/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:10:29,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:10:29,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:10:29,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 19:10:29,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 19:10:29,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 19:10:29,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 19:10:29,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 19:10:29,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 19:10:29,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 19:10:29,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 19:10:29,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-12 19:10:30,001 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 [2021-08-12 19:10:30,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:10:30,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:10:30,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:10:30,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:10:30,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:10:30,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:10:30,019 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:10:30,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:10:30,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:10:30,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:10:30,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:10:30,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:10:30,022 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:10:30,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:10:30,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:10:30,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:10:30,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:10:30,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:10:30,286 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:10:30,288 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:10:30,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl [2021-08-12 19:10:30,289 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl' [2021-08-12 19:10:30,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:10:30,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:10:30,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:10:30,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:10:30,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:10:30,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:10:30,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:10:30,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:10:30,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:10:30,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/1) ... [2021-08-12 19:10:30,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:10:30,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:10:30,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:10:30,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:10:30,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (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 [2021-08-12 19:10:30,474 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:10:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:10:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:10:30,476 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:10:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:10:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:10:30,476 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:10:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:10:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:10:30,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:10:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:10:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:10:30,479 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:10:30,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:10:30,896 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-12 19:10:30,897 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:10:30 BoogieIcfgContainer [2021-08-12 19:10:30,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:10:30,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:10:30,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:10:30,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:10:30,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:10:30" (1/2) ... [2021-08-12 19:10:30,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150868ea and model type nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:10:30, skipping insertion in model container [2021-08-12 19:10:30,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:10:30" (2/2) ... [2021-08-12 19:10:30,902 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-subst.wvr.bpl [2021-08-12 19:10:30,905 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:10:30,905 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:10:30,906 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:10:30,950 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 19:10:30,968 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 19:10:30,985 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:10:30,985 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:10:30,985 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:10:30,985 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:10:30,985 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:10:30,985 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:10:30,985 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:10:30,986 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:10:30,991 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-08-12 19:10:31,014 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:31,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:31,022 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:31,023 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-08-12 19:10:31,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:31,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318831220] [2021-08-12 19:10:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:31,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:31,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318831220] [2021-08-12 19:10:31,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318831220] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:31,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:31,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:31,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490619107] [2021-08-12 19:10:31,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:31,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:31,385 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:31,722 INFO L93 Difference]: Finished difference Result 269 states and 828 transitions. [2021-08-12 19:10:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:31,742 INFO L225 Difference]: With dead ends: 269 [2021-08-12 19:10:31,742 INFO L226 Difference]: Without dead ends: 250 [2021-08-12 19:10:31,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-12 19:10:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-08-12 19:10:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-08-12 19:10:31,809 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-08-12 19:10:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:31,810 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-08-12 19:10:31,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-08-12 19:10:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:31,811 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:31,811 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:31,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:10:31,812 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-08-12 19:10:31,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:31,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009693002] [2021-08-12 19:10:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:31,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:31,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009693002] [2021-08-12 19:10:31,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009693002] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:31,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:31,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:31,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883290907] [2021-08-12 19:10:31,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:31,969 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:32,152 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-08-12 19:10:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:32,155 INFO L225 Difference]: With dead ends: 280 [2021-08-12 19:10:32,155 INFO L226 Difference]: Without dead ends: 263 [2021-08-12 19:10:32,156 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-12 19:10:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 132. [2021-08-12 19:10:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-08-12 19:10:32,165 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-08-12 19:10:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:32,165 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-08-12 19:10:32,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-08-12 19:10:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:32,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:32,166 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:32,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:10:32,166 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-08-12 19:10:32,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:32,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233180331] [2021-08-12 19:10:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:32,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233180331] [2021-08-12 19:10:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233180331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:32,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:32,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:32,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086367927] [2021-08-12 19:10:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:32,259 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:32,407 INFO L93 Difference]: Finished difference Result 365 states and 1194 transitions. [2021-08-12 19:10:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:10:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:32,410 INFO L225 Difference]: With dead ends: 365 [2021-08-12 19:10:32,411 INFO L226 Difference]: Without dead ends: 348 [2021-08-12 19:10:32,412 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:10:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-12 19:10:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 140. [2021-08-12 19:10:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-08-12 19:10:32,434 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-08-12 19:10:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:32,434 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-08-12 19:10:32,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-08-12 19:10:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:32,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:32,435 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:32,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:10:32,435 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-08-12 19:10:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331590090] [2021-08-12 19:10:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:32,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:32,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331590090] [2021-08-12 19:10:32,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331590090] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:32,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:32,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:32,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166766328] [2021-08-12 19:10:32,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:32,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:32,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:32,671 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:32,903 INFO L93 Difference]: Finished difference Result 250 states and 720 transitions. [2021-08-12 19:10:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:32,907 INFO L225 Difference]: With dead ends: 250 [2021-08-12 19:10:32,907 INFO L226 Difference]: Without dead ends: 233 [2021-08-12 19:10:32,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-12 19:10:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 140. [2021-08-12 19:10:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-08-12 19:10:32,926 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-08-12 19:10:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:32,926 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-08-12 19:10:32,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-08-12 19:10:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:32,929 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:32,929 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:32,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:10:32,930 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-08-12 19:10:32,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:32,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572812699] [2021-08-12 19:10:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572812699] [2021-08-12 19:10:33,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572812699] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62712023] [2021-08-12 19:10:33,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:33,108 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,333 INFO L93 Difference]: Finished difference Result 373 states and 1219 transitions. [2021-08-12 19:10:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:10:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,336 INFO L225 Difference]: With dead ends: 373 [2021-08-12 19:10:33,336 INFO L226 Difference]: Without dead ends: 356 [2021-08-12 19:10:33,336 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:10:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-12 19:10:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 142. [2021-08-12 19:10:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-08-12 19:10:33,342 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-08-12 19:10:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,342 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-08-12 19:10:33,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-08-12 19:10:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:10:33,343 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,343 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:10:33,343 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-08-12 19:10:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887637950] [2021-08-12 19:10:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887637950] [2021-08-12 19:10:33,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887637950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139863488] [2021-08-12 19:10:33,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:33,480 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,604 INFO L93 Difference]: Finished difference Result 297 states and 920 transitions. [2021-08-12 19:10:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:10:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,607 INFO L225 Difference]: With dead ends: 297 [2021-08-12 19:10:33,607 INFO L226 Difference]: Without dead ends: 280 [2021-08-12 19:10:33,607 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-12 19:10:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 142. [2021-08-12 19:10:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-08-12 19:10:33,614 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-08-12 19:10:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,615 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-08-12 19:10:33,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-08-12 19:10:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:10:33,618 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,619 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:10:33,621 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-08-12 19:10:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082031319] [2021-08-12 19:10:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082031319] [2021-08-12 19:10:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082031319] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:10:33,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741266904] [2021-08-12 19:10:33,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:10:33,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:10:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,648 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,660 INFO L93 Difference]: Finished difference Result 221 states and 725 transitions. [2021-08-12 19:10:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:10:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:10:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,662 INFO L225 Difference]: With dead ends: 221 [2021-08-12 19:10:33,662 INFO L226 Difference]: Without dead ends: 166 [2021-08-12 19:10:33,666 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-12 19:10:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-08-12 19:10:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-08-12 19:10:33,671 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-08-12 19:10:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,671 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-08-12 19:10:33,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-08-12 19:10:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:10:33,672 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,672 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:10:33,672 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-08-12 19:10:33,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41402521] [2021-08-12 19:10:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41402521] [2021-08-12 19:10:33,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41402521] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:10:33,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981955396] [2021-08-12 19:10:33,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:10:33,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:10:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,689 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,699 INFO L93 Difference]: Finished difference Result 247 states and 813 transitions. [2021-08-12 19:10:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:10:33,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:10:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,700 INFO L225 Difference]: With dead ends: 247 [2021-08-12 19:10:33,700 INFO L226 Difference]: Without dead ends: 192 [2021-08-12 19:10:33,702 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-12 19:10:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-08-12 19:10:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-08-12 19:10:33,709 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-08-12 19:10:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,709 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-08-12 19:10:33,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-08-12 19:10:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:10:33,710 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,710 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 19:10:33,710 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-08-12 19:10:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339066848] [2021-08-12 19:10:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339066848] [2021-08-12 19:10:33,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339066848] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:10:33,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928830217] [2021-08-12 19:10:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:10:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:10:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,740 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,754 INFO L93 Difference]: Finished difference Result 318 states and 1044 transitions. [2021-08-12 19:10:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:10:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:10:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,756 INFO L225 Difference]: With dead ends: 318 [2021-08-12 19:10:33,756 INFO L226 Difference]: Without dead ends: 223 [2021-08-12 19:10:33,758 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:10:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-12 19:10:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-08-12 19:10:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-08-12 19:10:33,765 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-08-12 19:10:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,765 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-08-12 19:10:33,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-08-12 19:10:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:33,766 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,766 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 19:10:33,766 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-08-12 19:10:33,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488810057] [2021-08-12 19:10:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:33,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488810057] [2021-08-12 19:10:33,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488810057] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853039536] [2021-08-12 19:10:33,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:33,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:33,806 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,836 INFO L93 Difference]: Finished difference Result 387 states and 1195 transitions. [2021-08-12 19:10:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,838 INFO L225 Difference]: With dead ends: 387 [2021-08-12 19:10:33,838 INFO L226 Difference]: Without dead ends: 305 [2021-08-12 19:10:33,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-12 19:10:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 229. [2021-08-12 19:10:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.280701754385965) internal successors, (748), 228 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 748 transitions. [2021-08-12 19:10:33,848 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 748 transitions. Word has length 16 [2021-08-12 19:10:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,849 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 748 transitions. [2021-08-12 19:10:33,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 748 transitions. [2021-08-12 19:10:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:33,850 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,850 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 19:10:33,850 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-08-12 19:10:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121384343] [2021-08-12 19:10:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:33,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121384343] [2021-08-12 19:10:33,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121384343] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:33,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:33,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647075035] [2021-08-12 19:10:33,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:33,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:33,875 INFO L87 Difference]: Start difference. First operand 229 states and 748 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:33,897 INFO L93 Difference]: Finished difference Result 372 states and 1125 transitions. [2021-08-12 19:10:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:33,899 INFO L225 Difference]: With dead ends: 372 [2021-08-12 19:10:33,899 INFO L226 Difference]: Without dead ends: 287 [2021-08-12 19:10:33,900 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-12 19:10:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 232. [2021-08-12 19:10:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.272727272727273) internal successors, (756), 231 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 756 transitions. [2021-08-12 19:10:33,910 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 756 transitions. Word has length 16 [2021-08-12 19:10:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:33,910 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 756 transitions. [2021-08-12 19:10:33,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 756 transitions. [2021-08-12 19:10:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:33,911 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:33,911 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:33,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 19:10:33,911 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-08-12 19:10:33,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:33,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416428472] [2021-08-12 19:10:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:33,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:33,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416428472] [2021-08-12 19:10:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416428472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:33,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620421495] [2021-08-12 19:10:33,945 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 [2021-08-12 19:10:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:10:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:34,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620421495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:34,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:34,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:10:34,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107951629] [2021-08-12 19:10:34,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:10:34,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:10:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:34,118 INFO L87 Difference]: Start difference. First operand 232 states and 756 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:34,208 INFO L93 Difference]: Finished difference Result 423 states and 1220 transitions. [2021-08-12 19:10:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:34,211 INFO L225 Difference]: With dead ends: 423 [2021-08-12 19:10:34,211 INFO L226 Difference]: Without dead ends: 334 [2021-08-12 19:10:34,212 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:10:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-12 19:10:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 232. [2021-08-12 19:10:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.2337662337662336) internal successors, (747), 231 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 747 transitions. [2021-08-12 19:10:34,228 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 747 transitions. Word has length 16 [2021-08-12 19:10:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:34,228 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 747 transitions. [2021-08-12 19:10:34,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 747 transitions. [2021-08-12 19:10:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:34,229 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:34,229 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:34,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-12 19:10:34,445 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1703674642, now seen corresponding path program 2 times [2021-08-12 19:10:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:34,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046926188] [2021-08-12 19:10:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:34,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:34,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046926188] [2021-08-12 19:10:34,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046926188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:34,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582101433] [2021-08-12 19:10:34,479 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 [2021-08-12 19:10:34,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:10:34,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:10:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:34,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582101433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:34,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:34,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:10:34,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770947877] [2021-08-12 19:10:34,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:10:34,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:34,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:10:34,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:34,601 INFO L87 Difference]: Start difference. First operand 232 states and 747 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:34,754 INFO L93 Difference]: Finished difference Result 627 states and 1819 transitions. [2021-08-12 19:10:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:10:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:34,758 INFO L225 Difference]: With dead ends: 627 [2021-08-12 19:10:34,758 INFO L226 Difference]: Without dead ends: 523 [2021-08-12 19:10:34,759 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:10:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-12 19:10:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 244. [2021-08-12 19:10:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2181069958847734) internal successors, (782), 243 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 782 transitions. [2021-08-12 19:10:34,771 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 782 transitions. Word has length 16 [2021-08-12 19:10:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:34,772 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 782 transitions. [2021-08-12 19:10:34,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 782 transitions. [2021-08-12 19:10:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:34,773 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:34,773 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:34,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 19:10:34,989 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 2 times [2021-08-12 19:10:34,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:34,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539652197] [2021-08-12 19:10:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:35,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539652197] [2021-08-12 19:10:35,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539652197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:35,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:35,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71352544] [2021-08-12 19:10:35,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:35,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:35,012 INFO L87 Difference]: Start difference. First operand 244 states and 782 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:35,071 INFO L93 Difference]: Finished difference Result 473 states and 1365 transitions. [2021-08-12 19:10:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:35,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:35,074 INFO L225 Difference]: With dead ends: 473 [2021-08-12 19:10:35,074 INFO L226 Difference]: Without dead ends: 346 [2021-08-12 19:10:35,074 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-12 19:10:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 215. [2021-08-12 19:10:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.177570093457944) internal successors, (680), 214 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 680 transitions. [2021-08-12 19:10:35,082 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 680 transitions. Word has length 16 [2021-08-12 19:10:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:35,082 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 680 transitions. [2021-08-12 19:10:35,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 680 transitions. [2021-08-12 19:10:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:35,083 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:35,083 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:35,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 19:10:35,083 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:35,083 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 3 times [2021-08-12 19:10:35,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:35,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523896894] [2021-08-12 19:10:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:35,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523896894] [2021-08-12 19:10:35,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523896894] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:35,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:35,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:35,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187639619] [2021-08-12 19:10:35,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:35,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:35,122 INFO L87 Difference]: Start difference. First operand 215 states and 680 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:35,187 INFO L93 Difference]: Finished difference Result 410 states and 1186 transitions. [2021-08-12 19:10:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:35,190 INFO L225 Difference]: With dead ends: 410 [2021-08-12 19:10:35,190 INFO L226 Difference]: Without dead ends: 381 [2021-08-12 19:10:35,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:10:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-12 19:10:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 215. [2021-08-12 19:10:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1682242990654204) internal successors, (678), 214 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 678 transitions. [2021-08-12 19:10:35,201 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 678 transitions. Word has length 16 [2021-08-12 19:10:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:35,201 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 678 transitions. [2021-08-12 19:10:35,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 678 transitions. [2021-08-12 19:10:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:35,202 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:35,202 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:35,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-12 19:10:35,202 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-08-12 19:10:35,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:35,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774319493] [2021-08-12 19:10:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:35,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774319493] [2021-08-12 19:10:35,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774319493] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:35,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:35,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:35,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3643337] [2021-08-12 19:10:35,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:35,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:35,248 INFO L87 Difference]: Start difference. First operand 215 states and 678 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:35,301 INFO L93 Difference]: Finished difference Result 416 states and 1167 transitions. [2021-08-12 19:10:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:35,304 INFO L225 Difference]: With dead ends: 416 [2021-08-12 19:10:35,304 INFO L226 Difference]: Without dead ends: 332 [2021-08-12 19:10:35,304 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:10:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-08-12 19:10:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 215. [2021-08-12 19:10:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1588785046728973) internal successors, (676), 214 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 676 transitions. [2021-08-12 19:10:35,316 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 676 transitions. Word has length 16 [2021-08-12 19:10:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:35,317 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 676 transitions. [2021-08-12 19:10:35,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 676 transitions. [2021-08-12 19:10:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:35,317 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:35,318 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:35,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-12 19:10:35,318 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1742439980, now seen corresponding path program 4 times [2021-08-12 19:10:35,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:35,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777978240] [2021-08-12 19:10:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:35,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777978240] [2021-08-12 19:10:35,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777978240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826169934] [2021-08-12 19:10:35,343 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 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 [2021-08-12 19:10:35,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:10:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:10:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:35,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826169934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:35,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:35,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:10:35,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8953079] [2021-08-12 19:10:35,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:10:35,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:35,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:10:35,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:10:35,476 INFO L87 Difference]: Start difference. First operand 215 states and 676 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:35,559 INFO L93 Difference]: Finished difference Result 402 states and 1120 transitions. [2021-08-12 19:10:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:35,562 INFO L225 Difference]: With dead ends: 402 [2021-08-12 19:10:35,562 INFO L226 Difference]: Without dead ends: 309 [2021-08-12 19:10:35,563 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:10:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-12 19:10:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 211. [2021-08-12 19:10:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1714285714285713) internal successors, (666), 210 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 666 transitions. [2021-08-12 19:10:35,572 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 666 transitions. Word has length 16 [2021-08-12 19:10:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:35,573 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 666 transitions. [2021-08-12 19:10:35,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 666 transitions. [2021-08-12 19:10:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:35,574 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:35,574 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:35,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:10:35,789 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -556629742, now seen corresponding path program 5 times [2021-08-12 19:10:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154058194] [2021-08-12 19:10:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:35,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154058194] [2021-08-12 19:10:35,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154058194] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:35,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:35,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957325200] [2021-08-12 19:10:35,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:35,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:35,818 INFO L87 Difference]: Start difference. First operand 211 states and 666 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:35,895 INFO L93 Difference]: Finished difference Result 348 states and 977 transitions. [2021-08-12 19:10:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:35,897 INFO L225 Difference]: With dead ends: 348 [2021-08-12 19:10:35,897 INFO L226 Difference]: Without dead ends: 319 [2021-08-12 19:10:35,898 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-12 19:10:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 211. [2021-08-12 19:10:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1619047619047618) internal successors, (664), 210 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 664 transitions. [2021-08-12 19:10:35,906 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 664 transitions. Word has length 16 [2021-08-12 19:10:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:35,906 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 664 transitions. [2021-08-12 19:10:35,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 664 transitions. [2021-08-12 19:10:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:35,907 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:35,907 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:35,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-12 19:10:35,907 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1337504340, now seen corresponding path program 6 times [2021-08-12 19:10:35,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:35,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791423275] [2021-08-12 19:10:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:35,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791423275] [2021-08-12 19:10:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791423275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477422947] [2021-08-12 19:10:35,931 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 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 [2021-08-12 19:10:35,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:10:35,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:10:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:36,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477422947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:36,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:36,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:10:36,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096085963] [2021-08-12 19:10:36,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:10:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:10:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:10:36,032 INFO L87 Difference]: Start difference. First operand 211 states and 664 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,237 INFO L93 Difference]: Finished difference Result 595 states and 1701 transitions. [2021-08-12 19:10:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:10:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,241 INFO L225 Difference]: With dead ends: 595 [2021-08-12 19:10:36,241 INFO L226 Difference]: Without dead ends: 517 [2021-08-12 19:10:36,241 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:10:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-12 19:10:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 211. [2021-08-12 19:10:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1523809523809523) internal successors, (662), 210 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 662 transitions. [2021-08-12 19:10:36,252 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 662 transitions. Word has length 16 [2021-08-12 19:10:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,252 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 662 transitions. [2021-08-12 19:10:36,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 662 transitions. [2021-08-12 19:10:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:36,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,253 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:36,471 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-08-12 19:10:36,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88296362] [2021-08-12 19:10:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88296362] [2021-08-12 19:10:36,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88296362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:10:36,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279959075] [2021-08-12 19:10:36,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:10:36,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:10:36,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:36,508 INFO L87 Difference]: Start difference. First operand 211 states and 662 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,570 INFO L93 Difference]: Finished difference Result 387 states and 1072 transitions. [2021-08-12 19:10:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:10:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,572 INFO L225 Difference]: With dead ends: 387 [2021-08-12 19:10:36,572 INFO L226 Difference]: Without dead ends: 303 [2021-08-12 19:10:36,573 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:10:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-12 19:10:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 203. [2021-08-12 19:10:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.118811881188119) internal successors, (630), 202 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 630 transitions. [2021-08-12 19:10:36,581 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 630 transitions. Word has length 16 [2021-08-12 19:10:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,582 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 630 transitions. [2021-08-12 19:10:36,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 630 transitions. [2021-08-12 19:10:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:10:36,582 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,582 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-12 19:10:36,582 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash -682046510, now seen corresponding path program 4 times [2021-08-12 19:10:36,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057274123] [2021-08-12 19:10:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057274123] [2021-08-12 19:10:36,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057274123] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321376019] [2021-08-12 19:10:36,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,597 INFO L87 Difference]: Start difference. First operand 203 states and 630 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,627 INFO L93 Difference]: Finished difference Result 242 states and 713 transitions. [2021-08-12 19:10:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-12 19:10:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,629 INFO L225 Difference]: With dead ends: 242 [2021-08-12 19:10:36,629 INFO L226 Difference]: Without dead ends: 199 [2021-08-12 19:10:36,629 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:10:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-12 19:10:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-08-12 19:10:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.126315789473684) internal successors, (594), 190 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 594 transitions. [2021-08-12 19:10:36,637 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 594 transitions. Word has length 16 [2021-08-12 19:10:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,637 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 594 transitions. [2021-08-12 19:10:36,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 594 transitions. [2021-08-12 19:10:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:10:36,638 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,639 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-12 19:10:36,639 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash -720277718, now seen corresponding path program 1 times [2021-08-12 19:10:36,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146773600] [2021-08-12 19:10:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146773600] [2021-08-12 19:10:36,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146773600] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333139934] [2021-08-12 19:10:36,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,660 INFO L87 Difference]: Start difference. First operand 191 states and 594 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,687 INFO L93 Difference]: Finished difference Result 326 states and 957 transitions. [2021-08-12 19:10:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-12 19:10:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,690 INFO L225 Difference]: With dead ends: 326 [2021-08-12 19:10:36,690 INFO L226 Difference]: Without dead ends: 281 [2021-08-12 19:10:36,691 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-12 19:10:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 228. [2021-08-12 19:10:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.101321585903084) internal successors, (704), 227 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 704 transitions. [2021-08-12 19:10:36,704 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 704 transitions. Word has length 18 [2021-08-12 19:10:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,704 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 704 transitions. [2021-08-12 19:10:36,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 704 transitions. [2021-08-12 19:10:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:10:36,705 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,705 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-12 19:10:36,705 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 147207058, now seen corresponding path program 1 times [2021-08-12 19:10:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904845850] [2021-08-12 19:10:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904845850] [2021-08-12 19:10:36,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904845850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3332740] [2021-08-12 19:10:36,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,718 INFO L87 Difference]: Start difference. First operand 228 states and 704 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,748 INFO L93 Difference]: Finished difference Result 342 states and 1006 transitions. [2021-08-12 19:10:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-12 19:10:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,751 INFO L225 Difference]: With dead ends: 342 [2021-08-12 19:10:36,751 INFO L226 Difference]: Without dead ends: 295 [2021-08-12 19:10:36,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-12 19:10:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 248. [2021-08-12 19:10:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0931174089068825) internal successors, (764), 247 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 764 transitions. [2021-08-12 19:10:36,765 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 764 transitions. Word has length 18 [2021-08-12 19:10:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,766 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 764 transitions. [2021-08-12 19:10:36,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 764 transitions. [2021-08-12 19:10:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:10:36,776 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,776 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 19:10:36,776 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash -992379222, now seen corresponding path program 2 times [2021-08-12 19:10:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935746631] [2021-08-12 19:10:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935746631] [2021-08-12 19:10:36,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935746631] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896086879] [2021-08-12 19:10:36,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,796 INFO L87 Difference]: Start difference. First operand 248 states and 764 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,822 INFO L93 Difference]: Finished difference Result 301 states and 890 transitions. [2021-08-12 19:10:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-12 19:10:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,824 INFO L225 Difference]: With dead ends: 301 [2021-08-12 19:10:36,824 INFO L226 Difference]: Without dead ends: 256 [2021-08-12 19:10:36,825 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-12 19:10:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-08-12 19:10:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.0142857142857142) internal successors, (633), 210 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2021-08-12 19:10:36,835 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 18 [2021-08-12 19:10:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,835 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2021-08-12 19:10:36,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2021-08-12 19:10:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:10:36,835 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,835 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-12 19:10:36,836 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1817656876, now seen corresponding path program 3 times [2021-08-12 19:10:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718370344] [2021-08-12 19:10:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:10:36,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718370344] [2021-08-12 19:10:36,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718370344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511541859] [2021-08-12 19:10:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,849 INFO L87 Difference]: Start difference. First operand 211 states and 633 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,870 INFO L93 Difference]: Finished difference Result 264 states and 759 transitions. [2021-08-12 19:10:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-12 19:10:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,872 INFO L225 Difference]: With dead ends: 264 [2021-08-12 19:10:36,872 INFO L226 Difference]: Without dead ends: 209 [2021-08-12 19:10:36,872 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-12 19:10:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-08-12 19:10:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0240384615384617) internal successors, (629), 208 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 629 transitions. [2021-08-12 19:10:36,881 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 629 transitions. Word has length 18 [2021-08-12 19:10:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,881 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 629 transitions. [2021-08-12 19:10:36,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 629 transitions. [2021-08-12 19:10:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:10:36,882 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,882 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-12 19:10:36,882 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1352829548, now seen corresponding path program 2 times [2021-08-12 19:10:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490592930] [2021-08-12 19:10:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:10:36,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:36,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490592930] [2021-08-12 19:10:36,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490592930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:10:36,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:10:36,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:10:36,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655596774] [2021-08-12 19:10:36,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:10:36,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:36,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:10:36,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,896 INFO L87 Difference]: Start difference. First operand 209 states and 629 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:36,915 INFO L93 Difference]: Finished difference Result 256 states and 740 transitions. [2021-08-12 19:10:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:10:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-12 19:10:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:36,917 INFO L225 Difference]: With dead ends: 256 [2021-08-12 19:10:36,917 INFO L226 Difference]: Without dead ends: 209 [2021-08-12 19:10:36,917 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:10:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-12 19:10:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 189. [2021-08-12 19:10:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-12 19:10:36,926 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-08-12 19:10:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:36,926 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-12 19:10:36,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-12 19:10:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-12 19:10:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:36,927 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:36,927 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-12 19:10:36,927 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-08-12 19:10:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:36,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848859926] [2021-08-12 19:10:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:37,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:37,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848859926] [2021-08-12 19:10:37,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848859926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:37,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454332110] [2021-08-12 19:10:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:10:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:37,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454332110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:37,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:37,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:10:37,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027144427] [2021-08-12 19:10:37,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:10:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:10:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:10:37,918 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:38,139 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-08-12 19:10:38,304 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-08-12 19:10:38,458 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-08-12 19:10:38,663 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 19:10:38,872 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-08-12 19:10:39,016 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-08-12 19:10:39,198 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-08-12 19:10:39,388 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 19:10:39,630 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-08-12 19:10:39,782 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-08-12 19:10:39,944 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-08-12 19:10:40,154 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-08-12 19:10:40,363 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-08-12 19:10:40,604 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-08-12 19:10:40,840 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2021-08-12 19:10:41,073 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-08-12 19:10:41,271 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-08-12 19:10:41,643 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-08-12 19:10:41,880 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-08-12 19:10:42,115 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-08-12 19:10:42,286 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-08-12 19:10:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:42,292 INFO L93 Difference]: Finished difference Result 858 states and 2369 transitions. [2021-08-12 19:10:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:10:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:10:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:42,297 INFO L225 Difference]: With dead ends: 858 [2021-08-12 19:10:42,297 INFO L226 Difference]: Without dead ends: 751 [2021-08-12 19:10:42,298 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4278.1ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:10:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-12 19:10:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 295. [2021-08-12 19:10:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-08-12 19:10:42,320 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 20 [2021-08-12 19:10:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:42,320 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-08-12 19:10:42,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-08-12 19:10:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:42,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:42,321 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:42,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:10:42,537 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 754443394, now seen corresponding path program 2 times [2021-08-12 19:10:42,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:42,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779722841] [2021-08-12 19:10:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:42,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:42,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779722841] [2021-08-12 19:10:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779722841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:42,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564653337] [2021-08-12 19:10:42,762 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 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 [2021-08-12 19:10:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:10:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:10:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:43,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564653337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:43,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:43,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:10:43,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207537698] [2021-08-12 19:10:43,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:10:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:10:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:10:43,351 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:43,697 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-08-12 19:10:43,914 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-08-12 19:10:44,157 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-08-12 19:10:44,363 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 19:10:44,557 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-08-12 19:10:44,705 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-08-12 19:10:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:44,897 INFO L93 Difference]: Finished difference Result 689 states and 1965 transitions. [2021-08-12 19:10:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:10:44,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:10:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:44,900 INFO L225 Difference]: With dead ends: 689 [2021-08-12 19:10:44,900 INFO L226 Difference]: Without dead ends: 568 [2021-08-12 19:10:44,901 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:10:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-12 19:10:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 301. [2021-08-12 19:10:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.07) internal successors, (921), 300 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 921 transitions. [2021-08-12 19:10:44,932 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 921 transitions. Word has length 20 [2021-08-12 19:10:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:44,932 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 921 transitions. [2021-08-12 19:10:44,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 921 transitions. [2021-08-12 19:10:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:44,933 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:44,933 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:45,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:10:45,137 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1024333752, now seen corresponding path program 3 times [2021-08-12 19:10:45,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:45,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696438336] [2021-08-12 19:10:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:45,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696438336] [2021-08-12 19:10:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696438336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:45,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761629812] [2021-08-12 19:10:45,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:10:45,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:10:45,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:10:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761629812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:46,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:46,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:10:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31260881] [2021-08-12 19:10:46,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:10:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:10:46,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:10:46,064 INFO L87 Difference]: Start difference. First operand 301 states and 921 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:46,291 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 19:10:46,656 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-08-12 19:10:47,156 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-08-12 19:10:47,480 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-08-12 19:10:47,874 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-08-12 19:10:48,088 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-08-12 19:10:48,245 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-08-12 19:10:48,498 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-08-12 19:10:48,797 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-08-12 19:10:49,146 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-08-12 19:10:49,507 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-08-12 19:10:49,831 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-08-12 19:10:50,389 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2021-08-12 19:10:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:50,414 INFO L93 Difference]: Finished difference Result 975 states and 2777 transitions. [2021-08-12 19:10:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:10:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:10:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:50,419 INFO L225 Difference]: With dead ends: 975 [2021-08-12 19:10:50,419 INFO L226 Difference]: Without dead ends: 898 [2021-08-12 19:10:50,420 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4222.5ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:10:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-12 19:10:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 345. [2021-08-12 19:10:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.2063953488372094) internal successors, (1103), 344 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-08-12 19:10:50,456 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-08-12 19:10:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:50,456 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-08-12 19:10:50,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-08-12 19:10:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:50,457 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:50,457 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:50,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:50,673 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1737852718, now seen corresponding path program 4 times [2021-08-12 19:10:50,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:50,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907690772] [2021-08-12 19:10:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:50,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:50,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907690772] [2021-08-12 19:10:50,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907690772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:50,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912678061] [2021-08-12 19:10:50,854 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 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 [2021-08-12 19:10:50,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:10:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:50,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:10:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912678061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:51,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:10:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713459514] [2021-08-12 19:10:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:10:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:10:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:10:51,462 INFO L87 Difference]: Start difference. First operand 345 states and 1103 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:51,825 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-08-12 19:10:51,996 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-08-12 19:10:52,220 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-08-12 19:10:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:52,441 INFO L93 Difference]: Finished difference Result 701 states and 2082 transitions. [2021-08-12 19:10:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:10:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:10:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:52,445 INFO L225 Difference]: With dead ends: 701 [2021-08-12 19:10:52,445 INFO L226 Difference]: Without dead ends: 684 [2021-08-12 19:10:52,445 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1050.