43,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:43,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:43,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:43,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-05 23:33:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:43,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319644309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:43,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:43,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:33:43,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130762474] [2021-06-05 23:33:43,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:33:43,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:33:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:33:43,610 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 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) [2021-06-05 23:33:43,958 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 23:33:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:46,840 INFO L93 Difference]: Finished difference Result 5143 states and 16713 transitions. [2021-06-05 23:33:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:33:46,841 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 [2021-06-05 23:33:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:46,848 INFO L225 Difference]: With dead ends: 5143 [2021-06-05 23:33:46,849 INFO L226 Difference]: Without dead ends: 5118 [2021-06-05 23:33:46,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2626.2ms TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:33:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-06-05 23:33:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 3590. [2021-06-05 23:33:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 3.3011981053218165) internal successors, (11848), 3589 states have internal predecessors, (11848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 11848 transitions. [2021-06-05 23:33:46,907 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 11848 transitions. Word has length 30 [2021-06-05 23:33:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:46,907 INFO L482 AbstractCegarLoop]: Abstraction has 3590 states and 11848 transitions. [2021-06-05 23:33:46,907 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) [2021-06-05 23:33:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 11848 transitions. [2021-06-05 23:33:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:46,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:46,911 INFO L554 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] [2021-06-05 23:33:47,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-05 23:33:47,113 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1964181417, now seen corresponding path program 37 times [2021-06-05 23:33:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:47,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382633677] [2021-06-05 23:33:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:47,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382633677] [2021-06-05 23:33:47,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382633677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148386090] [2021-06-05 23:33:47,390 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 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 [2021-06-05 23:33:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:33:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:47,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,571 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 43 treesize of output 43 [2021-06-05 23:33:47,588 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:47,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:47,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,608 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 35 treesize of output 35 [2021-06-05 23:33:47,625 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:47,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:33:47,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:47,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:47,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:47,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:28 [2021-06-05 23:33:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:47,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148386090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:47,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:47,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 23:33:47,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604302682] [2021-06-05 23:33:47,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:33:47,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:33:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:33:47,787 INFO L87 Difference]: Start difference. First operand 3590 states and 11848 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:33:49,947 INFO L93 Difference]: Finished difference Result 4897 states and 15932 transitions. [2021-06-05 23:33:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:33:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 [2021-06-05 23:33:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:33:49,955 INFO L225 Difference]: With dead ends: 4897 [2021-06-05 23:33:49,955 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 23:33:49,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1812.0ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:33:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 23:33:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3580. [2021-06-05 23:33:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.3017602682313494) internal successors, (11817), 3579 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:33:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11817 transitions. [2021-06-05 23:33:50,011 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11817 transitions. Word has length 30 [2021-06-05 23:33:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:33:50,011 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 11817 transitions. [2021-06-05 23:33:50,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-05 23:33:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11817 transitions. [2021-06-05 23:33:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:33:50,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:33:50,015 INFO L554 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] [2021-06-05 23:33:50,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-05 23:33:50,216 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:33:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:33:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash -602707730, now seen corresponding path program 51 times [2021-06-05 23:33:50,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:33:50,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708092494] [2021-06-05 23:33:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:33:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:33:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:50,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:33:50,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708092494] [2021-06-05 23:33:50,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708092494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:50,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148546866] [2021-06-05 23:33:50,661 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 [2021-06-05 23:33:50,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:33:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:33:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:33:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:33:55,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:55,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:55,078 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 43 treesize of output 67 [2021-06-05 23:33:55,358 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:55,416 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-05 23:33:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:33:55,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:55,437 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 35 treesize of output 59 [2021-06-05 23:33:55,647 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:33:55,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:55,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:33:55,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 23:33:55,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:33:56,416 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-05 23:33:56,416 INFO L628 ElimStorePlain]: treesize reduction 1080, result has 44.8 percent of original size [2021-06-05 23:33:56,925 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 166 [2021-06-05 23:33:57,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:33:57,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:620 [2021-06-05 23:33:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:33:57,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148546866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:57,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:57,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:33:57,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927505672] [2021-06-05 23:33:57,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:33:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:33:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=711, Unknown=3, NotChecked=0, Total=812 [2021-06-05 23:33:57,604 INFO L87 Difference]: Start difference. First operand 3580 states and 11817 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-06-05 23:36:19,328 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 23:36:19,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:19,530 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:155) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:910) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:807) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:364) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:152) ... 34 more [2021-06-05 23:36:19,532 INFO L168 Benchmark]: Toolchain (without parser) took 496783.21 ms. Allocated memory was 385.9 MB in the beginning and 966.8 MB in the end (delta: 580.9 MB). Free memory was 367.2 MB in the beginning and 843.1 MB in the end (delta: -475.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:19,532 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 385.9 MB. Free memory is still 368.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:36:19,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.06 ms. Allocated memory is still 385.9 MB. Free memory was 367.1 MB in the beginning and 365.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:36:19,533 INFO L168 Benchmark]: Boogie Preprocessor took 17.98 ms. Allocated memory is still 385.9 MB. Free memory was 365.7 MB in the beginning and 364.7 MB in the end (delta: 990.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:19,533 INFO L168 Benchmark]: RCFGBuilder took 259.79 ms. Allocated memory is still 385.9 MB. Free memory was 364.5 MB in the beginning and 352.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:19,533 INFO L168 Benchmark]: TraceAbstraction took 496475.61 ms. Allocated memory was 385.9 MB in the beginning and 966.8 MB in the end (delta: 580.9 MB). Free memory was 352.3 MB in the beginning and 843.1 MB in the end (delta: -490.8 MB). Peak memory consumption was 92.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:19,533 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 0.13 ms. Allocated memory is still 385.9 MB. Free memory is still 368.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.06 ms. Allocated memory is still 385.9 MB. Free memory was 367.1 MB in the beginning and 365.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.98 ms. Allocated memory is still 385.9 MB. Free memory was 365.7 MB in the beginning and 364.7 MB in the end (delta: 990.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 259.79 ms. Allocated memory is still 385.9 MB. Free memory was 364.5 MB in the beginning and 352.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 496475.61 ms. Allocated memory was 385.9 MB in the beginning and 966.8 MB in the end (delta: 580.9 MB). Free memory was 352.3 MB in the beginning and 843.1 MB in the end (delta: -490.8 MB). Peak memory consumption was 92.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:155) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...