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:10:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-12 19:10:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 353. [2021-08-12 19:10:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.215909090909091) internal successors, (1132), 352 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1132 transitions. [2021-08-12 19:10:52,484 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1132 transitions. Word has length 20 [2021-08-12 19:10:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:52,484 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1132 transitions. [2021-08-12 19:10:52,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1132 transitions. [2021-08-12 19:10:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:52,485 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:52,485 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:52,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:52,693 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1376626424, now seen corresponding path program 5 times [2021-08-12 19:10:52,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:52,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18242963] [2021-08-12 19:10:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:52,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:52,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18242963] [2021-08-12 19:10:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18242963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:52,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322695405] [2021-08-12 19:10:52,869 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 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 [2021-08-12 19:10:52,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:10:52,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:10:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:53,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322695405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:53,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:53,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:10:53,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828015562] [2021-08-12 19:10:53,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:10:53,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:10:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:10:53,492 INFO L87 Difference]: Start difference. First operand 353 states and 1132 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:10:54,512 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-08-12 19:10:54,861 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-08-12 19:10:55,438 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-08-12 19:10:55,668 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-08-12 19:10:55,922 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-08-12 19:10:56,119 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-08-12 19:10:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:10:56,225 INFO L93 Difference]: Finished difference Result 724 states and 2206 transitions. [2021-08-12 19:10:56,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:10:56,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:10:56,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:10:56,230 INFO L225 Difference]: With dead ends: 724 [2021-08-12 19:10:56,230 INFO L226 Difference]: Without dead ends: 677 [2021-08-12 19:10:56,231 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2394.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:10:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-08-12 19:10:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 366. [2021-08-12 19:10:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.23013698630137) internal successors, (1179), 365 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:10:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1179 transitions. [2021-08-12 19:10:56,276 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1179 transitions. Word has length 20 [2021-08-12 19:10:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:10:56,277 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1179 transitions. [2021-08-12 19:10:56,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:10:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1179 transitions. [2021-08-12 19:10:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:10:56,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:10:56,278 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:10:56,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:56,495 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:10:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:10:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash -191544444, now seen corresponding path program 6 times [2021-08-12 19:10:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:10:56,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697209108] [2021-08-12 19:10:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:10:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:10:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:56,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:10:56,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697209108] [2021-08-12 19:10:56,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697209108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:56,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818660706] [2021-08-12 19:10:56,702 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 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 [2021-08-12 19:10:56,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:10:56,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:10:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:10:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:10:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:10:57,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818660706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:10:57,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:10:57,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:10:57,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733986394] [2021-08-12 19:10:57,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:10:57,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:10:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:10:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:10:57,268 INFO L87 Difference]: Start difference. First operand 366 states and 1179 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:10:57,536 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-08-12 19:10:58,035 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-08-12 19:10:58,542 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-08-12 19:10:58,671 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-08-12 19:10:58,837 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-08-12 19:10:59,022 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-08-12 19:10:59,294 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-08-12 19:10:59,539 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-08-12 19:11:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:00,121 INFO L93 Difference]: Finished difference Result 859 states and 2481 transitions. [2021-08-12 19:11:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:11:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:00,127 INFO L225 Difference]: With dead ends: 859 [2021-08-12 19:11:00,127 INFO L226 Difference]: Without dead ends: 782 [2021-08-12 19:11:00,128 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2580.6ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:11:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-08-12 19:11:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 384. [2021-08-12 19:11:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.2767624020887727) internal successors, (1255), 383 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1255 transitions. [2021-08-12 19:11:00,174 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1255 transitions. Word has length 20 [2021-08-12 19:11:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:00,174 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1255 transitions. [2021-08-12 19:11:00,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1255 transitions. [2021-08-12 19:11:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:00,175 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:00,175 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:00,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:00,381 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1568508496, now seen corresponding path program 7 times [2021-08-12 19:11:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:00,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745266107] [2021-08-12 19:11:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:00,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:00,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745266107] [2021-08-12 19:11:00,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745266107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:00,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451292319] [2021-08-12 19:11:00,598 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 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 [2021-08-12 19:11:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:00,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451292319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:01,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:01,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155442000] [2021-08-12 19:11:01,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:01,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:01,223 INFO L87 Difference]: Start difference. First operand 384 states and 1255 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:01,874 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-08-12 19:11:02,311 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-08-12 19:11:02,716 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-08-12 19:11:03,189 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-08-12 19:11:03,445 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-08-12 19:11:03,890 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-08-12 19:11:04,115 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-08-12 19:11:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:04,361 INFO L93 Difference]: Finished difference Result 880 states and 2622 transitions. [2021-08-12 19:11:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:11:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:04,365 INFO L225 Difference]: With dead ends: 880 [2021-08-12 19:11:04,365 INFO L226 Difference]: Without dead ends: 788 [2021-08-12 19:11:04,365 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2868.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:11:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-08-12 19:11:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 400. [2021-08-12 19:11:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.2907268170426067) internal successors, (1313), 399 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1313 transitions. [2021-08-12 19:11:04,420 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1313 transitions. Word has length 20 [2021-08-12 19:11:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:04,420 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1313 transitions. [2021-08-12 19:11:04,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1313 transitions. [2021-08-12 19:11:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:04,421 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:04,421 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:04,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:04,637 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:04,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1496336488, now seen corresponding path program 8 times [2021-08-12 19:11:04,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:04,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986461916] [2021-08-12 19:11:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:04,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986461916] [2021-08-12 19:11:04,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986461916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666851216] [2021-08-12 19:11:04,786 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 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 [2021-08-12 19:11:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:11:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666851216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:05,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:05,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:05,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165144084] [2021-08-12 19:11:05,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:05,303 INFO L87 Difference]: Start difference. First operand 400 states and 1313 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:06,029 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-08-12 19:11:06,191 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-08-12 19:11:06,604 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-08-12 19:11:06,791 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-08-12 19:11:06,968 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-08-12 19:11:07,295 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-08-12 19:11:07,547 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-08-12 19:11:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:07,765 INFO L93 Difference]: Finished difference Result 927 states and 2712 transitions. [2021-08-12 19:11:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:11:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:07,769 INFO L225 Difference]: With dead ends: 927 [2021-08-12 19:11:07,770 INFO L226 Difference]: Without dead ends: 850 [2021-08-12 19:11:07,770 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2114.4ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:11:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-08-12 19:11:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 483. [2021-08-12 19:11:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.288381742738589) internal successors, (1585), 482 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1585 transitions. [2021-08-12 19:11:07,847 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1585 transitions. Word has length 20 [2021-08-12 19:11:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:07,847 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1585 transitions. [2021-08-12 19:11:07,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1585 transitions. [2021-08-12 19:11:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:07,848 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:07,848 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:08,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:08,065 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2112101588, now seen corresponding path program 9 times [2021-08-12 19:11:08,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:08,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621239130] [2021-08-12 19:11:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:08,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621239130] [2021-08-12 19:11:08,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621239130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50362911] [2021-08-12 19:11:08,392 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 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 [2021-08-12 19:11:08,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:11:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:08,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50362911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:08,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:08,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311726280] [2021-08-12 19:11:08,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:08,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:08,960 INFO L87 Difference]: Start difference. First operand 483 states and 1585 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:09,252 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-08-12 19:11:09,429 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-08-12 19:11:09,574 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-08-12 19:11:10,197 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-08-12 19:11:10,342 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-08-12 19:11:10,641 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-08-12 19:11:10,787 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-08-12 19:11:11,120 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-08-12 19:11:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:11,123 INFO L93 Difference]: Finished difference Result 852 states and 2613 transitions. [2021-08-12 19:11:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:11:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:11,127 INFO L225 Difference]: With dead ends: 852 [2021-08-12 19:11:11,127 INFO L226 Difference]: Without dead ends: 790 [2021-08-12 19:11:11,128 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2102.2ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:11:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-08-12 19:11:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 495. [2021-08-12 19:11:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.289473684210526) internal successors, (1625), 494 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1625 transitions. [2021-08-12 19:11:11,205 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1625 transitions. Word has length 20 [2021-08-12 19:11:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:11,205 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1625 transitions. [2021-08-12 19:11:11,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1625 transitions. [2021-08-12 19:11:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:11,206 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:11,206 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:11,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-08-12 19:11:11,421 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -997783728, now seen corresponding path program 10 times [2021-08-12 19:11:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:11,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599226007] [2021-08-12 19:11:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:11,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599226007] [2021-08-12 19:11:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599226007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676952939] [2021-08-12 19:11:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:11:11,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:11:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:11:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:12,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676952939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:12,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:12,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:12,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572114849] [2021-08-12 19:11:12,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:12,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:12,107 INFO L87 Difference]: Start difference. First operand 495 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:13,217 INFO L93 Difference]: Finished difference Result 821 states and 2548 transitions. [2021-08-12 19:11:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:11:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:13,221 INFO L225 Difference]: With dead ends: 821 [2021-08-12 19:11:13,221 INFO L226 Difference]: Without dead ends: 804 [2021-08-12 19:11:13,222 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:11:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-08-12 19:11:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 496. [2021-08-12 19:11:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.294949494949495) internal successors, (1631), 495 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1631 transitions. [2021-08-12 19:11:13,296 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1631 transitions. Word has length 20 [2021-08-12 19:11:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:13,297 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1631 transitions. [2021-08-12 19:11:13,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1631 transitions. [2021-08-12 19:11:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:13,298 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:13,298 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:13,513 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1938132120, now seen corresponding path program 11 times [2021-08-12 19:11:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119820497] [2021-08-12 19:11:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119820497] [2021-08-12 19:11:13,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119820497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627855215] [2021-08-12 19:11:13,728 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 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 [2021-08-12 19:11:13,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:11:13,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:11:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:14,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627855215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:14,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:14,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:11:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720617591] [2021-08-12 19:11:14,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:11:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:11:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:11:14,258 INFO L87 Difference]: Start difference. First operand 496 states and 1631 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:11:14,579 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-08-12 19:11:14,854 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-08-12 19:11:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:15,258 INFO L93 Difference]: Finished difference Result 726 states and 2273 transitions. [2021-08-12 19:11:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:11:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:11:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:15,261 INFO L225 Difference]: With dead ends: 726 [2021-08-12 19:11:15,261 INFO L226 Difference]: Without dead ends: 709 [2021-08-12 19:11:15,262 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 949.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:11:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-12 19:11:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 496. [2021-08-12 19:11:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.294949494949495) internal successors, (1631), 495 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1631 transitions. [2021-08-12 19:11:15,339 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1631 transitions. Word has length 20 [2021-08-12 19:11:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:15,339 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1631 transitions. [2021-08-12 19:11:15,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:11:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1631 transitions. [2021-08-12 19:11:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:15,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:15,340 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:15,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-12 19:11:15,557 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 762269212, now seen corresponding path program 12 times [2021-08-12 19:11:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:15,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486335975] [2021-08-12 19:11:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:15,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486335975] [2021-08-12 19:11:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486335975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872937011] [2021-08-12 19:11:15,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:15,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:11:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:11:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:16,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872937011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:16,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:16,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:16,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294456300] [2021-08-12 19:11:16,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:16,463 INFO L87 Difference]: Start difference. First operand 496 states and 1631 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:17,275 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-08-12 19:11:17,745 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-08-12 19:11:18,037 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-08-12 19:11:18,288 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-08-12 19:11:18,647 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-08-12 19:11:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:18,977 INFO L93 Difference]: Finished difference Result 916 states and 2866 transitions. [2021-08-12 19:11:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:11:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:18,980 INFO L225 Difference]: With dead ends: 916 [2021-08-12 19:11:18,980 INFO L226 Difference]: Without dead ends: 869 [2021-08-12 19:11:18,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2299.5ms TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:11:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-08-12 19:11:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 518. [2021-08-12 19:11:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.2959381044487426) internal successors, (1704), 517 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1704 transitions. [2021-08-12 19:11:19,062 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1704 transitions. Word has length 20 [2021-08-12 19:11:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:19,062 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1704 transitions. [2021-08-12 19:11:19,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1704 transitions. [2021-08-12 19:11:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:19,063 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:19,063 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:19,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-12 19:11:19,275 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash 174296510, now seen corresponding path program 13 times [2021-08-12 19:11:19,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:19,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93396793] [2021-08-12 19:11:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:19,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:19,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93396793] [2021-08-12 19:11:19,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93396793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:19,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538205279] [2021-08-12 19:11:19,477 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 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 [2021-08-12 19:11:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:19,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:19,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538205279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:19,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:19,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:19,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259335999] [2021-08-12 19:11:19,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:19,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:19,981 INFO L87 Difference]: Start difference. First operand 518 states and 1704 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:20,396 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-08-12 19:11:20,843 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-08-12 19:11:21,188 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-08-12 19:11:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:21,380 INFO L93 Difference]: Finished difference Result 783 states and 2422 transitions. [2021-08-12 19:11:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:11:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:21,383 INFO L225 Difference]: With dead ends: 783 [2021-08-12 19:11:21,383 INFO L226 Difference]: Without dead ends: 736 [2021-08-12 19:11:21,383 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1211.9ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:11:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-08-12 19:11:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 521. [2021-08-12 19:11:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.3038461538461537) internal successors, (1718), 520 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1718 transitions. [2021-08-12 19:11:21,468 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1718 transitions. Word has length 20 [2021-08-12 19:11:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:21,468 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1718 transitions. [2021-08-12 19:11:21,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1718 transitions. [2021-08-12 19:11:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:21,469 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:21,469 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:21,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-08-12 19:11:21,685 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1147131350, now seen corresponding path program 14 times [2021-08-12 19:11:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:21,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903798077] [2021-08-12 19:11:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:21,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903798077] [2021-08-12 19:11:21,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903798077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730735409] [2021-08-12 19:11:21,926 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 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 [2021-08-12 19:11:21,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:11:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:11:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730735409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901472194] [2021-08-12 19:11:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:22,570 INFO L87 Difference]: Start difference. First operand 521 states and 1718 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:22,731 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-08-12 19:11:23,386 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-08-12 19:11:23,793 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-08-12 19:11:24,290 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2021-08-12 19:11:24,509 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-08-12 19:11:25,049 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-08-12 19:11:25,285 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-08-12 19:11:26,029 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2021-08-12 19:11:26,302 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-08-12 19:11:26,604 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-08-12 19:11:27,051 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2021-08-12 19:11:27,583 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-08-12 19:11:28,216 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-08-12 19:11:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:28,228 INFO L93 Difference]: Finished difference Result 1140 states and 3469 transitions. [2021-08-12 19:11:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:11:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:28,231 INFO L225 Difference]: With dead ends: 1140 [2021-08-12 19:11:28,231 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 19:11:28,232 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 5062.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1502, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:11:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 19:11:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 536. [2021-08-12 19:11:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.317757009345794) internal successors, (1775), 535 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1775 transitions. [2021-08-12 19:11:28,335 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1775 transitions. Word has length 20 [2021-08-12 19:11:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:28,335 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1775 transitions. [2021-08-12 19:11:28,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1775 transitions. [2021-08-12 19:11:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:28,337 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:28,337 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:28,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-08-12 19:11:28,548 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1087596476, now seen corresponding path program 15 times [2021-08-12 19:11:28,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:28,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934307035] [2021-08-12 19:11:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:28,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:28,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934307035] [2021-08-12 19:11:28,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934307035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:28,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778787956] [2021-08-12 19:11:28,724 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 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 [2021-08-12 19:11:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:11:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:11:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:29,346 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-08-12 19:11:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:29,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778787956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:29,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:29,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:29,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311208078] [2021-08-12 19:11:29,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:29,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:29,469 INFO L87 Difference]: Start difference. First operand 536 states and 1775 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:29,828 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-08-12 19:11:30,071 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-08-12 19:11:30,383 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-08-12 19:11:30,656 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-08-12 19:11:30,956 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-08-12 19:11:31,218 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-08-12 19:11:31,412 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-08-12 19:11:31,694 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-08-12 19:11:32,000 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-08-12 19:11:32,654 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-08-12 19:11:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:32,677 INFO L93 Difference]: Finished difference Result 1146 states and 3488 transitions. [2021-08-12 19:11:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:11:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:32,680 INFO L225 Difference]: With dead ends: 1146 [2021-08-12 19:11:32,680 INFO L226 Difference]: Without dead ends: 1099 [2021-08-12 19:11:32,680 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2696.9ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:11:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-12 19:11:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 551. [2021-08-12 19:11:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.350909090909091) internal successors, (1843), 550 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1843 transitions. [2021-08-12 19:11:32,782 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1843 transitions. Word has length 20 [2021-08-12 19:11:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:32,782 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1843 transitions. [2021-08-12 19:11:32,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1843 transitions. [2021-08-12 19:11:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:32,783 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:32,783 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:32,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:32,992 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1635816502, now seen corresponding path program 16 times [2021-08-12 19:11:32,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:32,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055589029] [2021-08-12 19:11:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:33,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:33,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055589029] [2021-08-12 19:11:33,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055589029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:33,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065411765] [2021-08-12 19:11:33,177 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 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 [2021-08-12 19:11:33,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:11:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:33,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065411765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:33,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:33,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677642040] [2021-08-12 19:11:33,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:33,784 INFO L87 Difference]: Start difference. First operand 551 states and 1843 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:34,100 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-08-12 19:11:34,496 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-08-12 19:11:34,710 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-08-12 19:11:34,995 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-08-12 19:11:35,119 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-08-12 19:11:35,292 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-08-12 19:11:35,665 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-08-12 19:11:35,836 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-08-12 19:11:36,030 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-08-12 19:11:36,389 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-08-12 19:11:36,557 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-08-12 19:11:36,830 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-08-12 19:11:37,149 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-08-12 19:11:37,440 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-08-12 19:11:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:37,927 INFO L93 Difference]: Finished difference Result 1253 states and 3887 transitions. [2021-08-12 19:11:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:11:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:37,930 INFO L225 Difference]: With dead ends: 1253 [2021-08-12 19:11:37,930 INFO L226 Difference]: Without dead ends: 1206 [2021-08-12 19:11:37,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3324.2ms TimeCoverageRelationStatistics Valid=367, Invalid=1525, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:11:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-08-12 19:11:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 578. [2021-08-12 19:11:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.4003466204506068) internal successors, (1962), 577 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1962 transitions. [2021-08-12 19:11:38,050 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1962 transitions. Word has length 20 [2021-08-12 19:11:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:38,050 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1962 transitions. [2021-08-12 19:11:38,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1962 transitions. [2021-08-12 19:11:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:38,051 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:38,051 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:38,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-08-12 19:11:38,252 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 17 times [2021-08-12 19:11:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542473931] [2021-08-12 19:11:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:38,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542473931] [2021-08-12 19:11:38,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542473931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206279396] [2021-08-12 19:11:38,429 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 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 [2021-08-12 19:11:38,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:11:38,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:11:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206279396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:38,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:38,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:11:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132319904] [2021-08-12 19:11:38,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:11:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:11:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:11:38,941 INFO L87 Difference]: Start difference. First operand 578 states and 1962 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:11:39,692 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-08-12 19:11:40,030 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-08-12 19:11:40,226 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-08-12 19:11:40,373 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-08-12 19:11:40,811 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-08-12 19:11:40,996 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-08-12 19:11:41,215 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-08-12 19:11:41,389 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-08-12 19:11:41,798 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-08-12 19:11:42,038 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-08-12 19:11:42,248 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-08-12 19:11:42,510 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-08-12 19:11:43,151 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-08-12 19:11:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:43,820 INFO L93 Difference]: Finished difference Result 1138 states and 3548 transitions. [2021-08-12 19:11:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:11:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:11:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:43,823 INFO L225 Difference]: With dead ends: 1138 [2021-08-12 19:11:43,823 INFO L226 Difference]: Without dead ends: 1121 [2021-08-12 19:11:43,824 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 3823.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:11:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-08-12 19:11:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 587. [2021-08-12 19:11:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.3890784982935154) internal successors, (1986), 586 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1986 transitions. [2021-08-12 19:11:43,948 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1986 transitions. Word has length 20 [2021-08-12 19:11:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:43,948 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1986 transitions. [2021-08-12 19:11:43,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:11:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1986 transitions. [2021-08-12 19:11:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:43,949 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:43,949 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:44,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-08-12 19:11:44,165 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash 598607746, now seen corresponding path program 18 times [2021-08-12 19:11:44,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:44,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445625624] [2021-08-12 19:11:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:44,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:44,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445625624] [2021-08-12 19:11:44,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445625624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:44,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009127760] [2021-08-12 19:11:44,346 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 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 [2021-08-12 19:11:44,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:11:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:44,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009127760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:44,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:44,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:44,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153718244] [2021-08-12 19:11:44,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:44,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:44,832 INFO L87 Difference]: Start difference. First operand 587 states and 1986 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:45,446 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-08-12 19:11:45,781 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-08-12 19:11:46,015 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-08-12 19:11:46,356 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-08-12 19:11:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:46,633 INFO L93 Difference]: Finished difference Result 901 states and 2816 transitions. [2021-08-12 19:11:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:11:46,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:46,636 INFO L225 Difference]: With dead ends: 901 [2021-08-12 19:11:46,637 INFO L226 Difference]: Without dead ends: 854 [2021-08-12 19:11:46,637 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:11:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-08-12 19:11:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 602. [2021-08-12 19:11:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.3910149750415974) internal successors, (2038), 601 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 2038 transitions. [2021-08-12 19:11:46,768 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 2038 transitions. Word has length 20 [2021-08-12 19:11:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:46,768 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 2038 transitions. [2021-08-12 19:11:46,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 2038 transitions. [2021-08-12 19:11:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:46,769 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:46,769 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:46,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:46,979 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:46,979 INFO L82 PathProgramCache]: Analyzing trace with hash 109805262, now seen corresponding path program 19 times [2021-08-12 19:11:46,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:46,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667261028] [2021-08-12 19:11:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:47,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:47,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667261028] [2021-08-12 19:11:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667261028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:47,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176888943] [2021-08-12 19:11:47,152 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 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 [2021-08-12 19:11:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:47,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:11:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176888943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607252853] [2021-08-12 19:11:47,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:47,706 INFO L87 Difference]: Start difference. First operand 602 states and 2038 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:48,425 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-08-12 19:11:48,714 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-08-12 19:11:49,190 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-08-12 19:11:49,436 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-08-12 19:11:49,911 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-08-12 19:11:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:50,445 INFO L93 Difference]: Finished difference Result 1092 states and 3383 transitions. [2021-08-12 19:11:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:11:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:50,449 INFO L225 Difference]: With dead ends: 1092 [2021-08-12 19:11:50,449 INFO L226 Difference]: Without dead ends: 1045 [2021-08-12 19:11:50,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2001.4ms TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:11:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-12 19:11:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 617. [2021-08-12 19:11:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.387987012987013) internal successors, (2087), 616 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 2087 transitions. [2021-08-12 19:11:50,608 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 2087 transitions. Word has length 20 [2021-08-12 19:11:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:50,608 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 2087 transitions. [2021-08-12 19:11:50,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 2087 transitions. [2021-08-12 19:11:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:50,609 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:50,609 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:50,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-08-12 19:11:50,810 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1227590060, now seen corresponding path program 20 times [2021-08-12 19:11:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772026305] [2021-08-12 19:11:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:50,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:50,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772026305] [2021-08-12 19:11:50,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772026305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:50,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499871879] [2021-08-12 19:11:50,959 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 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 [2021-08-12 19:11:51,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:11:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499871879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:51,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:51,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877773075] [2021-08-12 19:11:51,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:51,451 INFO L87 Difference]: Start difference. First operand 617 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:52,174 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-08-12 19:11:52,604 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-08-12 19:11:52,816 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-08-12 19:11:53,087 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-08-12 19:11:53,277 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-08-12 19:11:53,774 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-08-12 19:11:54,010 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-08-12 19:11:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:54,574 INFO L93 Difference]: Finished difference Result 1191 states and 3582 transitions. [2021-08-12 19:11:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:11:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:54,577 INFO L225 Difference]: With dead ends: 1191 [2021-08-12 19:11:54,577 INFO L226 Difference]: Without dead ends: 1114 [2021-08-12 19:11:54,578 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2146.2ms TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:11:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-12 19:11:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 616. [2021-08-12 19:11:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.3821138211382116) internal successors, (2080), 615 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2080 transitions. [2021-08-12 19:11:54,754 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2080 transitions. Word has length 20 [2021-08-12 19:11:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:54,754 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 2080 transitions. [2021-08-12 19:11:54,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2080 transitions. [2021-08-12 19:11:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:54,755 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:54,755 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:11:54,969 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1673593458, now seen corresponding path program 21 times [2021-08-12 19:11:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:54,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715498174] [2021-08-12 19:11:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:55,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:55,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715498174] [2021-08-12 19:11:55,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715498174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:55,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448309463] [2021-08-12 19:11:55,131 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 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 [2021-08-12 19:11:55,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:11:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:11:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448309463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:55,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:55,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:55,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396117785] [2021-08-12 19:11:55,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:55,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:55,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:55,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:55,646 INFO L87 Difference]: Start difference. First operand 616 states and 2080 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:56,245 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-08-12 19:11:56,522 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-08-12 19:11:56,667 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-08-12 19:11:56,963 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-08-12 19:11:57,200 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-08-12 19:11:57,590 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-08-12 19:11:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:11:57,964 INFO L93 Difference]: Finished difference Result 902 states and 2840 transitions. [2021-08-12 19:11:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:11:57,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:11:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:11:57,967 INFO L225 Difference]: With dead ends: 902 [2021-08-12 19:11:57,967 INFO L226 Difference]: Without dead ends: 855 [2021-08-12 19:11:57,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1739.2ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:11:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-08-12 19:11:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 610. [2021-08-12 19:11:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.3842364532019706) internal successors, (2061), 609 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:11:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2061 transitions. [2021-08-12 19:11:58,128 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2061 transitions. Word has length 20 [2021-08-12 19:11:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:11:58,128 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 2061 transitions. [2021-08-12 19:11:58,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:11:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2061 transitions. [2021-08-12 19:11:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:11:58,129 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:11:58,129 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:11:58,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-08-12 19:11:58,330 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:11:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:11:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1184790974, now seen corresponding path program 22 times [2021-08-12 19:11:58,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:11:58,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707296117] [2021-08-12 19:11:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:11:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:11:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:58,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:11:58,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707296117] [2021-08-12 19:11:58,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707296117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:58,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086698138] [2021-08-12 19:11:58,484 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 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 [2021-08-12 19:11:58,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:11:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:11:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:11:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:11:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:11:59,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086698138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:11:59,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:11:59,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:11:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218606067] [2021-08-12 19:11:59,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:11:59,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:11:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:11:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:11:59,007 INFO L87 Difference]: Start difference. First operand 610 states and 2061 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:12:00,048 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-08-12 19:12:00,481 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-08-12 19:12:00,698 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-08-12 19:12:01,080 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-08-12 19:12:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:01,662 INFO L93 Difference]: Finished difference Result 1039 states and 3233 transitions. [2021-08-12 19:12:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:12:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-08-12 19:12:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:01,665 INFO L225 Difference]: With dead ends: 1039 [2021-08-12 19:12:01,665 INFO L226 Difference]: Without dead ends: 1007 [2021-08-12 19:12:01,666 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1776.8ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:12:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-08-12 19:12:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 607. [2021-08-12 19:12:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.387788778877888) internal successors, (2053), 606 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 2053 transitions. [2021-08-12 19:12:01,835 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 2053 transitions. Word has length 20 [2021-08-12 19:12:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:01,835 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 2053 transitions. [2021-08-12 19:12:01,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2021-08-12 19:12:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 2053 transitions. [2021-08-12 19:12:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:01,836 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:01,836 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:02,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:02,049 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2080320032, now seen corresponding path program 23 times [2021-08-12 19:12:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:02,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121711938] [2021-08-12 19:12:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:02,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121711938] [2021-08-12 19:12:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121711938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799260933] [2021-08-12 19:12:02,236 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 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 [2021-08-12 19:12:02,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:12:02,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:12:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:02,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799260933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:02,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:02,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:12:02,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684168463] [2021-08-12 19:12:02,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:12:02,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:02,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:12:02,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:12:02,757 INFO L87 Difference]: Start difference. First operand 607 states and 2053 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:12:03,634 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-08-12 19:12:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:04,176 INFO L93 Difference]: Finished difference Result 826 states and 2662 transitions. [2021-08-12 19:12:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:12:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:12:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:04,178 INFO L225 Difference]: With dead ends: 826 [2021-08-12 19:12:04,178 INFO L226 Difference]: Without dead ends: 794 [2021-08-12 19:12:04,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 926.9ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:12:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-08-12 19:12:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 616. [2021-08-12 19:12:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.401626016260163) internal successors, (2092), 615 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2092 transitions. [2021-08-12 19:12:04,346 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2092 transitions. Word has length 20 [2021-08-12 19:12:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:04,346 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 2092 transitions. [2021-08-12 19:12:04,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:12:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2092 transitions. [2021-08-12 19:12:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:04,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:04,347 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:04,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-08-12 19:12:04,548 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1998920976, now seen corresponding path program 24 times [2021-08-12 19:12:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:04,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987352422] [2021-08-12 19:12:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:04,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:04,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987352422] [2021-08-12 19:12:04,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987352422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:04,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838926474] [2021-08-12 19:12:04,733 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 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 [2021-08-12 19:12:04,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:12:04,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:05,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,069 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 9 treesize of output 1 [2021-08-12 19:12:05,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,076 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 10 treesize of output 1 [2021-08-12 19:12:05,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,088 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 10 treesize of output 1 [2021-08-12 19:12:05,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,094 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 8 treesize of output 1 [2021-08-12 19:12:05,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,110 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 10 treesize of output 1 [2021-08-12 19:12:05,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,115 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 7 treesize of output 1 [2021-08-12 19:12:05,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,121 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 9 treesize of output 2 [2021-08-12 19:12:05,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,127 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 8 treesize of output 1 [2021-08-12 19:12:05,127 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,133 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,140 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,145 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 9 treesize of output 2 [2021-08-12 19:12:05,150 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,156 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 10 treesize of output 1 [2021-08-12 19:12:05,156 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,172 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 8 treesize of output 1 [2021-08-12 19:12:05,173 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,179 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,183 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 10 treesize of output 1 [2021-08-12 19:12:05,184 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,190 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,194 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 9 treesize of output 1 [2021-08-12 19:12:05,195 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,200 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 8 treesize of output 1 [2021-08-12 19:12:05,200 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,210 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 7 treesize of output 1 [2021-08-12 19:12:05,211 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,216 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 10 treesize of output 1 [2021-08-12 19:12:05,216 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,220 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 8 treesize of output 1 [2021-08-12 19:12:05,221 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,226 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 9 treesize of output 2 [2021-08-12 19:12:05,227 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:05,235 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:05,239 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 10 treesize of output 1 [2021-08-12 19:12:05,240 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:05,511 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-08-12 19:12:05,512 INFO L628 ElimStorePlain]: treesize reduction 92, result has 76.5 percent of original size [2021-08-12 19:12:05,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:12:05,517 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:971, output treesize:300 [2021-08-12 19:12:05,815 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-08-12 19:12:06,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:06,745 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 10 treesize of output 1 [2021-08-12 19:12:06,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:06,855 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-08-12 19:12:06,856 INFO L628 ElimStorePlain]: treesize reduction 71, result has 60.1 percent of original size [2021-08-12 19:12:06,856 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-08-12 19:12:06,859 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 4 treesize of output 2 [2021-08-12 19:12:06,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:06,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:06,932 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 5 treesize of output 1 [2021-08-12 19:12:06,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:06,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:06,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-08-12 19:12:06,983 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 6 treesize of output 2 [2021-08-12 19:12:06,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:07,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:07,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:12:07,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:210, output treesize:92 [2021-08-12 19:12:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:07,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838926474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:07,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:07,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:07,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018382077] [2021-08-12 19:12:07,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:07,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:07,166 INFO L87 Difference]: Start difference. First operand 616 states and 2092 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:07,667 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-08-12 19:12:07,933 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-08-12 19:12:08,324 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2021-08-12 19:12:08,710 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2021-08-12 19:12:09,104 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-08-12 19:12:09,615 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-08-12 19:12:10,064 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 77 [2021-08-12 19:12:10,460 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-08-12 19:12:11,064 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2021-08-12 19:12:11,529 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 86 [2021-08-12 19:12:12,139 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 74 [2021-08-12 19:12:12,510 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 77 [2021-08-12 19:12:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:13,109 INFO L93 Difference]: Finished difference Result 1086 states and 3416 transitions. [2021-08-12 19:12:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:12:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:13,112 INFO L225 Difference]: With dead ends: 1086 [2021-08-12 19:12:13,112 INFO L226 Difference]: Without dead ends: 1039 [2021-08-12 19:12:13,113 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 5062.7ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:12:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-08-12 19:12:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 632. [2021-08-12 19:12:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.380348652931854) internal successors, (2133), 631 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2133 transitions. [2021-08-12 19:12:13,310 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2133 transitions. Word has length 20 [2021-08-12 19:12:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2133 transitions. [2021-08-12 19:12:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2133 transitions. [2021-08-12 19:12:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:13,311 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:13,311 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-08-12 19:12:13,512 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -998509850, now seen corresponding path program 25 times [2021-08-12 19:12:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:13,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083660242] [2021-08-12 19:12:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:13,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083660242] [2021-08-12 19:12:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083660242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555690113] [2021-08-12 19:12:13,705 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 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 [2021-08-12 19:12:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,202 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 10 treesize of output 1 [2021-08-12 19:12:14,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,207 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 10 treesize of output 1 [2021-08-12 19:12:14,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,214 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 10 treesize of output 1 [2021-08-12 19:12:14,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,220 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 10 treesize of output 1 [2021-08-12 19:12:14,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,225 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 9 treesize of output 1 [2021-08-12 19:12:14,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,232 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 9 treesize of output 2 [2021-08-12 19:12:14,232 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,237 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 10 treesize of output 1 [2021-08-12 19:12:14,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,243 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 8 treesize of output 1 [2021-08-12 19:12:14,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,248 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 8 treesize of output 1 [2021-08-12 19:12:14,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:14,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:14,260 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,266 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 9 treesize of output 2 [2021-08-12 19:12:14,267 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,271 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 8 treesize of output 1 [2021-08-12 19:12:14,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:14,278 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,283 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 7 treesize of output 1 [2021-08-12 19:12:14,284 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,289 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 10 treesize of output 1 [2021-08-12 19:12:14,290 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,295 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 9 treesize of output 1 [2021-08-12 19:12:14,296 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,300 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 8 treesize of output 1 [2021-08-12 19:12:14,301 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,306 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 7 treesize of output 1 [2021-08-12 19:12:14,307 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:14,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:14,312 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:14,466 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-08-12 19:12:14,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:14,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:12:14,472 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:869, output treesize:350 [2021-08-12 19:12:14,763 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2021-08-12 19:12:15,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:15,715 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 9 treesize of output 1 [2021-08-12 19:12:15,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:15,988 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 85 [2021-08-12 19:12:15,989 INFO L628 ElimStorePlain]: treesize reduction 327, result has 44.1 percent of original size [2021-08-12 19:12:15,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-08-12 19:12:15,994 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 4 treesize of output 2 [2021-08-12 19:12:15,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,117 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-08-12 19:12:16,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_14 vanished before elimination [2021-08-12 19:12:16,121 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 3 treesize of output 1 [2021-08-12 19:12:16,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,242 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 19:12:16,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_12 vanished before elimination [2021-08-12 19:12:16,247 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 3 treesize of output 1 [2021-08-12 19:12:16,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,366 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-08-12 19:12:16,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-08-12 19:12:16,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2021-08-12 19:12:16,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-08-12 19:12:16,370 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 4 treesize of output 2 [2021-08-12 19:12:16,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,488 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-08-12 19:12:16,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,492 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 4 treesize of output 2 [2021-08-12 19:12:16,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,606 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-08-12 19:12:16,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,610 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 3 treesize of output 1 [2021-08-12 19:12:16,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,728 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-08-12 19:12:16,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,732 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 4 treesize of output 2 [2021-08-12 19:12:16,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:16,849 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-08-12 19:12:16,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:16,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-08-12 19:12:16,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2021-08-12 19:12:16,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:12:16,853 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:593, output treesize:201 [2021-08-12 19:12:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:17,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555690113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:17,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:17,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531374409] [2021-08-12 19:12:17,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:17,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:17,227 INFO L87 Difference]: Start difference. First operand 632 states and 2133 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:18,104 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-08-12 19:12:18,355 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-08-12 19:12:18,736 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-08-12 19:12:19,075 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-08-12 19:12:19,497 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-08-12 19:12:19,722 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-08-12 19:12:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:20,124 INFO L93 Difference]: Finished difference Result 903 states and 2899 transitions. [2021-08-12 19:12:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:12:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:20,127 INFO L225 Difference]: With dead ends: 903 [2021-08-12 19:12:20,127 INFO L226 Difference]: Without dead ends: 826 [2021-08-12 19:12:20,127 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2411.9ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:12:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-12 19:12:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 629. [2021-08-12 19:12:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.378980891719745) internal successors, (2122), 628 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2122 transitions. [2021-08-12 19:12:20,329 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2122 transitions. Word has length 20 [2021-08-12 19:12:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:20,329 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2122 transitions. [2021-08-12 19:12:20,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2122 transitions. [2021-08-12 19:12:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:20,330 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:20,330 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:20,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-08-12 19:12:20,531 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash 761543090, now seen corresponding path program 26 times [2021-08-12 19:12:20,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:20,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894540926] [2021-08-12 19:12:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:20,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894540926] [2021-08-12 19:12:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894540926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170290752] [2021-08-12 19:12:20,753 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 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 [2021-08-12 19:12:20,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:12:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:12:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:21,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,779 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 9 treesize of output 1 [2021-08-12 19:12:21,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-12 19:12:21,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,833 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 10 treesize of output 1 [2021-08-12 19:12:21,834 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,842 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 10 treesize of output 1 [2021-08-12 19:12:21,843 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,851 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 9 treesize of output 2 [2021-08-12 19:12:21,852 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,860 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 7 treesize of output 1 [2021-08-12 19:12:21,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,868 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,875 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,881 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,888 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 8 treesize of output 1 [2021-08-12 19:12:21,888 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,896 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:21,906 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,914 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:21,925 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,931 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:21,938 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,945 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 9 treesize of output 2 [2021-08-12 19:12:21,946 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:21,953 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,960 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 8 treesize of output 1 [2021-08-12 19:12:21,961 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,967 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 7 treesize of output 1 [2021-08-12 19:12:21,968 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:21,976 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,983 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 9 treesize of output 1 [2021-08-12 19:12:21,984 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:21,992 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:21,999 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 10 treesize of output 1 [2021-08-12 19:12:22,000 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:22,006 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,013 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 10 treesize of output 1 [2021-08-12 19:12:22,013 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,022 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 10 treesize of output 1 [2021-08-12 19:12:22,022 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,030 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 10 treesize of output 1 [2021-08-12 19:12:22,031 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:22,041 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,051 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 8 treesize of output 1 [2021-08-12 19:12:22,051 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,058 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 10 treesize of output 1 [2021-08-12 19:12:22,059 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:22,065 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 8 treesize of output 1 [2021-08-12 19:12:22,065 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:22,072 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:22,078 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,368 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-08-12 19:12:22,369 INFO L628 ElimStorePlain]: treesize reduction 97, result has 75.2 percent of original size [2021-08-12 19:12:22,373 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 4 treesize of output 2 [2021-08-12 19:12:22,374 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,377 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 4 treesize of output 2 [2021-08-12 19:12:22,378 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,381 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 3 treesize of output 1 [2021-08-12 19:12:22,382 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,385 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 4 treesize of output 2 [2021-08-12 19:12:22,386 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,389 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 3 treesize of output 1 [2021-08-12 19:12:22,390 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,394 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 4 treesize of output 2 [2021-08-12 19:12:22,395 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:22,514 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-08-12 19:12:22,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:22,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-08-12 19:12:22,518 INFO L247 ElimStorePlain]: Needed 47 recursive calls to eliminate 3 variables, input treesize:1693, output treesize:240 [2021-08-12 19:12:22,714 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-08-12 19:12:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:22,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170290752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:22,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:22,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:22,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739262527] [2021-08-12 19:12:22,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:22,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:22,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:22,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:22,990 INFO L87 Difference]: Start difference. First operand 629 states and 2122 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:23,125 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-08-12 19:12:24,083 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-08-12 19:12:24,599 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-08-12 19:12:24,809 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-08-12 19:12:25,289 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-08-12 19:12:25,504 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-08-12 19:12:26,517 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-08-12 19:12:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:26,526 INFO L93 Difference]: Finished difference Result 999 states and 3174 transitions. [2021-08-12 19:12:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:12:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:26,529 INFO L225 Difference]: With dead ends: 999 [2021-08-12 19:12:26,529 INFO L226 Difference]: Without dead ends: 937 [2021-08-12 19:12:26,529 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2747.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:12:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-08-12 19:12:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 636. [2021-08-12 19:12:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.3858267716535435) internal successors, (2150), 635 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 2150 transitions. [2021-08-12 19:12:26,711 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 2150 transitions. Word has length 20 [2021-08-12 19:12:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:26,711 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 2150 transitions. [2021-08-12 19:12:26,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 2150 transitions. [2021-08-12 19:12:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:26,712 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:26,712 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:26,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:26,913 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -750476354, now seen corresponding path program 27 times [2021-08-12 19:12:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331625873] [2021-08-12 19:12:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:27,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331625873] [2021-08-12 19:12:27,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331625873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88310085] [2021-08-12 19:12:27,107 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 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 [2021-08-12 19:12:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:12:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,250 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 8 treesize of output 1 [2021-08-12 19:12:28,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,259 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 7 treesize of output 1 [2021-08-12 19:12:28,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,265 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 10 treesize of output 1 [2021-08-12 19:12:28,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,289 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 10 treesize of output 1 [2021-08-12 19:12:28,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,295 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 9 treesize of output 1 [2021-08-12 19:12:28,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,302 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,306 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,309 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 9 treesize of output 2 [2021-08-12 19:12:28,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,315 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 7 treesize of output 1 [2021-08-12 19:12:28,316 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,319 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 8 treesize of output 1 [2021-08-12 19:12:28,320 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,323 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 10 treesize of output 1 [2021-08-12 19:12:28,324 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:28,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:28,328 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:28,333 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,445 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-08-12 19:12:28,446 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-08-12 19:12:28,449 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 3 treesize of output 1 [2021-08-12 19:12:28,450 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,455 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 5 treesize of output 1 [2021-08-12 19:12:28,456 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,459 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 3 treesize of output 1 [2021-08-12 19:12:28,460 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,463 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 4 treesize of output 2 [2021-08-12 19:12:28,463 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,466 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 4 treesize of output 2 [2021-08-12 19:12:28,467 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:28,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:28,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:12:28,515 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-08-12 19:12:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88310085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:28,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:28,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:28,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115915562] [2021-08-12 19:12:28,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:28,623 INFO L87 Difference]: Start difference. First operand 636 states and 2150 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:28,872 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-08-12 19:12:29,113 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-08-12 19:12:29,375 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-08-12 19:12:29,700 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-08-12 19:12:29,865 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-08-12 19:12:30,062 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-08-12 19:12:30,260 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-08-12 19:12:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:31,094 INFO L93 Difference]: Finished difference Result 795 states and 2564 transitions. [2021-08-12 19:12:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:12:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:31,101 INFO L225 Difference]: With dead ends: 795 [2021-08-12 19:12:31,101 INFO L226 Difference]: Without dead ends: 763 [2021-08-12 19:12:31,101 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1883.4ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:12:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-08-12 19:12:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 645. [2021-08-12 19:12:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.391304347826087) internal successors, (2184), 644 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2184 transitions. [2021-08-12 19:12:31,306 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2184 transitions. Word has length 20 [2021-08-12 19:12:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:31,306 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2184 transitions. [2021-08-12 19:12:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2184 transitions. [2021-08-12 19:12:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:31,307 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:31,307 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:31,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:31,508 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -807827858, now seen corresponding path program 28 times [2021-08-12 19:12:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366851180] [2021-08-12 19:12:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:31,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:31,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366851180] [2021-08-12 19:12:31,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366851180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:31,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739246957] [2021-08-12 19:12:31,682 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 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 [2021-08-12 19:12:31,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:12:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:32,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,571 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 9 treesize of output 2 [2021-08-12 19:12:32,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,580 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,584 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 7 treesize of output 1 [2021-08-12 19:12:32,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,589 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,595 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,599 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:32,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,610 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 10 treesize of output 1 [2021-08-12 19:12:32,610 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,616 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 9 treesize of output 1 [2021-08-12 19:12:32,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,621 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 8 treesize of output 1 [2021-08-12 19:12:32,621 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,625 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 7 treesize of output 1 [2021-08-12 19:12:32,626 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,630 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,634 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 8 treesize of output 1 [2021-08-12 19:12:32,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,638 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,642 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 10 treesize of output 1 [2021-08-12 19:12:32,642 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:32,646 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 10 treesize of output 1 [2021-08-12 19:12:32,647 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:32,650 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,767 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-08-12 19:12:32,768 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-08-12 19:12:32,771 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 4 treesize of output 2 [2021-08-12 19:12:32,771 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,774 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 3 treesize of output 1 [2021-08-12 19:12:32,775 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,777 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 5 treesize of output 1 [2021-08-12 19:12:32,778 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,780 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 3 treesize of output 1 [2021-08-12 19:12:32,781 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,783 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 4 treesize of output 2 [2021-08-12 19:12:32,784 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:32,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:32,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:12:32,829 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-08-12 19:12:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:32,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739246957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:32,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:32,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:32,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916390889] [2021-08-12 19:12:32,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:32,938 INFO L87 Difference]: Start difference. First operand 645 states and 2184 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:33,669 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-08-12 19:12:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:34,537 INFO L93 Difference]: Finished difference Result 817 states and 2660 transitions. [2021-08-12 19:12:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:12:34,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:34,540 INFO L225 Difference]: With dead ends: 817 [2021-08-12 19:12:34,540 INFO L226 Difference]: Without dead ends: 800 [2021-08-12 19:12:34,541 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 933.3ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:12:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-12 19:12:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 648. [2021-08-12 19:12:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.3879443585780527) internal successors, (2192), 647 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2192 transitions. [2021-08-12 19:12:34,729 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2192 transitions. Word has length 20 [2021-08-12 19:12:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:34,729 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 2192 transitions. [2021-08-12 19:12:34,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2192 transitions. [2021-08-12 19:12:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:34,730 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:34,730 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:34,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-08-12 19:12:34,931 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1783372094, now seen corresponding path program 29 times [2021-08-12 19:12:34,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:34,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342065369] [2021-08-12 19:12:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:35,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342065369] [2021-08-12 19:12:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342065369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276000018] [2021-08-12 19:12:35,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:35,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:12:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:12:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:35,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276000018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:35,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:35,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:12:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833117376] [2021-08-12 19:12:35,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:12:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:12:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:12:35,626 INFO L87 Difference]: Start difference. First operand 648 states and 2192 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:12:36,302 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-08-12 19:12:36,773 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-08-12 19:12:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:37,582 INFO L93 Difference]: Finished difference Result 863 states and 2758 transitions. [2021-08-12 19:12:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:12:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:12:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:37,584 INFO L225 Difference]: With dead ends: 863 [2021-08-12 19:12:37,585 INFO L226 Difference]: Without dead ends: 846 [2021-08-12 19:12:37,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:12:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-12 19:12:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 637. [2021-08-12 19:12:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.3789308176100628) internal successors, (2149), 636 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2149 transitions. [2021-08-12 19:12:37,781 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2149 transitions. Word has length 20 [2021-08-12 19:12:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2149 transitions. [2021-08-12 19:12:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:12:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2149 transitions. [2021-08-12 19:12:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:37,782 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:37,782 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:37,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1822,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:37,997 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 889417086, now seen corresponding path program 30 times [2021-08-12 19:12:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:37,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878055542] [2021-08-12 19:12:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:38,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:38,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878055542] [2021-08-12 19:12:38,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878055542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:38,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540858922] [2021-08-12 19:12:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:38,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:12:38,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:38,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:38,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:38,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:38,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:38,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:38,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:38,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:38,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:39,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,011 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 7 treesize of output 1 [2021-08-12 19:12:39,012 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,016 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 7 treesize of output 1 [2021-08-12 19:12:39,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,020 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,024 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 8 treesize of output 1 [2021-08-12 19:12:39,024 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,028 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,036 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 8 treesize of output 1 [2021-08-12 19:12:39,036 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,040 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 10 treesize of output 1 [2021-08-12 19:12:39,041 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,044 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,048 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 9 treesize of output 1 [2021-08-12 19:12:39,049 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,053 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 10 treesize of output 1 [2021-08-12 19:12:39,053 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,057 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 10 treesize of output 1 [2021-08-12 19:12:39,058 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:39,061 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 9 treesize of output 2 [2021-08-12 19:12:39,062 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:39,065 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,175 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-08-12 19:12:39,175 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-08-12 19:12:39,178 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 4 treesize of output 2 [2021-08-12 19:12:39,180 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,184 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 3 treesize of output 1 [2021-08-12 19:12:39,185 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,187 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 5 treesize of output 1 [2021-08-12 19:12:39,188 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,191 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 4 treesize of output 2 [2021-08-12 19:12:39,192 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,194 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 3 treesize of output 1 [2021-08-12 19:12:39,195 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:39,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:39,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:12:39,242 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:761, output treesize:89 [2021-08-12 19:12:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540858922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735637000] [2021-08-12 19:12:39,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:39,362 INFO L87 Difference]: Start difference. First operand 637 states and 2149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:40,312 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-08-12 19:12:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:41,546 INFO L93 Difference]: Finished difference Result 856 states and 2753 transitions. [2021-08-12 19:12:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:12:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:41,548 INFO L225 Difference]: With dead ends: 856 [2021-08-12 19:12:41,548 INFO L226 Difference]: Without dead ends: 839 [2021-08-12 19:12:41,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1373.0ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:12:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-08-12 19:12:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 637. [2021-08-12 19:12:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.3789308176100628) internal successors, (2149), 636 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2149 transitions. [2021-08-12 19:12:41,745 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2149 transitions. Word has length 20 [2021-08-12 19:12:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:41,745 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2149 transitions. [2021-08-12 19:12:41,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2149 transitions. [2021-08-12 19:12:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:41,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:41,747 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:41,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-08-12 19:12:41,954 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash 48224212, now seen corresponding path program 31 times [2021-08-12 19:12:41,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:41,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086959009] [2021-08-12 19:12:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:42,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:42,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086959009] [2021-08-12 19:12:42,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086959009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:42,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171503477] [2021-08-12 19:12:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:12:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:42,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,637 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 10 treesize of output 1 [2021-08-12 19:12:42,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:42,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,650 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 10 treesize of output 1 [2021-08-12 19:12:42,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,654 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 7 treesize of output 1 [2021-08-12 19:12:42,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,660 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 8 treesize of output 1 [2021-08-12 19:12:42,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-08-12 19:12:42,670 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,675 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 9 treesize of output 2 [2021-08-12 19:12:42,676 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,680 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 9 treesize of output 2 [2021-08-12 19:12:42,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,686 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 7 treesize of output 1 [2021-08-12 19:12:42,687 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,692 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 8 treesize of output 1 [2021-08-12 19:12:42,693 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,698 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 10 treesize of output 1 [2021-08-12 19:12:42,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,703 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 9 treesize of output 1 [2021-08-12 19:12:42,705 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,710 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 10 treesize of output 1 [2021-08-12 19:12:42,710 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:42,715 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,720 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 8 treesize of output 1 [2021-08-12 19:12:42,720 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:42,725 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,729 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 8 treesize of output 1 [2021-08-12 19:12:42,730 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,734 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 10 treesize of output 1 [2021-08-12 19:12:42,735 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:42,748 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:42,751 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 10 treesize of output 1 [2021-08-12 19:12:42,752 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:42,881 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-08-12 19:12:42,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:42,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:12:42,886 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:785, output treesize:308 [2021-08-12 19:12:43,127 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-08-12 19:12:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:44,144 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 9 treesize of output 1 [2021-08-12 19:12:44,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,330 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2021-08-12 19:12:44,330 INFO L628 ElimStorePlain]: treesize reduction 223, result has 44.7 percent of original size [2021-08-12 19:12:44,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-08-12 19:12:44,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-08-12 19:12:44,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-08-12 19:12:44,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-08-12 19:12:44,334 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 4 treesize of output 2 [2021-08-12 19:12:44,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:44,412 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 3 treesize of output 1 [2021-08-12 19:12:44,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:44,488 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 3 treesize of output 1 [2021-08-12 19:12:44,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:44,563 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 6 treesize of output 2 [2021-08-12 19:12:44,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:44,637 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 6 treesize of output 2 [2021-08-12 19:12:44,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:44,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:44,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:12:44,708 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 15 variables, input treesize:411, output treesize:134 [2021-08-12 19:12:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:44,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171503477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:44,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:12:44,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:12:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807644475] [2021-08-12 19:12:44,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:12:44,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:12:44,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:12:44,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:12:44,928 INFO L87 Difference]: Start difference. First operand 637 states and 2149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:45,588 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-08-12 19:12:46,018 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-08-12 19:12:46,450 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-08-12 19:12:46,832 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-08-12 19:12:47,251 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-08-12 19:12:47,716 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-08-12 19:12:48,212 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-08-12 19:12:48,535 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-08-12 19:12:49,024 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-08-12 19:12:49,292 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-08-12 19:12:49,615 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 89 [2021-08-12 19:12:50,287 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-08-12 19:12:50,638 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2021-08-12 19:12:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:12:51,408 INFO L93 Difference]: Finished difference Result 1168 states and 3614 transitions. [2021-08-12 19:12:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 19:12:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:12:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:12:51,410 INFO L225 Difference]: With dead ends: 1168 [2021-08-12 19:12:51,410 INFO L226 Difference]: Without dead ends: 1091 [2021-08-12 19:12:51,411 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 5131.4ms TimeCoverageRelationStatistics Valid=325, Invalid=1235, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:12:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-08-12 19:12:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 664. [2021-08-12 19:12:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.396681749622926) internal successors, (2252), 663 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:12:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2252 transitions. [2021-08-12 19:12:51,629 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2252 transitions. Word has length 20 [2021-08-12 19:12:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:12:51,630 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2252 transitions. [2021-08-12 19:12:51,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:12:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2252 transitions. [2021-08-12 19:12:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:12:51,631 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:12:51,631 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:12:51,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:51,831 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:12:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:12:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1926175282, now seen corresponding path program 32 times [2021-08-12 19:12:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:12:51,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452738445] [2021-08-12 19:12:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:12:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:12:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:12:52,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:12:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452738445] [2021-08-12 19:12:52,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452738445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:12:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540994807] [2021-08-12 19:12:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:12:52,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:12:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:12:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:12:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:12:52,504 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_46, v_prenex_47, ends_with_2, v_prenex_45, v_prenex_48, v_prenex_49], 6=[v_prenex_50, v_prenex_53, v_prenex_51]} [2021-08-12 19:12:52,512 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 5 treesize of output 1 [2021-08-12 19:12:52,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:53,164 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 133 [2021-08-12 19:12:53,164 INFO L628 ElimStorePlain]: treesize reduction 428, result has 61.9 percent of original size [2021-08-12 19:12:53,171 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 6 treesize of output 2 [2021-08-12 19:12:53,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:53,436 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-08-12 19:12:53,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:53,442 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 6 treesize of output 2 [2021-08-12 19:12:53,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:53,703 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-08-12 19:12:53,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:53,709 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 4 treesize of output 2 [2021-08-12 19:12:53,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:53,971 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-08-12 19:12:53,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:53,977 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 6 treesize of output 2 [2021-08-12 19:12:53,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:54,490 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2021-08-12 19:12:54,490 INFO L628 ElimStorePlain]: treesize reduction 42, result has 93.8 percent of original size [2021-08-12 19:12:54,495 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 3 treesize of output 1 [2021-08-12 19:12:54,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:54,746 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-08-12 19:12:54,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:54,753 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 6 treesize of output 2 [2021-08-12 19:12:54,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:54,759 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 6 treesize of output 2 [2021-08-12 19:12:54,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:54,764 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 6 treesize of output 2 [2021-08-12 19:12:54,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:54,770 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 6 treesize of output 2 [2021-08-12 19:12:54,771 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,006 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 19:12:55,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:55,012 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 6 treesize of output 2 [2021-08-12 19:12:55,013 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,018 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 6 treesize of output 2 [2021-08-12 19:12:55,019 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,024 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 4 treesize of output 2 [2021-08-12 19:12:55,025 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,030 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 6 treesize of output 2 [2021-08-12 19:12:55,031 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,259 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:12:55,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:55,264 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 5 treesize of output 1 [2021-08-12 19:12:55,265 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,269 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 3 treesize of output 1 [2021-08-12 19:12:55,270 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:55,488 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-08-12 19:12:55,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:55,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 9 dim-1 vars, End of recursive call: 11 dim-0 vars, and 15 xjuncts. [2021-08-12 19:12:55,503 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:1127, output treesize:573 [2021-08-12 19:12:55,812 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 121 [2021-08-12 19:12:56,011 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-08-12 19:12:57,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:57,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:57,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:57,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:57,134 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 10 treesize of output 1 [2021-08-12 19:12:57,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:12:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:12:57,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:12:57,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,624 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 131 [2021-08-12 19:12:57,624 INFO L628 ElimStorePlain]: treesize reduction 1199, result has 23.7 percent of original size [2021-08-12 19:12:57,631 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 3 treesize of output 1 [2021-08-12 19:12:57,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,777 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 19:12:57,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:57,783 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 4 treesize of output 2 [2021-08-12 19:12:57,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:57,934 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-08-12 19:12:57,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:57,941 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 5 treesize of output 1 [2021-08-12 19:12:57,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,087 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-08-12 19:12:58,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,094 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 4 treesize of output 2 [2021-08-12 19:12:58,095 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,235 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-08-12 19:12:58,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,241 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 4 treesize of output 2 [2021-08-12 19:12:58,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,387 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-08-12 19:12:58,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,395 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 5 treesize of output 1 [2021-08-12 19:12:58,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,402 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 5 treesize of output 1 [2021-08-12 19:12:58,403 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,545 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-08-12 19:12:58,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,555 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 3 treesize of output 1 [2021-08-12 19:12:58,556 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,694 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 19:12:58,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,700 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 4 treesize of output 2 [2021-08-12 19:12:58,701 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,841 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 19:12:58,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,847 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 3 treesize of output 1 [2021-08-12 19:12:58,848 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:58,980 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 19:12:58,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:58,986 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 6 treesize of output 2 [2021-08-12 19:12:58,987 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:59,116 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-08-12 19:12:59,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:59,122 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 3 treesize of output 1 [2021-08-12 19:12:59,122 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:59,251 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-08-12 19:12:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:59,257 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 4 treesize of output 2 [2021-08-12 19:12:59,258 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:59,395 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-08-12 19:12:59,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:59,399 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 4 treesize of output 2 [2021-08-12 19:12:59,400 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:12:59,525 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:12:59,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:12:59,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-08-12 19:12:59,530 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 22 variables, input treesize:1788, output treesize:249 [2021-08-12 19:12:59,714 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 19:13:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:00,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540994807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:00,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:00,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:00,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26160922] [2021-08-12 19:13:00,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:00,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:00,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:00,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:00,030 INFO L87 Difference]: Start difference. First operand 664 states and 2252 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:00,314 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2021-08-12 19:13:00,654 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2021-08-12 19:13:01,062 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-08-12 19:13:01,763 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2021-08-12 19:13:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:02,727 INFO L93 Difference]: Finished difference Result 914 states and 2905 transitions. [2021-08-12 19:13:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:13:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:02,730 INFO L225 Difference]: With dead ends: 914 [2021-08-12 19:13:02,730 INFO L226 Difference]: Without dead ends: 897 [2021-08-12 19:13:02,730 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2254.4ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:13:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-08-12 19:13:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 666. [2021-08-12 19:13:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.38796992481203) internal successors, (2253), 665 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2253 transitions. [2021-08-12 19:13:02,951 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2253 transitions. Word has length 20 [2021-08-12 19:13:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:02,952 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2253 transitions. [2021-08-12 19:13:02,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2253 transitions. [2021-08-12 19:13:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:02,953 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:02,953 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:03,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2326 [2021-08-12 19:13:03,153 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1839884244, now seen corresponding path program 33 times [2021-08-12 19:13:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:03,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266241753] [2021-08-12 19:13:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:03,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:03,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266241753] [2021-08-12 19:13:03,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266241753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:03,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359323699] [2021-08-12 19:13:03,339 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 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 [2021-08-12 19:13:03,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:13:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:13:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,618 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 9 treesize of output 2 [2021-08-12 19:13:03,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:03,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:03,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,634 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 7 treesize of output 1 [2021-08-12 19:13:03,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,638 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 5 treesize of output 1 [2021-08-12 19:13:03,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,643 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 8 treesize of output 1 [2021-08-12 19:13:03,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,648 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 10 treesize of output 1 [2021-08-12 19:13:03,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,652 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 3 treesize of output 1 [2021-08-12 19:13:03,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:03,656 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:03,660 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,664 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 9 treesize of output 1 [2021-08-12 19:13:03,664 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,668 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 8 treesize of output 1 [2021-08-12 19:13:03,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,673 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 10 treesize of output 1 [2021-08-12 19:13:03,673 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,677 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 9 treesize of output 2 [2021-08-12 19:13:03,678 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,682 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 8 treesize of output 1 [2021-08-12 19:13:03,682 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:03,686 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 10 treesize of output 1 [2021-08-12 19:13:03,686 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:03,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:03,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-08-12 19:13:03,780 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:565, output treesize:225 [2021-08-12 19:13:03,977 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-08-12 19:13:04,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:04,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:04,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:04,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:04,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:04,677 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-08-12 19:13:04,677 INFO L628 ElimStorePlain]: treesize reduction 85, result has 65.2 percent of original size [2021-08-12 19:13:04,680 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 5 treesize of output 1 [2021-08-12 19:13:04,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:04,782 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-08-12 19:13:04,782 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.1 percent of original size [2021-08-12 19:13:04,785 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 5 treesize of output 1 [2021-08-12 19:13:04,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:04,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:04,835 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 4 treesize of output 2 [2021-08-12 19:13:04,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:04,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:04,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:13:04,882 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:287, output treesize:119 [2021-08-12 19:13:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359323699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:05,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:05,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291990567] [2021-08-12 19:13:05,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:05,093 INFO L87 Difference]: Start difference. First operand 666 states and 2253 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:05,600 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-08-12 19:13:06,027 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2021-08-12 19:13:06,356 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-08-12 19:13:06,799 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-08-12 19:13:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:07,829 INFO L93 Difference]: Finished difference Result 881 states and 2827 transitions. [2021-08-12 19:13:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:13:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:07,831 INFO L225 Difference]: With dead ends: 881 [2021-08-12 19:13:07,831 INFO L226 Difference]: Without dead ends: 864 [2021-08-12 19:13:07,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1895.9ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:13:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-08-12 19:13:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 673. [2021-08-12 19:13:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3898809523809526) internal successors, (2278), 672 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2278 transitions. [2021-08-12 19:13:08,072 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2278 transitions. Word has length 20 [2021-08-12 19:13:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:08,072 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2278 transitions. [2021-08-12 19:13:08,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2278 transitions. [2021-08-12 19:13:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:08,076 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:08,077 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:08,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2801 [2021-08-12 19:13:08,277 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1540001564, now seen corresponding path program 34 times [2021-08-12 19:13:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126728691] [2021-08-12 19:13:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:08,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126728691] [2021-08-12 19:13:08,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126728691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671218861] [2021-08-12 19:13:08,452 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 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 [2021-08-12 19:13:08,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:13:08,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:13:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:08,874 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_83, v_prenex_85], 15=[ends_with_2]} [2021-08-12 19:13:08,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,881 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 9 treesize of output 1 [2021-08-12 19:13:08,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,888 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 8 treesize of output 1 [2021-08-12 19:13:08,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:08,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,894 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 7 treesize of output 1 [2021-08-12 19:13:08,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:08,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:08,901 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 10 treesize of output 1 [2021-08-12 19:13:08,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,237 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 99 [2021-08-12 19:13:09,238 INFO L628 ElimStorePlain]: treesize reduction 332, result has 51.2 percent of original size [2021-08-12 19:13:09,242 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 5 treesize of output 1 [2021-08-12 19:13:09,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,250 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 5 treesize of output 1 [2021-08-12 19:13:09,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,402 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:13:09,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:09,407 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 4 treesize of output 2 [2021-08-12 19:13:09,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,413 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 4 treesize of output 2 [2021-08-12 19:13:09,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,418 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 4 treesize of output 2 [2021-08-12 19:13:09,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,423 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 6 treesize of output 2 [2021-08-12 19:13:09,423 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:09,571 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-08-12 19:13:09,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:09,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-08-12 19:13:09,581 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:789, output treesize:321 [2021-08-12 19:13:09,740 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-08-12 19:13:10,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:10,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:10,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:10,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:10,867 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 9 treesize of output 1 [2021-08-12 19:13:10,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:10,874 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 10 treesize of output 1 [2021-08-12 19:13:10,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,196 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2021-08-12 19:13:11,197 INFO L628 ElimStorePlain]: treesize reduction 783, result has 23.6 percent of original size [2021-08-12 19:13:11,202 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 5 treesize of output 1 [2021-08-12 19:13:11,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,305 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-08-12 19:13:11,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,310 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 4 treesize of output 2 [2021-08-12 19:13:11,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,415 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-08-12 19:13:11,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,420 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 3 treesize of output 1 [2021-08-12 19:13:11,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,533 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 6 treesize of output 2 [2021-08-12 19:13:11,534 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,634 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-08-12 19:13:11,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,639 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 4 treesize of output 2 [2021-08-12 19:13:11,640 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,739 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 3 treesize of output 1 [2021-08-12 19:13:11,740 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,837 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 6 treesize of output 2 [2021-08-12 19:13:11,838 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:11,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:11,933 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 4 treesize of output 2 [2021-08-12 19:13:11,934 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:12,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:12,033 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 3 treesize of output 1 [2021-08-12 19:13:12,034 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:12,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:12,124 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 3 treesize of output 1 [2021-08-12 19:13:12,125 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:12,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:12,218 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 3 treesize of output 1 [2021-08-12 19:13:12,219 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:12,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:12,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:13:12,309 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 17 variables, input treesize:1169, output treesize:156 [2021-08-12 19:13:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:12,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671218861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:12,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:12,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965686740] [2021-08-12 19:13:12,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:12,600 INFO L87 Difference]: Start difference. First operand 673 states and 2278 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:13,026 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2021-08-12 19:13:13,481 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-08-12 19:13:14,128 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 120 [2021-08-12 19:13:14,765 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 94 [2021-08-12 19:13:15,076 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 114 [2021-08-12 19:13:15,674 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 91 [2021-08-12 19:13:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:16,575 INFO L93 Difference]: Finished difference Result 982 states and 3099 transitions. [2021-08-12 19:13:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:13:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:16,577 INFO L225 Difference]: With dead ends: 982 [2021-08-12 19:13:16,577 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 19:13:16,578 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2636.8ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:13:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 19:13:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 673. [2021-08-12 19:13:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3898809523809526) internal successors, (2278), 672 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2278 transitions. [2021-08-12 19:13:16,836 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2278 transitions. Word has length 20 [2021-08-12 19:13:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:16,836 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2278 transitions. [2021-08-12 19:13:16,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2278 transitions. [2021-08-12 19:13:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:16,837 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:16,837 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:17,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:17,045 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 35 times [2021-08-12 19:13:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:17,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166864580] [2021-08-12 19:13:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:17,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:17,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166864580] [2021-08-12 19:13:17,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166864580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:17,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300821026] [2021-08-12 19:13:17,333 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 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 [2021-08-12 19:13:17,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:13:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:13:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:17,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300821026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:17,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:17,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:13:17,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993617892] [2021-08-12 19:13:17,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:13:17,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:13:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:13:17,818 INFO L87 Difference]: Start difference. First operand 673 states and 2278 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:13:19,425 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-08-12 19:13:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:20,476 INFO L93 Difference]: Finished difference Result 900 states and 2888 transitions. [2021-08-12 19:13:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:13:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:13:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:20,479 INFO L225 Difference]: With dead ends: 900 [2021-08-12 19:13:20,479 INFO L226 Difference]: Without dead ends: 853 [2021-08-12 19:13:20,479 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1569.8ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:13:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-12 19:13:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 676. [2021-08-12 19:13:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.388148148148148) internal successors, (2287), 675 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2287 transitions. [2021-08-12 19:13:20,757 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2287 transitions. Word has length 20 [2021-08-12 19:13:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:20,757 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2287 transitions. [2021-08-12 19:13:20,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:13:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2287 transitions. [2021-08-12 19:13:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:20,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:20,758 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:20,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:20,959 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 36 times [2021-08-12 19:13:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:20,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650339317] [2021-08-12 19:13:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:21,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650339317] [2021-08-12 19:13:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650339317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989114193] [2021-08-12 19:13:21,148 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 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 [2021-08-12 19:13:21,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:13:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:13:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:21,848 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 8 treesize of output 1 [2021-08-12 19:13:21,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:21,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:21,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:21,853 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 8 treesize of output 1 [2021-08-12 19:13:21,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:21,860 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 3 treesize of output 1 [2021-08-12 19:13:21,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:21,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:21,866 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 7 treesize of output 1 [2021-08-12 19:13:21,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:22,137 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-08-12 19:13:22,138 INFO L628 ElimStorePlain]: treesize reduction 172, result has 62.9 percent of original size [2021-08-12 19:13:22,141 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 6 treesize of output 2 [2021-08-12 19:13:22,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:22,145 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 6 treesize of output 2 [2021-08-12 19:13:22,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:22,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-08-12 19:13:22,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:22,273 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 4 treesize of output 2 [2021-08-12 19:13:22,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:22,278 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 4 treesize of output 2 [2021-08-12 19:13:22,278 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:22,392 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-08-12 19:13:22,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:22,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 9 xjuncts. [2021-08-12 19:13:22,396 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:551, output treesize:272 [2021-08-12 19:13:22,597 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 19:13:23,720 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_111, v_prenex_121, v_prenex_115, ends_with_6], 10=[v_prenex_110, ends_with_2, v_prenex_114, v_prenex_120]} [2021-08-12 19:13:23,729 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 5 treesize of output 1 [2021-08-12 19:13:23,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,738 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 5 treesize of output 1 [2021-08-12 19:13:23,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:23,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:23,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:23,757 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 10 treesize of output 1 [2021-08-12 19:13:23,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,764 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 5 treesize of output 1 [2021-08-12 19:13:23,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:23,774 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 10 treesize of output 1 [2021-08-12 19:13:23,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:23,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:23,782 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 10 treesize of output 1 [2021-08-12 19:13:23,783 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,197 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 104 [2021-08-12 19:13:24,197 INFO L628 ElimStorePlain]: treesize reduction 580, result has 43.1 percent of original size [2021-08-12 19:13:24,203 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 6 treesize of output 2 [2021-08-12 19:13:24,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,208 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 6 treesize of output 2 [2021-08-12 19:13:24,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,394 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 19:13:24,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:24,398 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 3 treesize of output 1 [2021-08-12 19:13:24,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,403 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 3 treesize of output 1 [2021-08-12 19:13:24,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,577 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 19:13:24,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:24,583 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 4 treesize of output 2 [2021-08-12 19:13:24,584 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,589 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 4 treesize of output 2 [2021-08-12 19:13:24,590 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,595 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 4 treesize of output 2 [2021-08-12 19:13:24,595 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,600 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 4 treesize of output 2 [2021-08-12 19:13:24,601 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,606 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 4 treesize of output 2 [2021-08-12 19:13:24,606 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,778 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 19:13:24,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:24,784 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 6 treesize of output 2 [2021-08-12 19:13:24,785 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,789 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 6 treesize of output 2 [2021-08-12 19:13:24,790 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,794 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 6 treesize of output 2 [2021-08-12 19:13:24,795 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,952 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-08-12 19:13:24,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:24,958 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 4 treesize of output 2 [2021-08-12 19:13:24,958 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,962 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 6 treesize of output 2 [2021-08-12 19:13:24,963 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,968 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 4 treesize of output 2 [2021-08-12 19:13:24,968 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,973 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 4 treesize of output 2 [2021-08-12 19:13:24,974 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:24,978 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 4 treesize of output 2 [2021-08-12 19:13:24,979 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:25,279 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-08-12 19:13:25,280 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-08-12 19:13:25,284 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 3 treesize of output 1 [2021-08-12 19:13:25,285 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:25,289 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 3 treesize of output 1 [2021-08-12 19:13:25,290 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:25,435 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 19:13:25,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:25,439 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 5 treesize of output 1 [2021-08-12 19:13:25,440 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:25,444 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 5 treesize of output 1 [2021-08-12 19:13:25,445 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:25,586 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 19:13:25,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:25,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 8 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-08-12 19:13:25,592 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 21 variables, input treesize:1207, output treesize:266 [2021-08-12 19:13:25,756 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-08-12 19:13:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989114193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:25,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:25,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814366641] [2021-08-12 19:13:25,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:25,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:25,928 INFO L87 Difference]: Start difference. First operand 676 states and 2287 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:26,304 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-08-12 19:13:26,454 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-08-12 19:13:26,763 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-08-12 19:13:27,201 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-08-12 19:13:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:27,851 INFO L93 Difference]: Finished difference Result 763 states and 2535 transitions. [2021-08-12 19:13:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:13:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:27,853 INFO L225 Difference]: With dead ends: 763 [2021-08-12 19:13:27,853 INFO L226 Difference]: Without dead ends: 746 [2021-08-12 19:13:27,854 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1697.5ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:13:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-08-12 19:13:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 685. [2021-08-12 19:13:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-08-12 19:13:28,126 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-08-12 19:13:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:28,126 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-08-12 19:13:28,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-08-12 19:13:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:28,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:28,127 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:28,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:28,328 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash 725260138, now seen corresponding path program 37 times [2021-08-12 19:13:28,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:28,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808683649] [2021-08-12 19:13:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:28,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:28,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808683649] [2021-08-12 19:13:28,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808683649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:28,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497045643] [2021-08-12 19:13:28,543 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 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 [2021-08-12 19:13:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:28,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:13:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:29,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,196 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 8 treesize of output 1 [2021-08-12 19:13:29,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:29,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,211 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 10 treesize of output 1 [2021-08-12 19:13:29,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,219 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 9 treesize of output 2 [2021-08-12 19:13:29,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:29,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,735 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2021-08-12 19:13:29,735 INFO L628 ElimStorePlain]: treesize reduction 474, result has 50.6 percent of original size [2021-08-12 19:13:29,740 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 6 treesize of output 2 [2021-08-12 19:13:29,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,746 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 4 treesize of output 2 [2021-08-12 19:13:29,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,751 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 6 treesize of output 2 [2021-08-12 19:13:29,752 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,962 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 19:13:29,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:29,967 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 5 treesize of output 1 [2021-08-12 19:13:29,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:29,972 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 5 treesize of output 1 [2021-08-12 19:13:29,973 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:30,189 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 19:13:30,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:30,195 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 3 treesize of output 1 [2021-08-12 19:13:30,195 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:30,200 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 5 treesize of output 1 [2021-08-12 19:13:30,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:30,416 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-08-12 19:13:30,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:30,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:13:30,428 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:1095, output treesize:451 [2021-08-12 19:13:30,764 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 129 [2021-08-12 19:13:31,155 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 89 [2021-08-12 19:13:32,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:32,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:32,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:32,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:32,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,585 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 97 [2021-08-12 19:13:32,585 INFO L628 ElimStorePlain]: treesize reduction 823, result has 22.5 percent of original size [2021-08-12 19:13:32,590 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 3 treesize of output 1 [2021-08-12 19:13:32,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,697 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 19:13:32,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:32,697 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-08-12 19:13:32,697 INFO L518 ElimStorePlain]: Eliminatee v_prenex_165 vanished before elimination [2021-08-12 19:13:32,702 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 5 treesize of output 1 [2021-08-12 19:13:32,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:32,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-08-12 19:13:32,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-08-12 19:13:32,806 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 3 treesize of output 1 [2021-08-12 19:13:32,807 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:32,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:32,908 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 5 treesize of output 1 [2021-08-12 19:13:32,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,010 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 4 treesize of output 2 [2021-08-12 19:13:33,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-08-12 19:13:33,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-08-12 19:13:33,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-08-12 19:13:33,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-08-12 19:13:33,108 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 4 treesize of output 2 [2021-08-12 19:13:33,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,205 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-08-12 19:13:33,205 INFO L518 ElimStorePlain]: Eliminatee v_prenex_140 vanished before elimination [2021-08-12 19:13:33,210 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 3 treesize of output 1 [2021-08-12 19:13:33,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,302 INFO L518 ElimStorePlain]: Eliminatee v_prenex_150 vanished before elimination [2021-08-12 19:13:33,307 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 6 treesize of output 2 [2021-08-12 19:13:33,307 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,395 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-08-12 19:13:33,399 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 3 treesize of output 1 [2021-08-12 19:13:33,399 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,491 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 4 treesize of output 2 [2021-08-12 19:13:33,492 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,580 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 3 treesize of output 1 [2021-08-12 19:13:33,581 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:33,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:33,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 24 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:13:33,668 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 34 variables, input treesize:1169, output treesize:163 [2021-08-12 19:13:33,820 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-08-12 19:13:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497045643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330524369] [2021-08-12 19:13:33,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:33,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:33,967 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:34,306 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-08-12 19:13:34,989 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 130 [2021-08-12 19:13:35,801 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-08-12 19:13:36,005 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-08-12 19:13:36,455 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-08-12 19:13:36,615 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-08-12 19:13:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:37,119 INFO L93 Difference]: Finished difference Result 879 states and 2854 transitions. [2021-08-12 19:13:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:13:37,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:37,122 INFO L225 Difference]: With dead ends: 879 [2021-08-12 19:13:37,122 INFO L226 Difference]: Without dead ends: 847 [2021-08-12 19:13:37,122 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2527.8ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:13:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-08-12 19:13:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 686. [2021-08-12 19:13:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3854014598540147) internal successors, (2319), 685 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2319 transitions. [2021-08-12 19:13:37,406 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2319 transitions. Word has length 20 [2021-08-12 19:13:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:37,406 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2319 transitions. [2021-08-12 19:13:37,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2319 transitions. [2021-08-12 19:13:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:37,407 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:37,407 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:37,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:37,621 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1910342118, now seen corresponding path program 38 times [2021-08-12 19:13:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:37,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834209685] [2021-08-12 19:13:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:37,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:37,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834209685] [2021-08-12 19:13:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834209685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:37,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170676879] [2021-08-12 19:13:37,848 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 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 [2021-08-12 19:13:37,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:13:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:13:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:38,454 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2, v_prenex_169], 10=[v_prenex_172]} [2021-08-12 19:13:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:38,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:38,462 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 7 treesize of output 1 [2021-08-12 19:13:38,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:38,469 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 3 treesize of output 1 [2021-08-12 19:13:38,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:38,477 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 10 treesize of output 1 [2021-08-12 19:13:38,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:38,483 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 8 treesize of output 1 [2021-08-12 19:13:38,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:38,923 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2021-08-12 19:13:38,924 INFO L628 ElimStorePlain]: treesize reduction 237, result has 66.3 percent of original size [2021-08-12 19:13:38,929 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 5 treesize of output 1 [2021-08-12 19:13:38,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:38,934 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 3 treesize of output 1 [2021-08-12 19:13:38,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,134 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 19:13:39,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:39,140 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 6 treesize of output 2 [2021-08-12 19:13:39,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,145 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 6 treesize of output 2 [2021-08-12 19:13:39,146 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,150 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 6 treesize of output 2 [2021-08-12 19:13:39,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,156 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 4 treesize of output 2 [2021-08-12 19:13:39,157 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,161 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 4 treesize of output 2 [2021-08-12 19:13:39,162 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,167 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 4 treesize of output 2 [2021-08-12 19:13:39,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:39,357 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-08-12 19:13:39,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:39,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:13:39,370 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:809, output treesize:429 [2021-08-12 19:13:39,683 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 125 [2021-08-12 19:13:41,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:41,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:41,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:41,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:41,171 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 9 treesize of output 2 [2021-08-12 19:13:41,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:41,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,751 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 133 [2021-08-12 19:13:41,752 INFO L628 ElimStorePlain]: treesize reduction 1538, result has 19.6 percent of original size [2021-08-12 19:13:41,758 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 3 treesize of output 1 [2021-08-12 19:13:41,759 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:41,914 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-08-12 19:13:41,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:41,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-08-12 19:13:41,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-08-12 19:13:41,920 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 6 treesize of output 2 [2021-08-12 19:13:41,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,071 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-08-12 19:13:42,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_203 vanished before elimination [2021-08-12 19:13:42,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-08-12 19:13:42,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_205 vanished before elimination [2021-08-12 19:13:42,078 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 5 treesize of output 1 [2021-08-12 19:13:42,078 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,238 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-08-12 19:13:42,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,245 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 4 treesize of output 2 [2021-08-12 19:13:42,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,396 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 19:13:42,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,402 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 4 treesize of output 2 [2021-08-12 19:13:42,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,551 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-08-12 19:13:42,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,558 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 6 treesize of output 2 [2021-08-12 19:13:42,559 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,703 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-08-12 19:13:42,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,709 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 3 treesize of output 1 [2021-08-12 19:13:42,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:42,852 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 19:13:42,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:42,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_186 vanished before elimination [2021-08-12 19:13:42,858 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 3 treesize of output 1 [2021-08-12 19:13:42,859 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,001 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 19:13:43,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,001 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-08-12 19:13:43,001 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-08-12 19:13:43,007 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 6 treesize of output 2 [2021-08-12 19:13:43,008 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,145 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:13:43,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,156 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 6 treesize of output 2 [2021-08-12 19:13:43,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,303 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 19:13:43,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,308 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 3 treesize of output 1 [2021-08-12 19:13:43,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,444 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:13:43,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,445 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-08-12 19:13:43,445 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-08-12 19:13:43,450 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 3 treesize of output 1 [2021-08-12 19:13:43,451 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,582 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-08-12 19:13:43,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,592 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 4 treesize of output 2 [2021-08-12 19:13:43,594 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,723 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-08-12 19:13:43,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_192 vanished before elimination [2021-08-12 19:13:43,728 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 5 treesize of output 1 [2021-08-12 19:13:43,729 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:43,853 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:13:43,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:43,854 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-08-12 19:13:43,854 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-08-12 19:13:43,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 28 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-08-12 19:13:43,858 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 44 variables, input treesize:2125, output treesize:249 [2021-08-12 19:13:44,035 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 19:13:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:44,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170676879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:44,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:44,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693575934] [2021-08-12 19:13:44,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:44,305 INFO L87 Difference]: Start difference. First operand 686 states and 2319 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:44,751 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2021-08-12 19:13:45,041 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2021-08-12 19:13:45,634 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-08-12 19:13:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:46,477 INFO L93 Difference]: Finished difference Result 827 states and 2717 transitions. [2021-08-12 19:13:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:13:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:46,480 INFO L225 Difference]: With dead ends: 827 [2021-08-12 19:13:46,480 INFO L226 Difference]: Without dead ends: 810 [2021-08-12 19:13:46,480 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1717.1ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:13:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-08-12 19:13:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 685. [2021-08-12 19:13:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-08-12 19:13:46,764 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-08-12 19:13:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:46,764 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-08-12 19:13:46,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-08-12 19:13:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:46,765 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:46,765 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:46,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:46,966 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1980452154, now seen corresponding path program 39 times [2021-08-12 19:13:46,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:46,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001461737] [2021-08-12 19:13:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:47,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001461737] [2021-08-12 19:13:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001461737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123922718] [2021-08-12 19:13:47,301 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 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 [2021-08-12 19:13:47,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:13:47,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:13:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:48,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,256 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 9 treesize of output 2 [2021-08-12 19:13:48,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,272 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 5 treesize of output 1 [2021-08-12 19:13:48,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,278 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 10 treesize of output 1 [2021-08-12 19:13:48,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,284 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 3 treesize of output 1 [2021-08-12 19:13:48,285 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,290 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 8 treesize of output 1 [2021-08-12 19:13:48,291 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,296 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 6 treesize of output 2 [2021-08-12 19:13:48,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,302 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 7 treesize of output 1 [2021-08-12 19:13:48,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:48,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,314 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,318 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 6 treesize of output 2 [2021-08-12 19:13:48,319 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,324 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,328 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,333 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,338 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,342 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 8 treesize of output 1 [2021-08-12 19:13:48,343 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,347 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,352 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,356 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,360 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 5 treesize of output 1 [2021-08-12 19:13:48,361 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:48,367 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,371 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,375 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 5 treesize of output 1 [2021-08-12 19:13:48,376 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,380 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:48,385 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,389 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,393 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:13:48,398 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,403 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 10 treesize of output 1 [2021-08-12 19:13:48,403 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:48,408 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 10 treesize of output 1 [2021-08-12 19:13:48,408 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,412 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,416 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:48,420 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,635 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-08-12 19:13:48,636 INFO L628 ElimStorePlain]: treesize reduction 165, result has 59.4 percent of original size [2021-08-12 19:13:48,640 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 5 treesize of output 1 [2021-08-12 19:13:48,640 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,643 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 6 treesize of output 2 [2021-08-12 19:13:48,644 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,647 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 4 treesize of output 2 [2021-08-12 19:13:48,648 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,651 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 3 treesize of output 1 [2021-08-12 19:13:48,652 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,655 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 4 treesize of output 2 [2021-08-12 19:13:48,656 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,659 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 5 treesize of output 1 [2021-08-12 19:13:48,659 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,662 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 4 treesize of output 2 [2021-08-12 19:13:48,663 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,666 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 3 treesize of output 1 [2021-08-12 19:13:48,666 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:48,833 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-08-12 19:13:48,833 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.1 percent of original size [2021-08-12 19:13:48,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:13:48,836 INFO L247 ElimStorePlain]: Needed 44 recursive calls to eliminate 3 variables, input treesize:1420, output treesize:179 [2021-08-12 19:13:48,979 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-08-12 19:13:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:49,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123922718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:49,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:49,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:49,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831637610] [2021-08-12 19:13:49,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:49,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:49,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:49,215 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:49,759 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-08-12 19:13:50,307 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-08-12 19:13:50,524 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-08-12 19:13:50,720 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-08-12 19:13:50,946 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-08-12 19:13:51,287 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-08-12 19:13:51,952 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-08-12 19:13:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:53,167 INFO L93 Difference]: Finished difference Result 989 states and 3184 transitions. [2021-08-12 19:13:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:13:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:13:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:53,170 INFO L225 Difference]: With dead ends: 989 [2021-08-12 19:13:53,170 INFO L226 Difference]: Without dead ends: 972 [2021-08-12 19:13:53,170 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2762.3ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:13:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-08-12 19:13:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 685. [2021-08-12 19:13:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.3830409356725144) internal successors, (2314), 684 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2314 transitions. [2021-08-12 19:13:53,474 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2314 transitions. Word has length 20 [2021-08-12 19:13:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:53,474 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2314 transitions. [2021-08-12 19:13:53,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2314 transitions. [2021-08-12 19:13:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:13:53,475 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:53,475 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:53,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4329,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:53,675 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash 456394796, now seen corresponding path program 40 times [2021-08-12 19:13:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:53,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127155518] [2021-08-12 19:13:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:53,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:53,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127155518] [2021-08-12 19:13:53,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127155518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:53,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111911995] [2021-08-12 19:13:53,967 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 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 [2021-08-12 19:13:54,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:13:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:13:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:54,215 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-08-12 19:13:54,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:54,582 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 9 treesize of output 1 [2021-08-12 19:13:54,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,000 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-08-12 19:13:55,001 INFO L628 ElimStorePlain]: treesize reduction 625, result has 36.3 percent of original size [2021-08-12 19:13:55,006 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 3 treesize of output 1 [2021-08-12 19:13:55,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,175 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 19:13:55,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:55,180 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 3 treesize of output 1 [2021-08-12 19:13:55,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,346 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-08-12 19:13:55,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:55,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-08-12 19:13:55,350 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 4 treesize of output 2 [2021-08-12 19:13:55,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,355 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 4 treesize of output 2 [2021-08-12 19:13:55,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,514 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-08-12 19:13:55,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:55,519 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 4 treesize of output 2 [2021-08-12 19:13:55,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,524 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 4 treesize of output 2 [2021-08-12 19:13:55,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,681 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-08-12 19:13:55,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:55,681 INFO L518 ElimStorePlain]: Eliminatee v_prenex_217 vanished before elimination [2021-08-12 19:13:55,685 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 5 treesize of output 1 [2021-08-12 19:13:55,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:55,838 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 19:13:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:55,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-08-12 19:13:55,845 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:989, output treesize:329 [2021-08-12 19:13:56,029 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-08-12 19:13:56,936 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_228], 3=[v_prenex_232], 10=[ends_with_2, v_prenex_225], 15=[v_prenex_229]} [2021-08-12 19:13:56,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:56,944 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 9 treesize of output 2 [2021-08-12 19:13:56,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:56,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:56,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:56,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:56,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:56,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:56,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:56,965 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 8 treesize of output 1 [2021-08-12 19:13:56,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:56,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:56,971 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,183 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 75 [2021-08-12 19:13:57,183 INFO L628 ElimStorePlain]: treesize reduction 553, result has 25.0 percent of original size [2021-08-12 19:13:57,187 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 3 treesize of output 1 [2021-08-12 19:13:57,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,191 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 3 treesize of output 1 [2021-08-12 19:13:57,192 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:57,263 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 4 treesize of output 2 [2021-08-12 19:13:57,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,267 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 3 treesize of output 1 [2021-08-12 19:13:57,268 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:57,336 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 4 treesize of output 2 [2021-08-12 19:13:57,337 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:57,403 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 3 treesize of output 1 [2021-08-12 19:13:57,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,407 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 5 treesize of output 1 [2021-08-12 19:13:57,408 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:57,471 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 6 treesize of output 2 [2021-08-12 19:13:57,472 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,475 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 5 treesize of output 1 [2021-08-12 19:13:57,475 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:57,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:57,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:13:57,543 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 13 variables, input treesize:923, output treesize:106 [2021-08-12 19:13:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111911995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:57,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:57,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:13:57,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840130970] [2021-08-12 19:13:57,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:13:57,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:13:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:57,671 INFO L87 Difference]: Start difference. First operand 685 states and 2314 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:13:58,257 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2021-08-12 19:13:58,700 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-08-12 19:13:59,114 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-08-12 19:13:59,621 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2021-08-12 19:14:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:01,178 INFO L93 Difference]: Finished difference Result 937 states and 2973 transitions. [2021-08-12 19:14:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:14:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:14:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:01,181 INFO L225 Difference]: With dead ends: 937 [2021-08-12 19:14:01,181 INFO L226 Difference]: Without dead ends: 890 [2021-08-12 19:14:01,181 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2514.4ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:14:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-08-12 19:14:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 687. [2021-08-12 19:14:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3877551020408165) internal successors, (2324), 686 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2324 transitions. [2021-08-12 19:14:01,477 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2324 transitions. Word has length 20 [2021-08-12 19:14:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:01,477 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2324 transitions. [2021-08-12 19:14:01,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:14:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2324 transitions. [2021-08-12 19:14:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:01,478 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:01,478 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:01,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4644 [2021-08-12 19:14:01,679 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 399043292, now seen corresponding path program 41 times [2021-08-12 19:14:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:01,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095914969] [2021-08-12 19:14:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:01,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:01,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095914969] [2021-08-12 19:14:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095914969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:01,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759533114] [2021-08-12 19:14:01,864 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 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 [2021-08-12 19:14:01,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:14:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:14:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759533114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:02,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:02,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:14:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099016584] [2021-08-12 19:14:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:14:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:14:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:14:02,276 INFO L87 Difference]: Start difference. First operand 687 states and 2324 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:14:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:04,125 INFO L93 Difference]: Finished difference Result 783 states and 2559 transitions. [2021-08-12 19:14:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:14:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:14:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:04,127 INFO L225 Difference]: With dead ends: 783 [2021-08-12 19:14:04,127 INFO L226 Difference]: Without dead ends: 751 [2021-08-12 19:14:04,127 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:14:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-12 19:14:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 690. [2021-08-12 19:14:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.388969521044993) internal successors, (2335), 689 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2335 transitions. [2021-08-12 19:14:04,424 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2335 transitions. Word has length 20 [2021-08-12 19:14:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:04,425 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 2335 transitions. [2021-08-12 19:14:04,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:14:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2335 transitions. [2021-08-12 19:14:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:04,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:04,426 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:04,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-08-12 19:14:04,641 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1825343152, now seen corresponding path program 42 times [2021-08-12 19:14:04,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:04,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102575024] [2021-08-12 19:14:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:04,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102575024] [2021-08-12 19:14:04,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102575024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330842172] [2021-08-12 19:14:04,997 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 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 [2021-08-12 19:14:05,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:14:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:14:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:05,407 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_2, v_prenex_235], 15=[v_prenex_239]} [2021-08-12 19:14:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,416 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 7 treesize of output 1 [2021-08-12 19:14:05,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,426 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 10 treesize of output 1 [2021-08-12 19:14:05,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,435 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 8 treesize of output 1 [2021-08-12 19:14:05,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:05,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:05,443 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 9 treesize of output 1 [2021-08-12 19:14:05,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:05,980 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 108 [2021-08-12 19:14:05,981 INFO L628 ElimStorePlain]: treesize reduction 494, result has 50.5 percent of original size [2021-08-12 19:14:05,986 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 3 treesize of output 1 [2021-08-12 19:14:05,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:05,991 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 5 treesize of output 1 [2021-08-12 19:14:05,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,232 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:14:06,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:06,238 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 4 treesize of output 2 [2021-08-12 19:14:06,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,244 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 6 treesize of output 2 [2021-08-12 19:14:06,245 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,251 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 6 treesize of output 2 [2021-08-12 19:14:06,252 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,257 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 6 treesize of output 2 [2021-08-12 19:14:06,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,263 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 6 treesize of output 2 [2021-08-12 19:14:06,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,269 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 6 treesize of output 2 [2021-08-12 19:14:06,269 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:06,487 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 19:14:06,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:06,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:14:06,499 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:1117, output treesize:461 [2021-08-12 19:14:06,846 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 131 [2021-08-12 19:14:07,251 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 92 [2021-08-12 19:14:09,429 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_255, v_prenex_262], 15=[v_prenex_265, v_prenex_256, ends_with_10], 21=[ends_with_6]} [2021-08-12 19:14:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:09,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-12 19:14:09,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:09,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:09,451 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 12 treesize of output 1 [2021-08-12 19:14:09,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:09,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:09,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:09,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:09,487 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 13 treesize of output 2 [2021-08-12 19:14:09,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,853 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 102 [2021-08-12 19:14:09,854 INFO L628 ElimStorePlain]: treesize reduction 764, result has 25.8 percent of original size [2021-08-12 19:14:09,859 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 5 treesize of output 1 [2021-08-12 19:14:09,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,864 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 3 treesize of output 1 [2021-08-12 19:14:09,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,976 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 19:14:09,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:09,981 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 3 treesize of output 1 [2021-08-12 19:14:09,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:09,986 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 3 treesize of output 1 [2021-08-12 19:14:09,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,099 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 19:14:10,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:10,104 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 3 treesize of output 1 [2021-08-12 19:14:10,105 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,210 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-08-12 19:14:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:10,215 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 5 treesize of output 1 [2021-08-12 19:14:10,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,220 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 5 treesize of output 1 [2021-08-12 19:14:10,220 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,224 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 4 treesize of output 2 [2021-08-12 19:14:10,225 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:10,325 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 6 treesize of output 2 [2021-08-12 19:14:10,326 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,329 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 4 treesize of output 2 [2021-08-12 19:14:10,330 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,334 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 4 treesize of output 2 [2021-08-12 19:14:10,335 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:10,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:10,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:14:10,433 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 22 variables, input treesize:1321, output treesize:163 [2021-08-12 19:14:10,584 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-08-12 19:14:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:10,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330842172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:10,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:10,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:14:10,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289076165] [2021-08-12 19:14:10,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:14:10,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:14:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:14:10,774 INFO L87 Difference]: Start difference. First operand 690 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:11,596 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 105 [2021-08-12 19:14:12,453 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-08-12 19:14:12,667 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-08-12 19:14:13,121 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-08-12 19:14:13,347 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-08-12 19:14:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:13,912 INFO L93 Difference]: Finished difference Result 879 states and 2848 transitions. [2021-08-12 19:14:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:14:13,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:14:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:13,914 INFO L225 Difference]: With dead ends: 879 [2021-08-12 19:14:13,914 INFO L226 Difference]: Without dead ends: 832 [2021-08-12 19:14:13,915 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2642.0ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:14:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-12 19:14:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 688. [2021-08-12 19:14:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.388646288209607) internal successors, (2328), 687 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2328 transitions. [2021-08-12 19:14:14,218 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2328 transitions. Word has length 20 [2021-08-12 19:14:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:14,218 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2328 transitions. [2021-08-12 19:14:14,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2328 transitions. [2021-08-12 19:14:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:14,219 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:14,219 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:14,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4903 [2021-08-12 19:14:14,420 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash -640261172, now seen corresponding path program 43 times [2021-08-12 19:14:14,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:14,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64093605] [2021-08-12 19:14:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:14,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64093605] [2021-08-12 19:14:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64093605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717610754] [2021-08-12 19:14:14,655 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 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 [2021-08-12 19:14:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:14:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:14,882 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-08-12 19:14:15,235 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_272, v_prenex_274], 15=[ends_with_2]} [2021-08-12 19:14:15,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,244 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 8 treesize of output 1 [2021-08-12 19:14:15,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,253 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 10 treesize of output 1 [2021-08-12 19:14:15,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,261 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 9 treesize of output 1 [2021-08-12 19:14:15,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:15,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:15,268 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 7 treesize of output 1 [2021-08-12 19:14:15,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:15,821 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 110 [2021-08-12 19:14:15,822 INFO L628 ElimStorePlain]: treesize reduction 502, result has 50.2 percent of original size [2021-08-12 19:14:15,827 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 3 treesize of output 1 [2021-08-12 19:14:15,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:15,833 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 5 treesize of output 1 [2021-08-12 19:14:15,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,062 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 19:14:16,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:16,067 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 4 treesize of output 2 [2021-08-12 19:14:16,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,073 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 6 treesize of output 2 [2021-08-12 19:14:16,074 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,079 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 4 treesize of output 2 [2021-08-12 19:14:16,082 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,087 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 6 treesize of output 2 [2021-08-12 19:14:16,088 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,093 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 4 treesize of output 2 [2021-08-12 19:14:16,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,098 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 4 treesize of output 2 [2021-08-12 19:14:16,099 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:16,317 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-08-12 19:14:16,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:16,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:14:16,330 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:1131, output treesize:471 [2021-08-12 19:14:16,684 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 133 [2021-08-12 19:14:18,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-08-12 19:14:18,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:18,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,682 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 10 treesize of output 1 [2021-08-12 19:14:18,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:18,695 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 12 treesize of output 1 [2021-08-12 19:14:18,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:18,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:18,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:18,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:18,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:19,586 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 171 [2021-08-12 19:14:19,586 INFO L628 ElimStorePlain]: treesize reduction 1707, result has 23.3 percent of original size [2021-08-12 19:14:19,593 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 4 treesize of output 2 [2021-08-12 19:14:19,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:19,823 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-08-12 19:14:19,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:19,830 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 6 treesize of output 2 [2021-08-12 19:14:19,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:20,059 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-08-12 19:14:20,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:20,068 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 4 treesize of output 2 [2021-08-12 19:14:20,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:20,076 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 4 treesize of output 2 [2021-08-12 19:14:20,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:20,301 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-08-12 19:14:20,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:20,309 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 5 treesize of output 1 [2021-08-12 19:14:20,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:20,551 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-08-12 19:14:20,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:20,559 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 5 treesize of output 1 [2021-08-12 19:14:20,560 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:20,777 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-08-12 19:14:20,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:20,784 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 3 treesize of output 1 [2021-08-12 19:14:20,785 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,000 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-08-12 19:14:21,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:21,006 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 3 treesize of output 1 [2021-08-12 19:14:21,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,239 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-08-12 19:14:21,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:21,246 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 4 treesize of output 2 [2021-08-12 19:14:21,247 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,253 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 6 treesize of output 2 [2021-08-12 19:14:21,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,465 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-08-12 19:14:21,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:21,471 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 3 treesize of output 1 [2021-08-12 19:14:21,472 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,679 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-08-12 19:14:21,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:21,686 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 5 treesize of output 1 [2021-08-12 19:14:21,686 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:21,906 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-08-12 19:14:21,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:21,913 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 5 treesize of output 1 [2021-08-12 19:14:21,914 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,129 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-08-12 19:14:22,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:22,136 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 4 treesize of output 2 [2021-08-12 19:14:22,137 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,347 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-08-12 19:14:22,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:22,353 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 6 treesize of output 2 [2021-08-12 19:14:22,354 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,360 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 6 treesize of output 2 [2021-08-12 19:14:22,361 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,564 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-08-12 19:14:22,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:22,570 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 4 treesize of output 2 [2021-08-12 19:14:22,571 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,577 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 4 treesize of output 2 [2021-08-12 19:14:22,578 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,771 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-08-12 19:14:22,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:22,777 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 6 treesize of output 2 [2021-08-12 19:14:22,778 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:22,975 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-08-12 19:14:22,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:22,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-08-12 19:14:22,983 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 25 variables, input treesize:2477, output treesize:337 [2021-08-12 19:14:23,242 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-08-12 19:14:23,463 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-08-12 19:14:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717610754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:23,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:23,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:14:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780673150] [2021-08-12 19:14:23,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:14:23,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:14:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:14:23,676 INFO L87 Difference]: Start difference. First operand 688 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:24,481 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-08-12 19:14:24,778 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-08-12 19:14:25,243 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-08-12 19:14:25,487 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-08-12 19:14:26,032 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2021-08-12 19:14:26,258 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2021-08-12 19:14:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:26,864 INFO L93 Difference]: Finished difference Result 901 states and 2937 transitions. [2021-08-12 19:14:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:14:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:14:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:26,866 INFO L225 Difference]: With dead ends: 901 [2021-08-12 19:14:26,867 INFO L226 Difference]: Without dead ends: 854 [2021-08-12 19:14:26,867 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2676.2ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:14:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-08-12 19:14:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 687. [2021-08-12 19:14:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-08-12 19:14:27,168 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-08-12 19:14:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:27,168 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-08-12 19:14:27,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-08-12 19:14:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:27,169 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:27,169 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:27,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5211 [2021-08-12 19:14:27,385 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash -877073888, now seen corresponding path program 44 times [2021-08-12 19:14:27,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:27,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088598340] [2021-08-12 19:14:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:27,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:27,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088598340] [2021-08-12 19:14:27,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088598340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:27,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505134170] [2021-08-12 19:14:27,663 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 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 [2021-08-12 19:14:27,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:14:27,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:14:27,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:27,909 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-08-12 19:14:28,348 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_298, v_prenex_297, v_prenex_300, v_prenex_301, ends_with_10, v_prenex_296], 6=[v_prenex_303]} [2021-08-12 19:14:28,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:28,354 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 8 treesize of output 1 [2021-08-12 19:14:28,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:28,641 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-08-12 19:14:28,641 INFO L628 ElimStorePlain]: treesize reduction 214, result has 58.5 percent of original size [2021-08-12 19:14:28,641 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-08-12 19:14:28,645 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 6 treesize of output 2 [2021-08-12 19:14:28,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:28,887 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-08-12 19:14:28,887 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.3 percent of original size [2021-08-12 19:14:28,891 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 4 treesize of output 2 [2021-08-12 19:14:28,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,008 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-08-12 19:14:29,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:29,012 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 3 treesize of output 1 [2021-08-12 19:14:29,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,127 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-08-12 19:14:29,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:29,131 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 3 treesize of output 1 [2021-08-12 19:14:29,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,244 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-08-12 19:14:29,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:29,248 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 6 treesize of output 2 [2021-08-12 19:14:29,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,252 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 6 treesize of output 2 [2021-08-12 19:14:29,253 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,256 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 6 treesize of output 2 [2021-08-12 19:14:29,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:29,362 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-08-12 19:14:29,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:29,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 7 dim-1 vars, End of recursive call: 4 dim-0 vars, and 9 xjuncts. [2021-08-12 19:14:29,367 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:551, output treesize:263 [2021-08-12 19:14:29,576 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-08-12 19:14:30,676 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6, v_prenex_309], 3=[v_prenex_312], 10=[ends_with_2, v_prenex_306], 15=[v_prenex_311]} [2021-08-12 19:14:30,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:30,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,696 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 7 treesize of output 1 [2021-08-12 19:14:30,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,704 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 8 treesize of output 1 [2021-08-12 19:14:30,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:30,712 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 8 treesize of output 1 [2021-08-12 19:14:30,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:30,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,726 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 3 treesize of output 1 [2021-08-12 19:14:30,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:30,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:30,734 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,327 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2021-08-12 19:14:31,328 INFO L628 ElimStorePlain]: treesize reduction 659, result has 48.6 percent of original size [2021-08-12 19:14:31,332 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 6 treesize of output 2 [2021-08-12 19:14:31,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,337 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 6 treesize of output 2 [2021-08-12 19:14:31,338 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,591 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 19:14:31,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:31,596 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 5 treesize of output 1 [2021-08-12 19:14:31,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,601 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 5 treesize of output 1 [2021-08-12 19:14:31,602 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,606 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 6 treesize of output 2 [2021-08-12 19:14:31,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,611 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 4 treesize of output 2 [2021-08-12 19:14:31,612 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,616 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 4 treesize of output 2 [2021-08-12 19:14:31,617 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,624 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 4 treesize of output 2 [2021-08-12 19:14:31,631 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,637 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 5 treesize of output 1 [2021-08-12 19:14:31,637 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,642 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 4 treesize of output 2 [2021-08-12 19:14:31,643 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,647 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 4 treesize of output 2 [2021-08-12 19:14:31,648 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-08-12 19:14:31,653 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,658 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 4 treesize of output 2 [2021-08-12 19:14:31,658 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,663 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 4 treesize of output 2 [2021-08-12 19:14:31,664 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:31,669 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 6 treesize of output 2 [2021-08-12 19:14:31,670 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,078 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-08-12 19:14:32,078 INFO L628 ElimStorePlain]: treesize reduction 69, result has 87.5 percent of original size [2021-08-12 19:14:32,083 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 3 treesize of output 1 [2021-08-12 19:14:32,084 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,087 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 3 treesize of output 1 [2021-08-12 19:14:32,088 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,288 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 19:14:32,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:32,292 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 5 treesize of output 1 [2021-08-12 19:14:32,293 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,297 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 5 treesize of output 1 [2021-08-12 19:14:32,297 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,489 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 19:14:32,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:32,494 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 6 treesize of output 2 [2021-08-12 19:14:32,495 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,499 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 6 treesize of output 2 [2021-08-12 19:14:32,500 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,504 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 4 treesize of output 2 [2021-08-12 19:14:32,505 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,509 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 6 treesize of output 2 [2021-08-12 19:14:32,510 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,514 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 6 treesize of output 2 [2021-08-12 19:14:32,516 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,520 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 4 treesize of output 2 [2021-08-12 19:14:32,521 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,526 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 4 treesize of output 2 [2021-08-12 19:14:32,527 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,531 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 4 treesize of output 2 [2021-08-12 19:14:32,532 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,535 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 4 treesize of output 2 [2021-08-12 19:14:32,536 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,540 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 6 treesize of output 2 [2021-08-12 19:14:32,541 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,545 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 6 treesize of output 2 [2021-08-12 19:14:32,546 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:32,881 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-08-12 19:14:32,882 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-08-12 19:14:32,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 6 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-08-12 19:14:32,887 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 16 variables, input treesize:1485, output treesize:323 [2021-08-12 19:14:33,049 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-08-12 19:14:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:33,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505134170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:33,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:33,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:14:33,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223210756] [2021-08-12 19:14:33,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:14:33,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:33,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:14:33,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:14:33,215 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:14:33,724 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-08-12 19:14:34,055 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-08-12 19:14:34,434 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-08-12 19:14:34,880 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-08-12 19:14:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:35,905 INFO L93 Difference]: Finished difference Result 878 states and 2871 transitions. [2021-08-12 19:14:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:14:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:14:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:35,908 INFO L225 Difference]: With dead ends: 878 [2021-08-12 19:14:35,908 INFO L226 Difference]: Without dead ends: 861 [2021-08-12 19:14:35,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1920.3ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:14:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-12 19:14:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 687. [2021-08-12 19:14:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-08-12 19:14:36,222 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-08-12 19:14:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:36,222 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-08-12 19:14:36,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:14:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-08-12 19:14:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:36,223 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:36,223 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:36,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5965,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:14:36,442 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash -570151136, now seen corresponding path program 45 times [2021-08-12 19:14:36,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:36,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259567306] [2021-08-12 19:14:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:36,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:36,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259567306] [2021-08-12 19:14:36,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259567306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:36,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473676100] [2021-08-12 19:14:36,688 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 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 [2021-08-12 19:14:36,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:14:36,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:36,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:14:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:36,914 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-08-12 19:14:37,492 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_321, ends_with_10], 15=[v_prenex_323]} [2021-08-12 19:14:37,500 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 6 treesize of output 2 [2021-08-12 19:14:37,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:37,511 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 13 treesize of output 2 [2021-08-12 19:14:37,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:37,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:14:37,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:37,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:37,539 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 10 treesize of output 1 [2021-08-12 19:14:37,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,086 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 142 [2021-08-12 19:14:38,087 INFO L628 ElimStorePlain]: treesize reduction 214, result has 73.6 percent of original size [2021-08-12 19:14:38,093 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 3 treesize of output 1 [2021-08-12 19:14:38,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,099 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 4 treesize of output 2 [2021-08-12 19:14:38,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,105 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 4 treesize of output 2 [2021-08-12 19:14:38,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,112 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 4 treesize of output 2 [2021-08-12 19:14:38,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,118 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 4 treesize of output 2 [2021-08-12 19:14:38,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,124 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 6 treesize of output 2 [2021-08-12 19:14:38,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,593 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2021-08-12 19:14:38,594 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.5 percent of original size [2021-08-12 19:14:38,599 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 3 treesize of output 1 [2021-08-12 19:14:38,600 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,606 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 3 treesize of output 1 [2021-08-12 19:14:38,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,612 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 3 treesize of output 1 [2021-08-12 19:14:38,613 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:38,840 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-08-12 19:14:38,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:38,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 13 xjuncts. [2021-08-12 19:14:38,856 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 12 variables, input treesize:892, output treesize:549 [2021-08-12 19:14:39,197 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 118 [2021-08-12 19:14:41,455 INFO L446 ElimStorePlain]: Different costs {10=[ends_with_6], 15=[ends_with_2], 21=[v_prenex_338], 28=[v_prenex_337]} [2021-08-12 19:14:41,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,467 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 7 treesize of output 1 [2021-08-12 19:14:41,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,478 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 10 treesize of output 1 [2021-08-12 19:14:41,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,488 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 3 treesize of output 1 [2021-08-12 19:14:41,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:41,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:41,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:41,517 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 8 treesize of output 1 [2021-08-12 19:14:41,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:41,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:41,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,161 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 135 [2021-08-12 19:14:42,161 INFO L628 ElimStorePlain]: treesize reduction 662, result has 48.4 percent of original size [2021-08-12 19:14:42,167 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 3 treesize of output 1 [2021-08-12 19:14:42,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,173 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 3 treesize of output 1 [2021-08-12 19:14:42,174 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,435 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-08-12 19:14:42,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:42,441 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 6 treesize of output 2 [2021-08-12 19:14:42,442 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,448 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 4 treesize of output 2 [2021-08-12 19:14:42,449 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,454 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 6 treesize of output 2 [2021-08-12 19:14:42,455 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,461 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 4 treesize of output 2 [2021-08-12 19:14:42,462 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,468 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 5 treesize of output 1 [2021-08-12 19:14:42,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,477 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 4 treesize of output 2 [2021-08-12 19:14:42,478 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,484 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 4 treesize of output 2 [2021-08-12 19:14:42,485 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,491 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 5 treesize of output 1 [2021-08-12 19:14:42,492 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,498 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 5 treesize of output 1 [2021-08-12 19:14:42,498 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,504 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 6 treesize of output 2 [2021-08-12 19:14:42,505 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,511 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 4 treesize of output 2 [2021-08-12 19:14:42,512 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,749 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 19:14:42,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:42,755 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 6 treesize of output 2 [2021-08-12 19:14:42,756 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,763 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 4 treesize of output 2 [2021-08-12 19:14:42,764 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,769 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 4 treesize of output 2 [2021-08-12 19:14:42,770 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,776 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 6 treesize of output 2 [2021-08-12 19:14:42,776 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,782 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 6 treesize of output 2 [2021-08-12 19:14:42,782 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,788 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 4 treesize of output 2 [2021-08-12 19:14:42,789 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,794 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 5 treesize of output 1 [2021-08-12 19:14:42,795 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,801 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 6 treesize of output 2 [2021-08-12 19:14:42,801 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,807 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 5 treesize of output 1 [2021-08-12 19:14:42,808 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,813 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 5 treesize of output 1 [2021-08-12 19:14:42,814 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:42,819 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 4 treesize of output 2 [2021-08-12 19:14:42,820 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:43,224 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2021-08-12 19:14:43,225 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-08-12 19:14:43,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 4 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-08-12 19:14:43,231 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 19 variables, input treesize:1554, output treesize:404 [2021-08-12 19:14:43,437 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-08-12 19:14:43,636 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-08-12 19:14:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:43,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473676100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:43,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:43,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:14:43,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684692613] [2021-08-12 19:14:43,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:14:43,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:14:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:14:43,851 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:44,647 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-08-12 19:14:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:45,493 INFO L93 Difference]: Finished difference Result 805 states and 2654 transitions. [2021-08-12 19:14:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:14:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:14:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:45,496 INFO L225 Difference]: With dead ends: 805 [2021-08-12 19:14:45,496 INFO L226 Difference]: Without dead ends: 788 [2021-08-12 19:14:45,496 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1476.4ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:14:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-08-12 19:14:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 687. [2021-08-12 19:14:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3862973760932946) internal successors, (2323), 686 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2323 transitions. [2021-08-12 19:14:45,894 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2323 transitions. Word has length 20 [2021-08-12 19:14:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:45,894 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2323 transitions. [2021-08-12 19:14:45,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2323 transitions. [2021-08-12 19:14:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:45,895 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:45,895 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:46,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6175 [2021-08-12 19:14:46,096 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash -153141940, now seen corresponding path program 46 times [2021-08-12 19:14:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:46,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782093131] [2021-08-12 19:14:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:46,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:46,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782093131] [2021-08-12 19:14:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782093131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:46,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596709788] [2021-08-12 19:14:46,343 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 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 [2021-08-12 19:14:46,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:14:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:14:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:46,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,805 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 8 treesize of output 1 [2021-08-12 19:14:46,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,810 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 9 treesize of output 2 [2021-08-12 19:14:46,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:14:46,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:14:46,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,828 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 9 treesize of output 2 [2021-08-12 19:14:46,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,834 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 10 treesize of output 1 [2021-08-12 19:14:46,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,839 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 7 treesize of output 1 [2021-08-12 19:14:46,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:46,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:46,849 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,854 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 8 treesize of output 1 [2021-08-12 19:14:46,854 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:46,859 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,863 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 10 treesize of output 1 [2021-08-12 19:14:46,864 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,869 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 7 treesize of output 1 [2021-08-12 19:14:46,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,875 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 10 treesize of output 1 [2021-08-12 19:14:46,875 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,880 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 10 treesize of output 1 [2021-08-12 19:14:46,880 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,885 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 9 treesize of output 1 [2021-08-12 19:14:46,885 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:46,889 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,894 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 9 treesize of output 1 [2021-08-12 19:14:46,895 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,899 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 10 treesize of output 1 [2021-08-12 19:14:46,900 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:46,904 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:14:46,909 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,913 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 8 treesize of output 1 [2021-08-12 19:14:46,914 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,918 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 10 treesize of output 1 [2021-08-12 19:14:46,919 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:14:46,924 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:46,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:46,927 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 8 treesize of output 1 [2021-08-12 19:14:46,928 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:47,228 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-08-12 19:14:47,229 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-08-12 19:14:47,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:14:47,233 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:357 [2021-08-12 19:14:47,513 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-08-12 19:14:49,149 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_350], 6=[ends_with_10], 21=[v_prenex_349], 36=[ends_with_2]} [2021-08-12 19:14:49,156 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 3 treesize of output 1 [2021-08-12 19:14:49,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:49,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:49,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:49,173 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 8 treesize of output 1 [2021-08-12 19:14:49,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:49,181 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 8 treesize of output 1 [2021-08-12 19:14:49,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:49,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:49,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:14:49,202 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:14:49,209 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 7 treesize of output 1 [2021-08-12 19:14:49,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,701 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2021-08-12 19:14:49,701 INFO L628 ElimStorePlain]: treesize reduction 1212, result has 26.0 percent of original size [2021-08-12 19:14:49,709 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 4 treesize of output 2 [2021-08-12 19:14:49,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,714 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 4 treesize of output 2 [2021-08-12 19:14:49,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,719 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 4 treesize of output 2 [2021-08-12 19:14:49,720 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,724 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 4 treesize of output 2 [2021-08-12 19:14:49,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,729 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 4 treesize of output 2 [2021-08-12 19:14:49,730 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,910 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-08-12 19:14:49,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:49,914 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 3 treesize of output 1 [2021-08-12 19:14:49,915 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:49,919 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 5 treesize of output 1 [2021-08-12 19:14:49,920 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,095 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-08-12 19:14:50,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:50,101 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 4 treesize of output 2 [2021-08-12 19:14:50,102 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,106 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 4 treesize of output 2 [2021-08-12 19:14:50,107 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,111 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 5 treesize of output 1 [2021-08-12 19:14:50,111 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,116 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 4 treesize of output 2 [2021-08-12 19:14:50,116 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,121 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 4 treesize of output 2 [2021-08-12 19:14:50,121 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,125 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 3 treesize of output 1 [2021-08-12 19:14:50,126 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,130 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 4 treesize of output 2 [2021-08-12 19:14:50,131 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,135 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 6 treesize of output 2 [2021-08-12 19:14:50,136 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,140 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 6 treesize of output 2 [2021-08-12 19:14:50,141 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:14:50,304 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-08-12 19:14:50,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:14:50,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-08-12 19:14:50,308 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 13 variables, input treesize:1934, output treesize:270 [2021-08-12 19:14:50,485 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-08-12 19:14:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:50,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596709788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:50,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:50,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:14:50,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498083551] [2021-08-12 19:14:50,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:14:50,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:50,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:14:50,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:14:50,743 INFO L87 Difference]: Start difference. First operand 687 states and 2323 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:14:51,978 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-08-12 19:14:52,706 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-08-12 19:14:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:54,067 INFO L93 Difference]: Finished difference Result 979 states and 3162 transitions. [2021-08-12 19:14:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:14:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:14:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:54,070 INFO L225 Difference]: With dead ends: 979 [2021-08-12 19:14:54,070 INFO L226 Difference]: Without dead ends: 962 [2021-08-12 19:14:54,070 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2075.3ms TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:14:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-08-12 19:14:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 693. [2021-08-12 19:14:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.38728323699422) internal successors, (2344), 692 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2344 transitions. [2021-08-12 19:14:54,386 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2344 transitions. Word has length 20 [2021-08-12 19:14:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:54,387 INFO L482 AbstractCegarLoop]: Abstraction has 693 states and 2344 transitions. [2021-08-12 19:14:54,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:14:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2344 transitions. [2021-08-12 19:14:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:54,388 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:54,388 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:54,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6572,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:14:54,588 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1665161384, now seen corresponding path program 47 times [2021-08-12 19:14:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:54,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671931426] [2021-08-12 19:14:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:54,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671931426] [2021-08-12 19:14:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671931426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529855170] [2021-08-12 19:14:54,833 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 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 [2021-08-12 19:14:54,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:14:54,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:14:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529855170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:14:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183043774] [2021-08-12 19:14:55,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:14:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:55,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:14:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:14:55,322 INFO L87 Difference]: Start difference. First operand 693 states and 2344 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:14:56,040 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-08-12 19:14:56,211 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-08-12 19:14:56,565 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-08-12 19:14:56,881 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-08-12 19:14:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:14:57,911 INFO L93 Difference]: Finished difference Result 798 states and 2612 transitions. [2021-08-12 19:14:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:14:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:14:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:14:57,914 INFO L225 Difference]: With dead ends: 798 [2021-08-12 19:14:57,914 INFO L226 Difference]: Without dead ends: 766 [2021-08-12 19:14:57,914 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1570.4ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:14:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-12 19:14:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 691. [2021-08-12 19:14:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.3869565217391306) internal successors, (2337), 690 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2337 transitions. [2021-08-12 19:14:58,227 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2337 transitions. Word has length 20 [2021-08-12 19:14:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:14:58,227 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2337 transitions. [2021-08-12 19:14:58,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:14:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2337 transitions. [2021-08-12 19:14:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:14:58,228 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:14:58,228 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:14:58,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7082 [2021-08-12 19:14:58,429 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:14:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:14:58,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1872779544, now seen corresponding path program 48 times [2021-08-12 19:14:58,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:14:58,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076176485] [2021-08-12 19:14:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:14:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:14:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:58,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:14:58,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076176485] [2021-08-12 19:14:58,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076176485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:58,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729662437] [2021-08-12 19:14:58,688 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 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 [2021-08-12 19:14:58,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:14:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:14:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:14:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:14:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:14:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729662437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:14:59,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:14:59,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:14:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370168485] [2021-08-12 19:14:59,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:14:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:14:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:14:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:14:59,181 INFO L87 Difference]: Start difference. First operand 691 states and 2337 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:14:59,677 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-08-12 19:15:00,050 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-08-12 19:15:00,937 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-08-12 19:15:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:01,522 INFO L93 Difference]: Finished difference Result 862 states and 2781 transitions. [2021-08-12 19:15:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:15:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:15:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:01,525 INFO L225 Difference]: With dead ends: 862 [2021-08-12 19:15:01,525 INFO L226 Difference]: Without dead ends: 800 [2021-08-12 19:15:01,525 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1171.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:15:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-12 19:15:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 701. [2021-08-12 19:15:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.394285714285714) internal successors, (2376), 700 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2376 transitions. [2021-08-12 19:15:01,911 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2376 transitions. Word has length 20 [2021-08-12 19:15:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:01,911 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2376 transitions. [2021-08-12 19:15:01,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2376 transitions. [2021-08-12 19:15:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:01,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:01,913 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:02,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7105,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:02,114 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1843084844, now seen corresponding path program 49 times [2021-08-12 19:15:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:02,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960529538] [2021-08-12 19:15:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:02,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960529538] [2021-08-12 19:15:02,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960529538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116267170] [2021-08-12 19:15:02,445 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 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 [2021-08-12 19:15:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:15:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,980 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 10 treesize of output 1 [2021-08-12 19:15:02,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,987 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 9 treesize of output 2 [2021-08-12 19:15:02,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:02,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,993 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 10 treesize of output 1 [2021-08-12 19:15:02,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,000 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 8 treesize of output 1 [2021-08-12 19:15:03,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:03,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,026 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 8 treesize of output 1 [2021-08-12 19:15:03,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,033 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 9 treesize of output 1 [2021-08-12 19:15:03,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,042 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 10 treesize of output 1 [2021-08-12 19:15:03,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:03,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:03,056 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:03,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:03,068 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,075 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 10 treesize of output 1 [2021-08-12 19:15:03,075 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:03,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:03,085 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:03,105 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,113 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 9 treesize of output 2 [2021-08-12 19:15:03,114 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,119 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 10 treesize of output 1 [2021-08-12 19:15:03,120 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:03,124 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,129 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 9 treesize of output 1 [2021-08-12 19:15:03,130 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,136 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 10 treesize of output 1 [2021-08-12 19:15:03,137 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,142 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 7 treesize of output 1 [2021-08-12 19:15:03,143 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,148 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 10 treesize of output 1 [2021-08-12 19:15:03,149 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,154 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 8 treesize of output 1 [2021-08-12 19:15:03,155 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,160 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 8 treesize of output 1 [2021-08-12 19:15:03,160 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,166 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 9 treesize of output 2 [2021-08-12 19:15:03,166 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,172 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 8 treesize of output 1 [2021-08-12 19:15:03,172 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,177 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 7 treesize of output 1 [2021-08-12 19:15:03,178 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,183 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 10 treesize of output 1 [2021-08-12 19:15:03,183 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:03,187 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 10 treesize of output 1 [2021-08-12 19:15:03,188 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:03,453 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-08-12 19:15:03,454 INFO L628 ElimStorePlain]: treesize reduction 121, result has 70.2 percent of original size [2021-08-12 19:15:03,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-08-12 19:15:03,458 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 2 variables, input treesize:1382, output treesize:285 [2021-08-12 19:15:03,753 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-08-12 19:15:04,297 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6], 1=[v_prenex_368, v_prenex_362], 3=[v_prenex_370], 6=[ends_with_2], 10=[v_prenex_365, v_prenex_369, v_prenex_360, v_prenex_361]} [2021-08-12 19:15:04,306 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 6 treesize of output 2 [2021-08-12 19:15:04,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,315 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 6 treesize of output 2 [2021-08-12 19:15:04,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:04,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:04,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,883 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 132 [2021-08-12 19:15:04,883 INFO L628 ElimStorePlain]: treesize reduction 318, result has 61.3 percent of original size [2021-08-12 19:15:04,890 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 6 treesize of output 2 [2021-08-12 19:15:04,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,897 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 4 treesize of output 2 [2021-08-12 19:15:04,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:04,904 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 4 treesize of output 2 [2021-08-12 19:15:04,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,122 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-08-12 19:15:05,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:05,129 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 3 treesize of output 1 [2021-08-12 19:15:05,130 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,136 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 5 treesize of output 1 [2021-08-12 19:15:05,137 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,355 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 19:15:05,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:05,361 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 5 treesize of output 1 [2021-08-12 19:15:05,362 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,368 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 5 treesize of output 1 [2021-08-12 19:15:05,369 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,375 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 3 treesize of output 1 [2021-08-12 19:15:05,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,383 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 5 treesize of output 1 [2021-08-12 19:15:05,384 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,391 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 5 treesize of output 1 [2021-08-12 19:15:05,392 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,601 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-08-12 19:15:05,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:05,609 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 5 treesize of output 1 [2021-08-12 19:15:05,610 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,617 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 5 treesize of output 1 [2021-08-12 19:15:05,619 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,828 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-08-12 19:15:05,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:05,836 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 4 treesize of output 2 [2021-08-12 19:15:05,837 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,845 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 4 treesize of output 2 [2021-08-12 19:15:05,846 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:05,855 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 6 treesize of output 2 [2021-08-12 19:15:05,856 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,048 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 19:15:06,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:06,054 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 3 treesize of output 1 [2021-08-12 19:15:06,055 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,061 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 5 treesize of output 1 [2021-08-12 19:15:06,062 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,417 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-08-12 19:15:06,417 INFO L628 ElimStorePlain]: treesize reduction 39, result has 90.9 percent of original size [2021-08-12 19:15:06,422 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 4 treesize of output 2 [2021-08-12 19:15:06,423 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,428 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 6 treesize of output 2 [2021-08-12 19:15:06,429 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,434 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 6 treesize of output 2 [2021-08-12 19:15:06,435 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,600 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 19:15:06,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:06,605 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 3 treesize of output 1 [2021-08-12 19:15:06,606 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:06,768 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-08-12 19:15:06,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:06,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 9 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-08-12 19:15:06,773 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 20 variables, input treesize:933, output treesize:290 [2021-08-12 19:15:07,006 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-08-12 19:15:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:07,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116267170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:07,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:07,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:15:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379928769] [2021-08-12 19:15:07,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:15:07,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:15:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:15:07,320 INFO L87 Difference]: Start difference. First operand 701 states and 2376 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:07,472 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-08-12 19:15:07,776 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 32 [2021-08-12 19:15:08,065 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 37 [2021-08-12 19:15:09,163 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-08-12 19:15:09,409 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-08-12 19:15:09,995 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-08-12 19:15:10,394 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-08-12 19:15:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:11,573 INFO L93 Difference]: Finished difference Result 1012 states and 3264 transitions. [2021-08-12 19:15:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:15:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:15:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:11,576 INFO L225 Difference]: With dead ends: 1012 [2021-08-12 19:15:11,576 INFO L226 Difference]: Without dead ends: 965 [2021-08-12 19:15:11,576 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2855.4ms TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:15:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-08-12 19:15:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 701. [2021-08-12 19:15:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.394285714285714) internal successors, (2376), 700 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2376 transitions. [2021-08-12 19:15:11,930 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2376 transitions. Word has length 20 [2021-08-12 19:15:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:11,931 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2376 transitions. [2021-08-12 19:15:11,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2376 transitions. [2021-08-12 19:15:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:11,932 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:11,932 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:12,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7124 [2021-08-12 19:15:12,132 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2081522154, now seen corresponding path program 50 times [2021-08-12 19:15:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:12,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177930861] [2021-08-12 19:15:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:12,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:12,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177930861] [2021-08-12 19:15:12,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177930861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:12,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947191796] [2021-08-12 19:15:12,342 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 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 [2021-08-12 19:15:12,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:15:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:12,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:15:12,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,586 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 9 treesize of output 2 [2021-08-12 19:15:12,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,591 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 9 treesize of output 2 [2021-08-12 19:15:12,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:12,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,599 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 9 treesize of output 2 [2021-08-12 19:15:12,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,604 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 8 treesize of output 1 [2021-08-12 19:15:12,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,609 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 8 treesize of output 1 [2021-08-12 19:15:12,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,613 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 7 treesize of output 1 [2021-08-12 19:15:12,614 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,618 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 7 treesize of output 1 [2021-08-12 19:15:12,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:12,623 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,627 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 8 treesize of output 1 [2021-08-12 19:15:12,628 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,633 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 8 treesize of output 1 [2021-08-12 19:15:12,633 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,637 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 8 treesize of output 1 [2021-08-12 19:15:12,638 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,643 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 7 treesize of output 1 [2021-08-12 19:15:12,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,647 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 8 treesize of output 1 [2021-08-12 19:15:12,648 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,651 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 7 treesize of output 1 [2021-08-12 19:15:12,653 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:12,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,661 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 8 treesize of output 1 [2021-08-12 19:15:12,661 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:12,665 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:12,668 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 8 treesize of output 1 [2021-08-12 19:15:12,669 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,672 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 9 treesize of output 2 [2021-08-12 19:15:12,672 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:12,858 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-08-12 19:15:12,858 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-08-12 19:15:12,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:15:12,860 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:699, output treesize:220 [2021-08-12 19:15:13,370 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-08-12 19:15:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:13,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947191796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:13,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:13,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:15:13,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272791446] [2021-08-12 19:15:13,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:15:13,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:15:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:15:13,496 INFO L87 Difference]: Start difference. First operand 701 states and 2376 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:13,886 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-08-12 19:15:14,448 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-08-12 19:15:14,722 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-08-12 19:15:15,179 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-08-12 19:15:15,347 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-08-12 19:15:15,508 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-08-12 19:15:17,304 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-08-12 19:15:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:17,324 INFO L93 Difference]: Finished difference Result 1105 states and 3510 transitions. [2021-08-12 19:15:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:15:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:15:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:17,327 INFO L225 Difference]: With dead ends: 1105 [2021-08-12 19:15:17,327 INFO L226 Difference]: Without dead ends: 1028 [2021-08-12 19:15:17,327 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1786.4ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:15:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-08-12 19:15:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 714. [2021-08-12 19:15:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.4137447405329593) internal successors, (2434), 713 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2434 transitions. [2021-08-12 19:15:17,707 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2434 transitions. Word has length 20 [2021-08-12 19:15:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:17,708 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2434 transitions. [2021-08-12 19:15:17,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2434 transitions. [2021-08-12 19:15:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:17,709 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:17,709 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:17,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7347,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:17,918 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1028363162, now seen corresponding path program 51 times [2021-08-12 19:15:17,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:17,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058251414] [2021-08-12 19:15:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058251414] [2021-08-12 19:15:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058251414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110785538] [2021-08-12 19:15:18,115 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 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 [2021-08-12 19:15:18,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:15:18,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:18,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:15:18,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:18,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,388 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 8 treesize of output 1 [2021-08-12 19:15:18,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,393 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 8 treesize of output 1 [2021-08-12 19:15:18,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,399 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 7 treesize of output 1 [2021-08-12 19:15:18,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,404 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 8 treesize of output 1 [2021-08-12 19:15:18,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,409 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 8 treesize of output 1 [2021-08-12 19:15:18,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,415 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 8 treesize of output 1 [2021-08-12 19:15:18,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,420 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 8 treesize of output 1 [2021-08-12 19:15:18,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,426 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 8 treesize of output 1 [2021-08-12 19:15:18,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,433 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 9 treesize of output 2 [2021-08-12 19:15:18,434 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-12 19:15:18,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,446 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 9 treesize of output 2 [2021-08-12 19:15:18,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,452 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 9 treesize of output 2 [2021-08-12 19:15:18,453 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,458 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 9 treesize of output 2 [2021-08-12 19:15:18,459 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:18,464 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,469 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 9 treesize of output 2 [2021-08-12 19:15:18,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,475 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 8 treesize of output 1 [2021-08-12 19:15:18,476 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,480 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 9 treesize of output 2 [2021-08-12 19:15:18,481 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,491 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 8 treesize of output 1 [2021-08-12 19:15:18,492 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,497 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 8 treesize of output 1 [2021-08-12 19:15:18,498 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,502 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 7 treesize of output 1 [2021-08-12 19:15:18,503 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,507 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 7 treesize of output 1 [2021-08-12 19:15:18,508 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,511 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 9 treesize of output 2 [2021-08-12 19:15:18,512 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,516 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 8 treesize of output 1 [2021-08-12 19:15:18,516 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:18,520 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 9 treesize of output 2 [2021-08-12 19:15:18,520 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,524 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 8 treesize of output 1 [2021-08-12 19:15:18,525 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,753 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-08-12 19:15:18,753 INFO L628 ElimStorePlain]: treesize reduction 124, result has 65.7 percent of original size [2021-08-12 19:15:18,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:15:18,755 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 1 variables, input treesize:941, output treesize:237 [2021-08-12 19:15:18,877 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-08-12 19:15:18,968 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_374, v_prenex_376, ends_with_6, v_prenex_372], 1=[v_prenex_375, ends_with_10, v_prenex_371, v_prenex_373]} [2021-08-12 19:15:18,973 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 6 treesize of output 2 [2021-08-12 19:15:18,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:18,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:18,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,223 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-08-12 19:15:19,224 INFO L628 ElimStorePlain]: treesize reduction 147, result has 61.5 percent of original size [2021-08-12 19:15:19,228 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 5 treesize of output 1 [2021-08-12 19:15:19,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,347 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-08-12 19:15:19,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,351 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 5 treesize of output 1 [2021-08-12 19:15:19,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,458 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-08-12 19:15:19,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,462 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 6 treesize of output 2 [2021-08-12 19:15:19,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,569 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-08-12 19:15:19,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,573 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 6 treesize of output 2 [2021-08-12 19:15:19,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,680 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-08-12 19:15:19,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,684 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 5 treesize of output 1 [2021-08-12 19:15:19,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,785 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-08-12 19:15:19,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,789 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 4 treesize of output 2 [2021-08-12 19:15:19,789 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,890 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 5 treesize of output 1 [2021-08-12 19:15:19,890 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:19,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:19,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:15:19,990 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:429, output treesize:195 [2021-08-12 19:15:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110785538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:20,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:20,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:15:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560499468] [2021-08-12 19:15:20,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:15:20,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:15:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:15:20,322 INFO L87 Difference]: Start difference. First operand 714 states and 2434 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:20,854 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-08-12 19:15:21,151 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-08-12 19:15:21,583 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-08-12 19:15:21,754 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-08-12 19:15:22,207 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-08-12 19:15:22,911 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-08-12 19:15:23,205 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-08-12 19:15:24,017 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-08-12 19:15:24,258 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-08-12 19:15:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:26,303 INFO L93 Difference]: Finished difference Result 1280 states and 3961 transitions. [2021-08-12 19:15:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:15:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:15:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:26,306 INFO L225 Difference]: With dead ends: 1280 [2021-08-12 19:15:26,306 INFO L226 Difference]: Without dead ends: 1173 [2021-08-12 19:15:26,306 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2915.4ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:15:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-12 19:15:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 706. [2021-08-12 19:15:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.4184397163120566) internal successors, (2410), 705 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2410 transitions. [2021-08-12 19:15:26,709 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2410 transitions. Word has length 20 [2021-08-12 19:15:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2410 transitions. [2021-08-12 19:15:26,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2410 transitions. [2021-08-12 19:15:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:26,711 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:26,711 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:26,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7413,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:26,911 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1118175910, now seen corresponding path program 52 times [2021-08-12 19:15:26,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:26,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445575783] [2021-08-12 19:15:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:27,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445575783] [2021-08-12 19:15:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445575783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217701881] [2021-08-12 19:15:27,175 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 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 [2021-08-12 19:15:27,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:15:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:15:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:27,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217701881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:27,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:27,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:15:27,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294409704] [2021-08-12 19:15:27,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:15:27,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:15:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:15:27,697 INFO L87 Difference]: Start difference. First operand 706 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:28,680 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-08-12 19:15:29,321 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-08-12 19:15:29,499 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-08-12 19:15:30,452 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-08-12 19:15:31,304 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-08-12 19:15:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:32,527 INFO L93 Difference]: Finished difference Result 1209 states and 3828 transitions. [2021-08-12 19:15:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:15:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:15:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:32,531 INFO L225 Difference]: With dead ends: 1209 [2021-08-12 19:15:32,531 INFO L226 Difference]: Without dead ends: 1162 [2021-08-12 19:15:32,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1915.0ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:15:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-08-12 19:15:32,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 702. [2021-08-12 19:15:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.4151212553495007) internal successors, (2394), 701 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2394 transitions. [2021-08-12 19:15:32,973 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2394 transitions. Word has length 20 [2021-08-12 19:15:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2394 transitions. [2021-08-12 19:15:32,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2394 transitions. [2021-08-12 19:15:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:32,975 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:32,975 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:33,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7458,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:33,175 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1774648740, now seen corresponding path program 53 times [2021-08-12 19:15:33,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:33,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787753052] [2021-08-12 19:15:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:33,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787753052] [2021-08-12 19:15:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787753052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:33,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242599708] [2021-08-12 19:15:33,396 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 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 [2021-08-12 19:15:33,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:15:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:15:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:33,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242599708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:33,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:33,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:15:33,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110114718] [2021-08-12 19:15:33,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:15:33,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:33,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:15:33,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:15:33,996 INFO L87 Difference]: Start difference. First operand 702 states and 2394 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:15:34,687 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-08-12 19:15:35,139 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-08-12 19:15:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:36,767 INFO L93 Difference]: Finished difference Result 973 states and 3169 transitions. [2021-08-12 19:15:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:15:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:15:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:36,771 INFO L225 Difference]: With dead ends: 973 [2021-08-12 19:15:36,771 INFO L226 Difference]: Without dead ends: 956 [2021-08-12 19:15:36,771 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1038.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:15:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-12 19:15:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 700. [2021-08-12 19:15:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.4148783977110155) internal successors, (2387), 699 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2387 transitions. [2021-08-12 19:15:37,187 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2387 transitions. Word has length 20 [2021-08-12 19:15:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:37,188 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 2387 transitions. [2021-08-12 19:15:37,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:15:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2387 transitions. [2021-08-12 19:15:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:37,189 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:37,189 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:37,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7481,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:37,389 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1692370732, now seen corresponding path program 54 times [2021-08-12 19:15:37,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:37,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900208400] [2021-08-12 19:15:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:37,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:37,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900208400] [2021-08-12 19:15:37,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900208400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:37,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166493318] [2021-08-12 19:15:37,615 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 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 [2021-08-12 19:15:37,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:15:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:15:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166493318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:38,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:38,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:15:38,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18672404] [2021-08-12 19:15:38,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:15:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:15:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:15:38,026 INFO L87 Difference]: Start difference. First operand 700 states and 2387 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:39,600 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-08-12 19:15:40,453 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-08-12 19:15:40,686 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-08-12 19:15:41,560 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-08-12 19:15:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:42,703 INFO L93 Difference]: Finished difference Result 1113 states and 3557 transitions. [2021-08-12 19:15:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:15:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:15:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:42,707 INFO L225 Difference]: With dead ends: 1113 [2021-08-12 19:15:42,707 INFO L226 Difference]: Without dead ends: 1096 [2021-08-12 19:15:42,707 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1778.2ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:15:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-08-12 19:15:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 697. [2021-08-12 19:15:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.413793103448276) internal successors, (2376), 696 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2376 transitions. [2021-08-12 19:15:43,125 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2376 transitions. Word has length 20 [2021-08-12 19:15:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:43,125 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2376 transitions. [2021-08-12 19:15:43,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2376 transitions. [2021-08-12 19:15:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:43,126 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:43,126 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:43,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7500 [2021-08-12 19:15:43,327 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -200334708, now seen corresponding path program 55 times [2021-08-12 19:15:43,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:43,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295574910] [2021-08-12 19:15:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:43,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295574910] [2021-08-12 19:15:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295574910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770048654] [2021-08-12 19:15:43,698 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 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 [2021-08-12 19:15:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:15:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:43,911 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-08-12 19:15:44,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:44,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:44,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,139 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 9 treesize of output 1 [2021-08-12 19:15:44,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,144 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 10 treesize of output 1 [2021-08-12 19:15:44,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,150 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 9 treesize of output 2 [2021-08-12 19:15:44,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,156 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 10 treesize of output 1 [2021-08-12 19:15:44,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,161 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 10 treesize of output 1 [2021-08-12 19:15:44,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:44,166 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:44,170 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,175 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 10 treesize of output 1 [2021-08-12 19:15:44,176 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,181 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 10 treesize of output 1 [2021-08-12 19:15:44,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:44,187 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,192 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 10 treesize of output 1 [2021-08-12 19:15:44,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,197 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 7 treesize of output 1 [2021-08-12 19:15:44,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,202 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 8 treesize of output 1 [2021-08-12 19:15:44,203 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:44,208 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,212 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 8 treesize of output 1 [2021-08-12 19:15:44,213 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:15:44,218 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,223 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 8 treesize of output 1 [2021-08-12 19:15:44,223 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,228 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 9 treesize of output 2 [2021-08-12 19:15:44,229 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,233 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 7 treesize of output 1 [2021-08-12 19:15:44,234 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,238 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 8 treesize of output 1 [2021-08-12 19:15:44,239 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,243 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 10 treesize of output 1 [2021-08-12 19:15:44,244 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,248 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 9 treesize of output 1 [2021-08-12 19:15:44,249 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:44,253 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 8 treesize of output 1 [2021-08-12 19:15:44,253 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:44,459 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-08-12 19:15:44,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:44,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:15:44,465 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1321, output treesize:438 [2021-08-12 19:15:44,806 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-08-12 19:15:45,397 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6], 3=[v_prenex_386, v_prenex_384], 6=[v_prenex_383], 10=[v_prenex_385, ends_with_10, v_prenex_381]} [2021-08-12 19:15:45,403 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 3 treesize of output 1 [2021-08-12 19:15:45,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,411 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 5 treesize of output 1 [2021-08-12 19:15:45,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:45,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,748 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2021-08-12 19:15:45,748 INFO L628 ElimStorePlain]: treesize reduction 312, result has 50.8 percent of original size [2021-08-12 19:15:45,753 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 6 treesize of output 2 [2021-08-12 19:15:45,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,759 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 6 treesize of output 2 [2021-08-12 19:15:45,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,764 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 6 treesize of output 2 [2021-08-12 19:15:45,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,889 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-08-12 19:15:45,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:45,895 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 5 treesize of output 1 [2021-08-12 19:15:45,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,900 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 3 treesize of output 1 [2021-08-12 19:15:45,901 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:45,905 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 5 treesize of output 1 [2021-08-12 19:15:45,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,030 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 19:15:46,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:46,035 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 6 treesize of output 2 [2021-08-12 19:15:46,036 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,155 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-08-12 19:15:46,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:46,160 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 5 treesize of output 1 [2021-08-12 19:15:46,161 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,165 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 6 treesize of output 2 [2021-08-12 19:15:46,166 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,170 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 3 treesize of output 1 [2021-08-12 19:15:46,171 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,286 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 19:15:46,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:46,291 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 3 treesize of output 1 [2021-08-12 19:15:46,292 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,296 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 5 treesize of output 1 [2021-08-12 19:15:46,296 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,496 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-08-12 19:15:46,496 INFO L628 ElimStorePlain]: treesize reduction 34, result has 87.1 percent of original size [2021-08-12 19:15:46,501 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 3 treesize of output 1 [2021-08-12 19:15:46,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:46,605 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-08-12 19:15:46,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:46,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 7 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:15:46,609 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:692, output treesize:163 [2021-08-12 19:15:46,859 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-08-12 19:15:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770048654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:15:46,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796330146] [2021-08-12 19:15:46,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:15:46,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:46,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:15:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:15:46,986 INFO L87 Difference]: Start difference. First operand 697 states and 2376 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:47,949 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2021-08-12 19:15:48,911 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-08-12 19:15:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:49,709 INFO L93 Difference]: Finished difference Result 817 states and 2715 transitions. [2021-08-12 19:15:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:15:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:15:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:49,712 INFO L225 Difference]: With dead ends: 817 [2021-08-12 19:15:49,712 INFO L226 Difference]: Without dead ends: 785 [2021-08-12 19:15:49,713 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2087.3ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:15:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-08-12 19:15:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 701. [2021-08-12 19:15:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.4171428571428573) internal successors, (2392), 700 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2392 transitions. [2021-08-12 19:15:50,094 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2392 transitions. Word has length 20 [2021-08-12 19:15:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:50,094 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2392 transitions. [2021-08-12 19:15:50,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2392 transitions. [2021-08-12 19:15:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:50,095 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:50,095 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:50,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7523,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:15:50,297 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash 984747272, now seen corresponding path program 56 times [2021-08-12 19:15:50,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:50,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465386947] [2021-08-12 19:15:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:50,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465386947] [2021-08-12 19:15:50,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465386947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535938835] [2021-08-12 19:15:50,511 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 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 [2021-08-12 19:15:50,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:15:50,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:15:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:50,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,761 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 8 treesize of output 1 [2021-08-12 19:15:50,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,766 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 8 treesize of output 1 [2021-08-12 19:15:50,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,772 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 8 treesize of output 1 [2021-08-12 19:15:50,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,778 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 9 treesize of output 2 [2021-08-12 19:15:50,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,783 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 8 treesize of output 1 [2021-08-12 19:15:50,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,788 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 7 treesize of output 1 [2021-08-12 19:15:50,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,794 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 8 treesize of output 1 [2021-08-12 19:15:50,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,799 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 9 treesize of output 2 [2021-08-12 19:15:50,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,804 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 7 treesize of output 1 [2021-08-12 19:15:50,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,810 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 9 treesize of output 2 [2021-08-12 19:15:50,810 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,815 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 8 treesize of output 1 [2021-08-12 19:15:50,816 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,821 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 8 treesize of output 1 [2021-08-12 19:15:50,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,827 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 7 treesize of output 1 [2021-08-12 19:15:50,828 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,832 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 8 treesize of output 1 [2021-08-12 19:15:50,833 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,837 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 7 treesize of output 1 [2021-08-12 19:15:50,838 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:50,842 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:50,846 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,850 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 8 treesize of output 1 [2021-08-12 19:15:50,851 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:50,854 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,858 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 9 treesize of output 2 [2021-08-12 19:15:50,859 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:50,862 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,866 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 8 treesize of output 1 [2021-08-12 19:15:50,867 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,871 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 8 treesize of output 1 [2021-08-12 19:15:50,871 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:50,875 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 8 treesize of output 1 [2021-08-12 19:15:50,875 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:50,991 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-08-12 19:15:50,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:50,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:15:50,994 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:957, output treesize:261 [2021-08-12 19:15:51,124 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-08-12 19:15:51,458 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_389, v_prenex_390], 3=[v_prenex_388, v_prenex_387, ends_with_6, v_prenex_391], 6=[ends_with_10]} [2021-08-12 19:15:51,464 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 5 treesize of output 1 [2021-08-12 19:15:51,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:51,470 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 3 treesize of output 1 [2021-08-12 19:15:51,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:51,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:51,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:51,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:15:51,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:51,985 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 100 [2021-08-12 19:15:51,986 INFO L628 ElimStorePlain]: treesize reduction 540, result has 44.1 percent of original size [2021-08-12 19:15:51,991 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 4 treesize of output 2 [2021-08-12 19:15:51,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:51,997 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 4 treesize of output 2 [2021-08-12 19:15:51,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,206 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-08-12 19:15:52,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:52,211 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 5 treesize of output 1 [2021-08-12 19:15:52,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,217 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 3 treesize of output 1 [2021-08-12 19:15:52,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,563 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-08-12 19:15:52,564 INFO L628 ElimStorePlain]: treesize reduction 75, result has 81.7 percent of original size [2021-08-12 19:15:52,564 INFO L518 ElimStorePlain]: Eliminatee v_prenex_387 vanished before elimination [2021-08-12 19:15:52,568 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 6 treesize of output 2 [2021-08-12 19:15:52,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,575 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 6 treesize of output 2 [2021-08-12 19:15:52,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,580 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 6 treesize of output 2 [2021-08-12 19:15:52,581 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,585 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 4 treesize of output 2 [2021-08-12 19:15:52,586 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,589 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 6 treesize of output 2 [2021-08-12 19:15:52,590 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,733 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 19:15:52,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:52,737 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 5 treesize of output 1 [2021-08-12 19:15:52,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,742 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 5 treesize of output 1 [2021-08-12 19:15:52,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,876 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 19:15:52,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:52,880 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 6 treesize of output 2 [2021-08-12 19:15:52,881 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,884 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 5 treesize of output 1 [2021-08-12 19:15:52,885 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,889 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 4 treesize of output 2 [2021-08-12 19:15:52,890 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,894 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 4 treesize of output 2 [2021-08-12 19:15:52,894 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:52,898 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 5 treesize of output 1 [2021-08-12 19:15:52,899 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:53,030 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-08-12 19:15:53,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:15:53,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-08-12 19:15:53,034 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:1059, output treesize:253 [2021-08-12 19:15:53,270 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-08-12 19:15:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535938835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:15:53,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:15:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565486436] [2021-08-12 19:15:53,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:15:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:15:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:15:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:15:53,536 INFO L87 Difference]: Start difference. First operand 701 states and 2392 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:54,671 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-08-12 19:15:54,947 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-08-12 19:15:55,703 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-08-12 19:15:55,913 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-08-12 19:15:56,674 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-08-12 19:15:56,901 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-08-12 19:15:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:15:58,516 INFO L93 Difference]: Finished difference Result 1200 states and 3711 transitions. [2021-08-12 19:15:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:15:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:15:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:15:58,519 INFO L225 Difference]: With dead ends: 1200 [2021-08-12 19:15:58,519 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 19:15:58,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2404.3ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:15:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 19:15:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 703. [2021-08-12 19:15:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.4415954415954415) internal successors, (2416), 702 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:15:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2416 transitions. [2021-08-12 19:15:58,923 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2416 transitions. Word has length 20 [2021-08-12 19:15:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:15:58,923 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2416 transitions. [2021-08-12 19:15:58,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:15:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2416 transitions. [2021-08-12 19:15:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:15:58,924 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:15:58,924 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:15:59,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7672 [2021-08-12 19:15:59,125 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:15:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:15:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1048957180, now seen corresponding path program 57 times [2021-08-12 19:15:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:15:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479579951] [2021-08-12 19:15:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:15:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:15:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:15:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:15:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479579951] [2021-08-12 19:15:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479579951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:15:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349247684] [2021-08-12 19:15:59,471 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 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 [2021-08-12 19:15:59,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:15:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:15:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:15:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:15:59,968 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_397, ends_with_2], 15=[v_prenex_395]} [2021-08-12 19:15:59,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:59,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:59,985 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 10 treesize of output 1 [2021-08-12 19:15:59,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:15:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:15:59,994 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 8 treesize of output 1 [2021-08-12 19:15:59,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:00,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:00,002 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 7 treesize of output 1 [2021-08-12 19:16:00,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:00,010 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 9 treesize of output 1 [2021-08-12 19:16:00,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,459 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 107 [2021-08-12 19:16:00,459 INFO L628 ElimStorePlain]: treesize reduction 366, result has 52.2 percent of original size [2021-08-12 19:16:00,465 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 5 treesize of output 1 [2021-08-12 19:16:00,466 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,471 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 3 treesize of output 1 [2021-08-12 19:16:00,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,666 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-08-12 19:16:00,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:00,672 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 6 treesize of output 2 [2021-08-12 19:16:00,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,678 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 6 treesize of output 2 [2021-08-12 19:16:00,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,683 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 6 treesize of output 2 [2021-08-12 19:16:00,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,688 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 4 treesize of output 2 [2021-08-12 19:16:00,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:00,869 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-08-12 19:16:00,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:00,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-08-12 19:16:00,881 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:885, output treesize:369 [2021-08-12 19:16:01,067 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-08-12 19:16:01,391 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2021-08-12 19:16:02,834 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_410, v_prenex_412, v_prenex_411, ends_with_10, v_prenex_403, ends_with_6, v_prenex_405, v_prenex_404, v_prenex_407, v_prenex_406, v_prenex_409, v_prenex_408], 15=[v_prenex_413], 21=[v_prenex_415]} [2021-08-12 19:16:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:02,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:02,845 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 9 treesize of output 1 [2021-08-12 19:16:02,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:02,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:02,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:03,349 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 114 [2021-08-12 19:16:03,350 INFO L628 ElimStorePlain]: treesize reduction 1292, result has 19.7 percent of original size [2021-08-12 19:16:03,354 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 3 treesize of output 1 [2021-08-12 19:16:03,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:03,488 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 19:16:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:03,493 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 3 treesize of output 1 [2021-08-12 19:16:03,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:03,619 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:16:03,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:03,620 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-08-12 19:16:03,620 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-08-12 19:16:03,620 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-08-12 19:16:03,624 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 6 treesize of output 2 [2021-08-12 19:16:03,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:03,761 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 19:16:03,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:03,761 INFO L518 ElimStorePlain]: Eliminatee v_prenex_404 vanished before elimination [2021-08-12 19:16:03,761 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-08-12 19:16:03,767 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 3 treesize of output 1 [2021-08-12 19:16:03,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:03,891 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:16:03,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:03,896 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 5 treesize of output 1 [2021-08-12 19:16:03,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,016 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-08-12 19:16:04,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:04,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-08-12 19:16:04,021 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 5 treesize of output 1 [2021-08-12 19:16:04,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,026 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 6 treesize of output 2 [2021-08-12 19:16:04,027 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,031 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 3 treesize of output 1 [2021-08-12 19:16:04,032 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,036 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 4 treesize of output 2 [2021-08-12 19:16:04,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,152 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-08-12 19:16:04,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:04,158 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 4 treesize of output 2 [2021-08-12 19:16:04,159 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,163 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 6 treesize of output 2 [2021-08-12 19:16:04,163 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,168 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 6 treesize of output 2 [2021-08-12 19:16:04,168 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,172 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 4 treesize of output 2 [2021-08-12 19:16:04,173 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:04,277 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-08-12 19:16:04,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:04,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 14 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-08-12 19:16:04,280 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 25 variables, input treesize:1669, output treesize:200 [2021-08-12 19:16:04,441 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-08-12 19:16:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:04,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349247684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:04,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:04,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:16:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571723664] [2021-08-12 19:16:04,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:16:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:16:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:16:04,635 INFO L87 Difference]: Start difference. First operand 703 states and 2416 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:05,525 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 106 [2021-08-12 19:16:06,516 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-08-12 19:16:06,741 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-08-12 19:16:07,305 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-08-12 19:16:07,508 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-08-12 19:16:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:08,222 INFO L93 Difference]: Finished difference Result 914 states and 2966 transitions. [2021-08-12 19:16:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:16:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:16:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:08,225 INFO L225 Difference]: With dead ends: 914 [2021-08-12 19:16:08,225 INFO L226 Difference]: Without dead ends: 852 [2021-08-12 19:16:08,225 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2392.3ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:16:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-12 19:16:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 712. [2021-08-12 19:16:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.4430379746835444) internal successors, (2448), 711 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2448 transitions. [2021-08-12 19:16:08,620 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2448 transitions. Word has length 20 [2021-08-12 19:16:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:08,620 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2448 transitions. [2021-08-12 19:16:08,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2448 transitions. [2021-08-12 19:16:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:08,621 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:08,621 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:08,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7783 [2021-08-12 19:16:08,822 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:08,822 INFO L82 PathProgramCache]: Analyzing trace with hash 136124800, now seen corresponding path program 58 times [2021-08-12 19:16:08,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:08,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109353141] [2021-08-12 19:16:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:09,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109353141] [2021-08-12 19:16:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109353141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621162669] [2021-08-12 19:16:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:16:09,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:16:09,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:09,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:16:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:09,287 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-08-12 19:16:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,619 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 10 treesize of output 1 [2021-08-12 19:16:09,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:09,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,626 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 7 treesize of output 1 [2021-08-12 19:16:09,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:09,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,633 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 8 treesize of output 1 [2021-08-12 19:16:09,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:09,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,640 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 9 treesize of output 1 [2021-08-12 19:16:09,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:09,648 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 10 treesize of output 1 [2021-08-12 19:16:09,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,207 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2021-08-12 19:16:10,207 INFO L628 ElimStorePlain]: treesize reduction 446, result has 53.3 percent of original size [2021-08-12 19:16:10,212 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 4 treesize of output 2 [2021-08-12 19:16:10,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,218 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 4 treesize of output 2 [2021-08-12 19:16:10,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,223 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 4 treesize of output 2 [2021-08-12 19:16:10,224 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,458 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 19:16:10,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:10,463 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 6 treesize of output 2 [2021-08-12 19:16:10,464 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,469 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 6 treesize of output 2 [2021-08-12 19:16:10,470 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,474 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 4 treesize of output 2 [2021-08-12 19:16:10,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,701 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:16:10,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:10,706 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 5 treesize of output 1 [2021-08-12 19:16:10,707 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,712 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 5 treesize of output 1 [2021-08-12 19:16:10,712 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:10,944 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-08-12 19:16:10,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:10,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:16:10,957 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:1131, output treesize:471 [2021-08-12 19:16:11,326 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2021-08-12 19:16:13,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,216 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 10 treesize of output 1 [2021-08-12 19:16:13,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:13,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,229 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 9 treesize of output 2 [2021-08-12 19:16:13,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:13,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:13,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:13,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:13,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:16:13,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:13,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:13,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:14,109 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 158 [2021-08-12 19:16:14,109 INFO L628 ElimStorePlain]: treesize reduction 1763, result has 22.7 percent of original size [2021-08-12 19:16:14,116 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 4 treesize of output 2 [2021-08-12 19:16:14,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:14,123 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 6 treesize of output 2 [2021-08-12 19:16:14,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:14,350 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-08-12 19:16:14,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:14,357 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 5 treesize of output 1 [2021-08-12 19:16:14,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:14,588 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-08-12 19:16:14,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:14,594 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 5 treesize of output 1 [2021-08-12 19:16:14,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:14,822 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-08-12 19:16:14,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:14,834 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 3 treesize of output 1 [2021-08-12 19:16:14,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:15,062 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-08-12 19:16:15,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:15,069 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 3 treesize of output 1 [2021-08-12 19:16:15,070 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:15,293 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-08-12 19:16:15,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:15,300 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 6 treesize of output 2 [2021-08-12 19:16:15,301 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:15,535 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-08-12 19:16:15,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:15,542 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 3 treesize of output 1 [2021-08-12 19:16:15,543 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:15,763 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 19:16:15,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:15,770 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 5 treesize of output 1 [2021-08-12 19:16:15,770 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:15,993 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-08-12 19:16:15,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:15,999 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 5 treesize of output 1 [2021-08-12 19:16:16,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:16,212 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-08-12 19:16:16,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:16,218 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 3 treesize of output 1 [2021-08-12 19:16:16,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:16,436 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-08-12 19:16:16,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:16,442 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 6 treesize of output 2 [2021-08-12 19:16:16,443 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:16,652 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 19:16:16,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:16,658 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 6 treesize of output 2 [2021-08-12 19:16:16,659 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:16,665 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 6 treesize of output 2 [2021-08-12 19:16:16,666 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:16,869 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-08-12 19:16:16,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:16,875 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 4 treesize of output 2 [2021-08-12 19:16:16,876 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:17,075 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 19:16:17,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:17,081 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 4 treesize of output 2 [2021-08-12 19:16:17,082 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:17,279 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-08-12 19:16:17,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:17,285 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 6 treesize of output 2 [2021-08-12 19:16:17,286 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:17,291 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 6 treesize of output 2 [2021-08-12 19:16:17,292 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:17,483 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-08-12 19:16:17,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:17,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-08-12 19:16:17,493 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 25 variables, input treesize:2477, output treesize:339 [2021-08-12 19:16:17,759 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-08-12 19:16:17,947 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-08-12 19:16:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:18,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621162669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:18,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:18,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:16:18,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952032595] [2021-08-12 19:16:18,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:16:18,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:16:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:16:18,142 INFO L87 Difference]: Start difference. First operand 712 states and 2448 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:19,058 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-08-12 19:16:19,351 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-08-12 19:16:19,960 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-08-12 19:16:20,207 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-08-12 19:16:20,890 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-08-12 19:16:21,150 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-08-12 19:16:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:22,081 INFO L93 Difference]: Finished difference Result 982 states and 3169 transitions. [2021-08-12 19:16:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:16:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:16:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:22,084 INFO L225 Difference]: With dead ends: 982 [2021-08-12 19:16:22,084 INFO L226 Difference]: Without dead ends: 905 [2021-08-12 19:16:22,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2700.1ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:16:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-08-12 19:16:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 708. [2021-08-12 19:16:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.43988684582744) internal successors, (2432), 707 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2432 transitions. [2021-08-12 19:16:22,484 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2432 transitions. Word has length 20 [2021-08-12 19:16:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:22,484 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2432 transitions. [2021-08-12 19:16:22,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2432 transitions. [2021-08-12 19:16:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:22,485 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:22,485 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:22,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8051 [2021-08-12 19:16:22,686 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -821811394, now seen corresponding path program 59 times [2021-08-12 19:16:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:22,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211326443] [2021-08-12 19:16:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:22,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211326443] [2021-08-12 19:16:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211326443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531736591] [2021-08-12 19:16:22,989 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 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 [2021-08-12 19:16:23,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:23,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:16:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:23,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531736591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:23,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:23,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:16:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169082250] [2021-08-12 19:16:23,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:16:23,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:23,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:16:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:16:23,490 INFO L87 Difference]: Start difference. First operand 708 states and 2432 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:16:24,562 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-08-12 19:16:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:25,625 INFO L93 Difference]: Finished difference Result 774 states and 2611 transitions. [2021-08-12 19:16:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:16:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:16:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:25,628 INFO L225 Difference]: With dead ends: 774 [2021-08-12 19:16:25,628 INFO L226 Difference]: Without dead ends: 757 [2021-08-12 19:16:25,628 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:16:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-08-12 19:16:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 706. [2021-08-12 19:16:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.4397163120567376) internal successors, (2425), 705 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2425 transitions. [2021-08-12 19:16:26,021 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2425 transitions. Word has length 20 [2021-08-12 19:16:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:26,021 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2425 transitions. [2021-08-12 19:16:26,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:16:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2425 transitions. [2021-08-12 19:16:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:26,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:26,022 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:26,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8770,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:16:26,223 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash -100687916, now seen corresponding path program 60 times [2021-08-12 19:16:26,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:26,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101249305] [2021-08-12 19:16:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:26,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:26,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101249305] [2021-08-12 19:16:26,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101249305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:26,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810652358] [2021-08-12 19:16:26,492 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 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 [2021-08-12 19:16:26,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:16:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:26,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:16:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:26,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:26,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,965 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 8 treesize of output 1 [2021-08-12 19:16:26,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,970 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 8 treesize of output 1 [2021-08-12 19:16:26,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,974 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 4 treesize of output 2 [2021-08-12 19:16:26,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:26,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:16:26,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,990 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 10 treesize of output 1 [2021-08-12 19:16:26,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:26,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:26,995 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 8 treesize of output 1 [2021-08-12 19:16:26,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,000 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 6 treesize of output 2 [2021-08-12 19:16:27,001 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:27,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,009 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 8 treesize of output 1 [2021-08-12 19:16:27,009 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:16:27,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,019 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 9 treesize of output 2 [2021-08-12 19:16:27,020 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,024 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 7 treesize of output 1 [2021-08-12 19:16:27,025 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:27,029 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:27,033 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:27,037 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 9 treesize of output 2 [2021-08-12 19:16:27,038 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:27,041 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:27,045 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,048 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 3 treesize of output 1 [2021-08-12 19:16:27,049 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:27,299 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-08-12 19:16:27,300 INFO L628 ElimStorePlain]: treesize reduction 156, result has 64.9 percent of original size [2021-08-12 19:16:27,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 9 xjuncts. [2021-08-12 19:16:27,304 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:1011, output treesize:283 [2021-08-12 19:16:27,519 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-08-12 19:16:28,669 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_447], 6=[ends_with_2], 10=[v_prenex_449], 21=[ends_with_6]} [2021-08-12 19:16:28,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,678 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 7 treesize of output 1 [2021-08-12 19:16:28,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:28,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,695 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 8 treesize of output 1 [2021-08-12 19:16:28,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:28,703 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 8 treesize of output 1 [2021-08-12 19:16:28,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,712 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 3 treesize of output 1 [2021-08-12 19:16:28,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:28,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:28,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:28,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,388 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 120 [2021-08-12 19:16:29,389 INFO L628 ElimStorePlain]: treesize reduction 699, result has 48.6 percent of original size [2021-08-12 19:16:29,394 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 5 treesize of output 1 [2021-08-12 19:16:29,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,400 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 4 treesize of output 2 [2021-08-12 19:16:29,400 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,405 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 6 treesize of output 2 [2021-08-12 19:16:29,406 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,411 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 4 treesize of output 2 [2021-08-12 19:16:29,412 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,417 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 5 treesize of output 1 [2021-08-12 19:16:29,417 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,422 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 6 treesize of output 2 [2021-08-12 19:16:29,423 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,428 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 4 treesize of output 2 [2021-08-12 19:16:29,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,434 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 4 treesize of output 2 [2021-08-12 19:16:29,434 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,439 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 4 treesize of output 2 [2021-08-12 19:16:29,440 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,445 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 4 treesize of output 2 [2021-08-12 19:16:29,446 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,451 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 4 treesize of output 2 [2021-08-12 19:16:29,452 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,458 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 4 treesize of output 2 [2021-08-12 19:16:29,459 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,464 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 4 treesize of output 2 [2021-08-12 19:16:29,464 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,470 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 4 treesize of output 2 [2021-08-12 19:16:29,470 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,475 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 5 treesize of output 1 [2021-08-12 19:16:29,476 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,729 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 19:16:29,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:29,735 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 3 treesize of output 1 [2021-08-12 19:16:29,736 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,740 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 3 treesize of output 1 [2021-08-12 19:16:29,741 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,987 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-08-12 19:16:29,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:29,993 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 6 treesize of output 2 [2021-08-12 19:16:29,994 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:29,999 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 4 treesize of output 2 [2021-08-12 19:16:30,000 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,006 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 4 treesize of output 2 [2021-08-12 19:16:30,007 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,012 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 6 treesize of output 2 [2021-08-12 19:16:30,013 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-08-12 19:16:30,018 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,023 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 5 treesize of output 1 [2021-08-12 19:16:30,024 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,029 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 6 treesize of output 2 [2021-08-12 19:16:30,029 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,034 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 6 treesize of output 2 [2021-08-12 19:16:30,035 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,040 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 4 treesize of output 2 [2021-08-12 19:16:30,041 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,045 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 5 treesize of output 1 [2021-08-12 19:16:30,046 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,051 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 4 treesize of output 2 [2021-08-12 19:16:30,052 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,056 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 6 treesize of output 2 [2021-08-12 19:16:30,057 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,062 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 4 treesize of output 2 [2021-08-12 19:16:30,063 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,068 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 6 treesize of output 2 [2021-08-12 19:16:30,069 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,073 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 4 treesize of output 2 [2021-08-12 19:16:30,074 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:30,477 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-08-12 19:16:30,478 INFO L628 ElimStorePlain]: treesize reduction 57, result has 88.9 percent of original size [2021-08-12 19:16:30,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 4 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-08-12 19:16:30,484 INFO L247 ElimStorePlain]: Needed 40 recursive calls to eliminate 11 variables, input treesize:1575, output treesize:355 [2021-08-12 19:16:30,672 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-08-12 19:16:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:30,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810652358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:30,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:30,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:16:30,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481831822] [2021-08-12 19:16:30,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:16:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:16:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:16:30,841 INFO L87 Difference]: Start difference. First operand 706 states and 2425 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:16:31,696 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-08-12 19:16:32,237 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-08-12 19:16:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:33,604 INFO L93 Difference]: Finished difference Result 891 states and 2956 transitions. [2021-08-12 19:16:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:16:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:16:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:33,607 INFO L225 Difference]: With dead ends: 891 [2021-08-12 19:16:33,607 INFO L226 Difference]: Without dead ends: 874 [2021-08-12 19:16:33,607 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1474.2ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:16:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-12 19:16:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 704. [2021-08-12 19:16:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.4423897581792318) internal successors, (2420), 703 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2420 transitions. [2021-08-12 19:16:34,018 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2420 transitions. Word has length 20 [2021-08-12 19:16:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:34,019 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2420 transitions. [2021-08-12 19:16:34,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:16:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2420 transitions. [2021-08-12 19:16:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:34,020 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:34,020 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:34,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8794 [2021-08-12 19:16:34,220 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:34,220 INFO L82 PathProgramCache]: Analyzing trace with hash 206234836, now seen corresponding path program 61 times [2021-08-12 19:16:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:34,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380751094] [2021-08-12 19:16:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:34,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:34,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380751094] [2021-08-12 19:16:34,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380751094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:34,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053017762] [2021-08-12 19:16:34,415 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 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 [2021-08-12 19:16:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:16:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:34,844 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 8 treesize of output 1 [2021-08-12 19:16:34,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:34,851 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 4 treesize of output 2 [2021-08-12 19:16:34,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:34,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:34,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:34,859 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 9 treesize of output 2 [2021-08-12 19:16:34,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:34,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:16:34,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,389 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 121 [2021-08-12 19:16:35,390 INFO L628 ElimStorePlain]: treesize reduction 316, result has 62.8 percent of original size [2021-08-12 19:16:35,396 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 5 treesize of output 1 [2021-08-12 19:16:35,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,402 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 3 treesize of output 1 [2021-08-12 19:16:35,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,652 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-08-12 19:16:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:35,657 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 3 treesize of output 1 [2021-08-12 19:16:35,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,662 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 3 treesize of output 1 [2021-08-12 19:16:35,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,888 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-08-12 19:16:35,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:35,893 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 6 treesize of output 2 [2021-08-12 19:16:35,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,899 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 6 treesize of output 2 [2021-08-12 19:16:35,899 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:35,904 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 4 treesize of output 2 [2021-08-12 19:16:35,905 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:36,124 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-08-12 19:16:36,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:36,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-08-12 19:16:36,139 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:925, output treesize:503 [2021-08-12 19:16:36,483 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 140 [2021-08-12 19:16:38,787 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_474, v_prenex_462, v_prenex_470, v_prenex_461], 3=[ends_with_2, ends_with_6, v_prenex_463, v_prenex_473, v_prenex_465, v_prenex_476, v_prenex_464, v_prenex_475, v_prenex_467, v_prenex_466, v_prenex_469, v_prenex_468, v_prenex_472, v_prenex_471], 21=[v_prenex_484], 28=[v_prenex_482]} [2021-08-12 19:16:38,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:38,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:39,907 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 343 DAG size of output: 172 [2021-08-12 19:16:39,908 INFO L628 ElimStorePlain]: treesize reduction 1771, result has 28.4 percent of original size [2021-08-12 19:16:39,908 INFO L518 ElimStorePlain]: Eliminatee v_prenex_462 vanished before elimination [2021-08-12 19:16:39,915 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 6 treesize of output 2 [2021-08-12 19:16:39,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:40,244 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-08-12 19:16:40,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:40,251 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 3 treesize of output 1 [2021-08-12 19:16:40,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:40,575 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-08-12 19:16:40,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:40,582 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 5 treesize of output 1 [2021-08-12 19:16:40,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:40,897 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-08-12 19:16:40,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:40,904 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 6 treesize of output 2 [2021-08-12 19:16:40,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:41,219 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-08-12 19:16:41,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:41,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_463 vanished before elimination [2021-08-12 19:16:41,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_473 vanished before elimination [2021-08-12 19:16:41,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-08-12 19:16:41,227 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 4 treesize of output 2 [2021-08-12 19:16:41,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:41,543 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-08-12 19:16:41,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:41,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_464 vanished before elimination [2021-08-12 19:16:41,550 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 5 treesize of output 1 [2021-08-12 19:16:41,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:41,858 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-08-12 19:16:41,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:41,864 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 3 treesize of output 1 [2021-08-12 19:16:41,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,168 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-08-12 19:16:42,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:42,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-08-12 19:16:42,175 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 3 treesize of output 1 [2021-08-12 19:16:42,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,182 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 5 treesize of output 1 [2021-08-12 19:16:42,182 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,490 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-08-12 19:16:42,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:42,497 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 3 treesize of output 1 [2021-08-12 19:16:42,498 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,807 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-08-12 19:16:42,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:42,807 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-08-12 19:16:42,807 INFO L518 ElimStorePlain]: Eliminatee v_prenex_471 vanished before elimination [2021-08-12 19:16:42,814 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 4 treesize of output 2 [2021-08-12 19:16:42,815 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,822 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 4 treesize of output 2 [2021-08-12 19:16:42,822 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,829 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 4 treesize of output 2 [2021-08-12 19:16:42,830 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,837 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 4 treesize of output 2 [2021-08-12 19:16:42,839 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,845 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 5 treesize of output 1 [2021-08-12 19:16:42,846 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,853 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 6 treesize of output 2 [2021-08-12 19:16:42,853 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,859 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 3 treesize of output 1 [2021-08-12 19:16:42,860 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:42,867 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 6 treesize of output 2 [2021-08-12 19:16:42,867 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,389 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2021-08-12 19:16:43,390 INFO L628 ElimStorePlain]: treesize reduction 51, result has 91.8 percent of original size [2021-08-12 19:16:43,396 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 4 treesize of output 2 [2021-08-12 19:16:43,397 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,403 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 4 treesize of output 2 [2021-08-12 19:16:43,404 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,411 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 4 treesize of output 2 [2021-08-12 19:16:43,412 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,418 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 6 treesize of output 2 [2021-08-12 19:16:43,419 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,425 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 6 treesize of output 2 [2021-08-12 19:16:43,426 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,433 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 6 treesize of output 2 [2021-08-12 19:16:43,433 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-08-12 19:16:43,441 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:43,681 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-08-12 19:16:43,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:43,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-08-12 19:16:43,689 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 37 variables, input treesize:2532, output treesize:451 [2021-08-12 19:16:43,954 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-08-12 19:16:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:44,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053017762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:44,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:44,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:16:44,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59415357] [2021-08-12 19:16:44,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:16:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:16:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:16:44,236 INFO L87 Difference]: Start difference. First operand 704 states and 2420 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:45,296 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-08-12 19:16:45,571 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-08-12 19:16:46,158 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-08-12 19:16:46,511 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-08-12 19:16:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:47,482 INFO L93 Difference]: Finished difference Result 871 states and 2880 transitions. [2021-08-12 19:16:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:16:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:16:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:47,485 INFO L225 Difference]: With dead ends: 871 [2021-08-12 19:16:47,485 INFO L226 Difference]: Without dead ends: 824 [2021-08-12 19:16:47,486 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2238.2ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:16:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-08-12 19:16:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 703. [2021-08-12 19:16:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.4415954415954415) internal successors, (2416), 702 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2416 transitions. [2021-08-12 19:16:47,886 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2416 transitions. Word has length 20 [2021-08-12 19:16:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:47,886 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2416 transitions. [2021-08-12 19:16:47,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2416 transitions. [2021-08-12 19:16:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:47,887 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:47,887 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:48,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9185 [2021-08-12 19:16:48,088 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash 623244032, now seen corresponding path program 62 times [2021-08-12 19:16:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:48,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893835241] [2021-08-12 19:16:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:48,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893835241] [2021-08-12 19:16:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893835241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098896103] [2021-08-12 19:16:48,291 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 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 [2021-08-12 19:16:48,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:16:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:16:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:48,548 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 5 treesize of output 1 [2021-08-12 19:16:48,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,553 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 5 treesize of output 1 [2021-08-12 19:16:48,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,558 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 6 treesize of output 2 [2021-08-12 19:16:48,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,563 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 5 treesize of output 1 [2021-08-12 19:16:48,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,567 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 3 treesize of output 1 [2021-08-12 19:16:48,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,572 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 6 treesize of output 2 [2021-08-12 19:16:48,573 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:48,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,582 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 6 treesize of output 2 [2021-08-12 19:16:48,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,587 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 6 treesize of output 2 [2021-08-12 19:16:48,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:48,592 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,596 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 4 treesize of output 2 [2021-08-12 19:16:48,597 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,601 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 6 treesize of output 2 [2021-08-12 19:16:48,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,606 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 6 treesize of output 2 [2021-08-12 19:16:48,607 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:48,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:48,889 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-08-12 19:16:48,889 INFO L628 ElimStorePlain]: treesize reduction 70, result has 82.1 percent of original size [2021-08-12 19:16:48,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-08-12 19:16:48,893 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:578, output treesize:322 [2021-08-12 19:16:49,166 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-08-12 19:16:50,544 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, v_prenex_515, v_prenex_514, v_prenex_517, v_prenex_516, v_prenex_500, v_prenex_489, v_prenex_488, v_prenex_524, v_prenex_502, v_prenex_523, v_prenex_501, ends_with_2, v_prenex_504, v_prenex_526, v_prenex_503, v_prenex_506, v_prenex_505, v_prenex_508, v_prenex_507, v_prenex_509, v_prenex_496, v_prenex_495, v_prenex_498, v_prenex_497, v_prenex_511, v_prenex_499, v_prenex_510, v_prenex_512, v_prenex_490, v_prenex_492, v_prenex_491, v_prenex_494, v_prenex_493], 15=[v_prenex_520], 21=[v_prenex_521]} [2021-08-12 19:16:50,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:50,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:50,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:50,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,027 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 107 [2021-08-12 19:16:51,028 INFO L628 ElimStorePlain]: treesize reduction 1062, result has 23.4 percent of original size [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_515 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_514 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_517 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_500 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_489 vanished before elimination [2021-08-12 19:16:51,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-08-12 19:16:51,034 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 4 treesize of output 2 [2021-08-12 19:16:51,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,170 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-08-12 19:16:51,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:51,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-08-12 19:16:51,176 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 4 treesize of output 2 [2021-08-12 19:16:51,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,314 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 19:16:51,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:51,314 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-08-12 19:16:51,314 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-08-12 19:16:51,319 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 3 treesize of output 1 [2021-08-12 19:16:51,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,446 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-08-12 19:16:51,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:51,447 INFO L518 ElimStorePlain]: Eliminatee v_prenex_526 vanished before elimination [2021-08-12 19:16:51,447 INFO L518 ElimStorePlain]: Eliminatee v_prenex_503 vanished before elimination [2021-08-12 19:16:51,452 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 5 treesize of output 1 [2021-08-12 19:16:51,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,680 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-08-12 19:16:51,681 INFO L628 ElimStorePlain]: treesize reduction 34, result has 89.0 percent of original size [2021-08-12 19:16:51,685 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 3 treesize of output 1 [2021-08-12 19:16:51,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:51,810 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-08-12 19:16:51,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:51,811 INFO L518 ElimStorePlain]: Eliminatee v_prenex_508 vanished before elimination [2021-08-12 19:16:51,816 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 6 treesize of output 2 [2021-08-12 19:16:51,817 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,035 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-08-12 19:16:52,035 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-08-12 19:16:52,035 INFO L518 ElimStorePlain]: Eliminatee v_prenex_509 vanished before elimination [2021-08-12 19:16:52,039 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 4 treesize of output 2 [2021-08-12 19:16:52,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,150 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-08-12 19:16:52,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_495 vanished before elimination [2021-08-12 19:16:52,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_498 vanished before elimination [2021-08-12 19:16:52,155 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 5 treesize of output 1 [2021-08-12 19:16:52,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-08-12 19:16:52,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_511 vanished before elimination [2021-08-12 19:16:52,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-08-12 19:16:52,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-08-12 19:16:52,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_512 vanished before elimination [2021-08-12 19:16:52,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_490 vanished before elimination [2021-08-12 19:16:52,265 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 6 treesize of output 2 [2021-08-12 19:16:52,266 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,368 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 19:16:52,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,372 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 6 treesize of output 2 [2021-08-12 19:16:52,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_494 vanished before elimination [2021-08-12 19:16:52,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-08-12 19:16:52,477 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 6 treesize of output 2 [2021-08-12 19:16:52,478 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,481 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 6 treesize of output 2 [2021-08-12 19:16:52,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,580 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 5 treesize of output 1 [2021-08-12 19:16:52,581 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,584 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 5 treesize of output 1 [2021-08-12 19:16:52,584 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:52,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:52,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 36 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:16:52,681 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 43 variables, input treesize:1480, output treesize:202 [2021-08-12 19:16:52,845 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-08-12 19:16:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098896103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:53,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:16:53,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:16:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090098692] [2021-08-12 19:16:53,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:16:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:16:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:16:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:16:53,116 INFO L87 Difference]: Start difference. First operand 703 states and 2416 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:16:54,114 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-08-12 19:16:55,532 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-08-12 19:16:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:16:55,546 INFO L93 Difference]: Finished difference Result 843 states and 2804 transitions. [2021-08-12 19:16:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:16:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:16:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:16:55,548 INFO L225 Difference]: With dead ends: 843 [2021-08-12 19:16:55,549 INFO L226 Difference]: Without dead ends: 826 [2021-08-12 19:16:55,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1436.9ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:16:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-12 19:16:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 709. [2021-08-12 19:16:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.4420903954802258) internal successors, (2437), 708 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:16:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2437 transitions. [2021-08-12 19:16:55,952 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2437 transitions. Word has length 20 [2021-08-12 19:16:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:16:55,953 INFO L482 AbstractCegarLoop]: Abstraction has 709 states and 2437 transitions. [2021-08-12 19:16:55,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:16:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2437 transitions. [2021-08-12 19:16:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:16:55,954 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:16:55,954 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:16:56,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9500 [2021-08-12 19:16:56,154 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:16:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:16:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -888775412, now seen corresponding path program 63 times [2021-08-12 19:16:56,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:16:56,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169202342] [2021-08-12 19:16:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:16:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:16:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:16:56,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:16:56,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169202342] [2021-08-12 19:16:56,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169202342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:16:56,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454375631] [2021-08-12 19:16:56,503 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 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 [2021-08-12 19:16:56,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:16:56,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:16:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:16:56,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:16:56,736 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 5 treesize of output 1 [2021-08-12 19:16:56,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,742 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 6 treesize of output 2 [2021-08-12 19:16:56,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:16:56,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,751 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 6 treesize of output 2 [2021-08-12 19:16:56,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,756 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 6 treesize of output 2 [2021-08-12 19:16:56,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,761 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 6 treesize of output 2 [2021-08-12 19:16:56,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,766 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 3 treesize of output 1 [2021-08-12 19:16:56,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,771 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 5 treesize of output 1 [2021-08-12 19:16:56,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,776 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 5 treesize of output 1 [2021-08-12 19:16:56,777 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,781 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 4 treesize of output 2 [2021-08-12 19:16:56,782 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:56,960 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 19:16:56,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:56,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-08-12 19:16:56,965 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:520, output treesize:416 [2021-08-12 19:16:57,318 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2021-08-12 19:16:58,558 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_537, v_prenex_536, v_prenex_528, v_prenex_539, v_prenex_538, v_prenex_529, v_prenex_540, v_prenex_531, v_prenex_530, v_prenex_533, v_prenex_544, v_prenex_532, v_prenex_543, v_prenex_535, v_prenex_534], 10=[ends_with_2, ends_with_10], 15=[v_prenex_541]} [2021-08-12 19:16:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:58,568 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 10 treesize of output 1 [2021-08-12 19:16:58,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:58,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:16:58,576 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 13 treesize of output 2 [2021-08-12 19:16:58,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:58,926 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 96 [2021-08-12 19:16:58,927 INFO L628 ElimStorePlain]: treesize reduction 895, result has 23.2 percent of original size [2021-08-12 19:16:58,931 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 5 treesize of output 1 [2021-08-12 19:16:58,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,034 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-08-12 19:16:59,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-08-12 19:16:59,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-08-12 19:16:59,035 INFO L518 ElimStorePlain]: Eliminatee v_prenex_538 vanished before elimination [2021-08-12 19:16:59,039 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 5 treesize of output 1 [2021-08-12 19:16:59,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-08-12 19:16:59,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,150 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 3 treesize of output 1 [2021-08-12 19:16:59,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,251 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-08-12 19:16:59,256 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 6 treesize of output 2 [2021-08-12 19:16:59,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,360 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 5 treesize of output 1 [2021-08-12 19:16:59,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,463 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 3 treesize of output 1 [2021-08-12 19:16:59,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,565 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-08-12 19:16:59,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,569 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 3 treesize of output 1 [2021-08-12 19:16:59,570 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,729 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-08-12 19:16:59,730 INFO L628 ElimStorePlain]: treesize reduction 38, result has 84.2 percent of original size [2021-08-12 19:16:59,734 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 3 treesize of output 1 [2021-08-12 19:16:59,734 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_535 vanished before elimination [2021-08-12 19:16:59,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_534 vanished before elimination [2021-08-12 19:16:59,818 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 6 treesize of output 2 [2021-08-12 19:16:59,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,896 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 4 treesize of output 2 [2021-08-12 19:16:59,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:16:59,969 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 5 treesize of output 1 [2021-08-12 19:16:59,970 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:16:59,973 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 3 treesize of output 1 [2021-08-12 19:16:59,974 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:00,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:00,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 18 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 19:17:00,041 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 22 variables, input treesize:1227, output treesize:115 [2021-08-12 19:17:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454375631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:00,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:00,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:17:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638270610] [2021-08-12 19:17:00,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:17:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:17:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:00,212 INFO L87 Difference]: Start difference. First operand 709 states and 2437 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:01,107 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2021-08-12 19:17:01,544 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-08-12 19:17:02,255 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2021-08-12 19:17:02,811 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-08-12 19:17:03,886 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-08-12 19:17:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:04,755 INFO L93 Difference]: Finished difference Result 886 states and 2891 transitions. [2021-08-12 19:17:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:17:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:17:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:04,758 INFO L225 Difference]: With dead ends: 886 [2021-08-12 19:17:04,758 INFO L226 Difference]: Without dead ends: 839 [2021-08-12 19:17:04,758 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3153.6ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:17:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-08-12 19:17:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 708. [2021-08-12 19:17:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.442715700141443) internal successors, (2434), 707 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2434 transitions. [2021-08-12 19:17:05,175 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2434 transitions. Word has length 20 [2021-08-12 19:17:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:05,176 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2434 transitions. [2021-08-12 19:17:05,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2434 transitions. [2021-08-12 19:17:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:05,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:05,177 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:05,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9701,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:05,377 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1645801780, now seen corresponding path program 64 times [2021-08-12 19:17:05,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:05,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268634313] [2021-08-12 19:17:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:05,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268634313] [2021-08-12 19:17:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268634313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964126423] [2021-08-12 19:17:05,626 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 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 [2021-08-12 19:17:05,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:06,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964126423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:06,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:06,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:17:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665883209] [2021-08-12 19:17:06,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:17:06,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:17:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:17:06,109 INFO L87 Difference]: Start difference. First operand 708 states and 2434 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:06,669 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-08-12 19:17:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:08,177 INFO L93 Difference]: Finished difference Result 783 states and 2624 transitions. [2021-08-12 19:17:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:17:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:17:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:08,180 INFO L225 Difference]: With dead ends: 783 [2021-08-12 19:17:08,180 INFO L226 Difference]: Without dead ends: 766 [2021-08-12 19:17:08,180 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-12 19:17:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 708. [2021-08-12 19:17:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.442715700141443) internal successors, (2434), 707 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2434 transitions. [2021-08-12 19:17:08,602 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2434 transitions. Word has length 20 [2021-08-12 19:17:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:08,602 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2434 transitions. [2021-08-12 19:17:08,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2434 transitions. [2021-08-12 19:17:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:08,603 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:08,603 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:08,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10026 [2021-08-12 19:17:08,804 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1066698872, now seen corresponding path program 65 times [2021-08-12 19:17:08,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:08,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418887655] [2021-08-12 19:17:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:09,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:09,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418887655] [2021-08-12 19:17:09,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418887655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:09,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879391914] [2021-08-12 19:17:09,089 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 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 [2021-08-12 19:17:09,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:17:09,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:17:09,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:09,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879391914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:17:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676757188] [2021-08-12 19:17:09,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:17:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:17:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:17:09,590 INFO L87 Difference]: Start difference. First operand 708 states and 2434 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:17:10,198 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-08-12 19:17:11,066 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-08-12 19:17:11,641 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-08-12 19:17:11,861 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-08-12 19:17:12,498 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-08-12 19:17:12,667 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-08-12 19:17:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:13,633 INFO L93 Difference]: Finished difference Result 997 states and 3207 transitions. [2021-08-12 19:17:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:17:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:17:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:13,636 INFO L225 Difference]: With dead ends: 997 [2021-08-12 19:17:13,636 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 19:17:13,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:17:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 19:17:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 714. [2021-08-12 19:17:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.4488078541374474) internal successors, (2459), 713 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2459 transitions. [2021-08-12 19:17:14,060 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2459 transitions. Word has length 20 [2021-08-12 19:17:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:14,060 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2459 transitions. [2021-08-12 19:17:14,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:17:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2459 transitions. [2021-08-12 19:17:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:14,061 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:14,061 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:14,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10048,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:14,262 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1773524372, now seen corresponding path program 66 times [2021-08-12 19:17:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629505818] [2021-08-12 19:17:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:14,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:14,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629505818] [2021-08-12 19:17:14,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629505818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:14,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057861638] [2021-08-12 19:17:14,457 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 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 [2021-08-12 19:17:14,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:17:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:14,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:14,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,737 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 10 treesize of output 1 [2021-08-12 19:17:14,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:14,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,748 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 8 treesize of output 1 [2021-08-12 19:17:14,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,752 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 7 treesize of output 1 [2021-08-12 19:17:14,753 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,757 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 10 treesize of output 1 [2021-08-12 19:17:14,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:14,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,767 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 9 treesize of output 2 [2021-08-12 19:17:14,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,772 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 9 treesize of output 2 [2021-08-12 19:17:14,773 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,777 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 8 treesize of output 1 [2021-08-12 19:17:14,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,781 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 3 treesize of output 1 [2021-08-12 19:17:14,782 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,785 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 5 treesize of output 1 [2021-08-12 19:17:14,786 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:14,791 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:14,794 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:14,798 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,802 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 9 treesize of output 1 [2021-08-12 19:17:14,803 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:14,806 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,810 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 10 treesize of output 1 [2021-08-12 19:17:14,810 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,814 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 8 treesize of output 1 [2021-08-12 19:17:14,815 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:14,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:14,818 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 10 treesize of output 1 [2021-08-12 19:17:14,819 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:15,034 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-08-12 19:17:15,034 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-08-12 19:17:15,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-08-12 19:17:15,038 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:714, output treesize:277 [2021-08-12 19:17:15,241 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-08-12 19:17:15,385 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-08-12 19:17:15,953 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 4 treesize of output 2 [2021-08-12 19:17:15,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:15,960 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 9 treesize of output 2 [2021-08-12 19:17:15,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:15,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:15,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,270 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-08-12 19:17:16,270 INFO L628 ElimStorePlain]: treesize reduction 276, result has 49.9 percent of original size [2021-08-12 19:17:16,275 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 4 treesize of output 2 [2021-08-12 19:17:16,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,388 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 19:17:16,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:16,392 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 3 treesize of output 1 [2021-08-12 19:17:16,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,513 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-08-12 19:17:16,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:16,517 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 5 treesize of output 1 [2021-08-12 19:17:16,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,725 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-08-12 19:17:16,725 INFO L628 ElimStorePlain]: treesize reduction 36, result has 86.3 percent of original size [2021-08-12 19:17:16,729 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 4 treesize of output 2 [2021-08-12 19:17:16,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:16,827 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 5 treesize of output 1 [2021-08-12 19:17:16,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:16,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:16,926 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 6 treesize of output 2 [2021-08-12 19:17:16,927 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:17,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:17,020 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 3 treesize of output 1 [2021-08-12 19:17:17,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:17,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:17,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 19:17:17,109 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:595, output treesize:177 [2021-08-12 19:17:17,254 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-08-12 19:17:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:17,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057861638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:17,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:17,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:17:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555192333] [2021-08-12 19:17:17,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:17:17,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:17:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:17,500 INFO L87 Difference]: Start difference. First operand 714 states and 2459 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:18,640 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-08-12 19:17:19,093 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2021-08-12 19:17:19,783 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-08-12 19:17:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:22,669 INFO L93 Difference]: Finished difference Result 1131 states and 3677 transitions. [2021-08-12 19:17:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:17:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:17:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:22,673 INFO L225 Difference]: With dead ends: 1131 [2021-08-12 19:17:22,673 INFO L226 Difference]: Without dead ends: 1114 [2021-08-12 19:17:22,673 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2241.4ms TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:17:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-12 19:17:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 729. [2021-08-12 19:17:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.451923076923077) internal successors, (2513), 728 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2513 transitions. [2021-08-12 19:17:23,143 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2513 transitions. Word has length 20 [2021-08-12 19:17:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:23,143 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2513 transitions. [2021-08-12 19:17:23,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2513 transitions. [2021-08-12 19:17:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:23,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:23,144 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:23,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10072 [2021-08-12 19:17:23,346 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 261504928, now seen corresponding path program 67 times [2021-08-12 19:17:23,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:23,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423392421] [2021-08-12 19:17:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:23,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:23,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423392421] [2021-08-12 19:17:23,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423392421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:23,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715693144] [2021-08-12 19:17:23,528 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 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 [2021-08-12 19:17:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:17:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:23,751 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 5 treesize of output 1 [2021-08-12 19:17:23,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,755 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 6 treesize of output 2 [2021-08-12 19:17:23,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,760 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 5 treesize of output 1 [2021-08-12 19:17:23,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:23,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,768 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 6 treesize of output 2 [2021-08-12 19:17:23,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,772 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 3 treesize of output 1 [2021-08-12 19:17:23,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,776 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 5 treesize of output 1 [2021-08-12 19:17:23,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,781 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 4 treesize of output 2 [2021-08-12 19:17:23,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,787 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 6 treesize of output 2 [2021-08-12 19:17:23,788 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:23,792 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 6 treesize of output 2 [2021-08-12 19:17:23,793 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:24,002 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-08-12 19:17:24,002 INFO L628 ElimStorePlain]: treesize reduction 31, result has 89.2 percent of original size [2021-08-12 19:17:24,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 8 xjuncts. [2021-08-12 19:17:24,006 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:376, output treesize:255 [2021-08-12 19:17:24,228 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-08-12 19:17:24,393 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-08-12 19:17:24,577 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 19:17:25,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:25,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:25,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:25,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:25,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,525 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 61 [2021-08-12 19:17:25,525 INFO L628 ElimStorePlain]: treesize reduction 482, result has 27.7 percent of original size [2021-08-12 19:17:25,528 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 5 treesize of output 1 [2021-08-12 19:17:25,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,598 INFO L518 ElimStorePlain]: Eliminatee v_prenex_559 vanished before elimination [2021-08-12 19:17:25,601 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 6 treesize of output 2 [2021-08-12 19:17:25,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,668 INFO L518 ElimStorePlain]: Eliminatee v_prenex_558 vanished before elimination [2021-08-12 19:17:25,668 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-08-12 19:17:25,668 INFO L518 ElimStorePlain]: Eliminatee v_prenex_561 vanished before elimination [2021-08-12 19:17:25,671 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 5 treesize of output 1 [2021-08-12 19:17:25,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,740 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 3 treesize of output 1 [2021-08-12 19:17:25,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,807 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 5 treesize of output 1 [2021-08-12 19:17:25,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,874 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 3 treesize of output 1 [2021-08-12 19:17:25,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:25,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:25,939 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 6 treesize of output 2 [2021-08-12 19:17:25,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:26,043 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-08-12 19:17:26,044 INFO L628 ElimStorePlain]: treesize reduction 25, result has 83.6 percent of original size [2021-08-12 19:17:26,046 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 4 treesize of output 2 [2021-08-12 19:17:26,047 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:26,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:26,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-08-12 19:17:26,101 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 4 treesize of output 2 [2021-08-12 19:17:26,101 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:26,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:26,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_560 vanished before elimination [2021-08-12 19:17:26,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_571 vanished before elimination [2021-08-12 19:17:26,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-08-12 19:17:26,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:17:26,152 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:748, output treesize:119 [2021-08-12 19:17:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:26,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715693144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:26,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:26,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:17:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645043132] [2021-08-12 19:17:26,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:17:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:17:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:26,298 INFO L87 Difference]: Start difference. First operand 729 states and 2513 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:27,611 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-08-12 19:17:28,274 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2021-08-12 19:17:29,232 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 99 [2021-08-12 19:17:29,373 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-08-12 19:17:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:30,880 INFO L93 Difference]: Finished difference Result 1028 states and 3388 transitions. [2021-08-12 19:17:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:17:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:17:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:30,883 INFO L225 Difference]: With dead ends: 1028 [2021-08-12 19:17:30,883 INFO L226 Difference]: Without dead ends: 1011 [2021-08-12 19:17:30,883 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2450.0ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:17:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-08-12 19:17:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 726. [2021-08-12 19:17:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.449655172413793) internal successors, (2501), 725 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2501 transitions. [2021-08-12 19:17:31,346 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2501 transitions. Word has length 20 [2021-08-12 19:17:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2501 transitions. [2021-08-12 19:17:31,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2501 transitions. [2021-08-12 19:17:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:31,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:31,347 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:31,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-08-12 19:17:31,547 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash 679831486, now seen corresponding path program 68 times [2021-08-12 19:17:31,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:31,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998862623] [2021-08-12 19:17:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:31,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:31,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998862623] [2021-08-12 19:17:31,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998862623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:31,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248135455] [2021-08-12 19:17:31,723 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 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 [2021-08-12 19:17:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:17:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:31,972 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 6 treesize of output 2 [2021-08-12 19:17:31,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:31,977 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 4 treesize of output 2 [2021-08-12 19:17:31,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:31,982 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 6 treesize of output 2 [2021-08-12 19:17:31,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:31,986 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 6 treesize of output 2 [2021-08-12 19:17:31,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:31,991 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 5 treesize of output 1 [2021-08-12 19:17:31,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:31,995 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 3 treesize of output 1 [2021-08-12 19:17:31,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,000 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 6 treesize of output 2 [2021-08-12 19:17:32,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,004 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 5 treesize of output 1 [2021-08-12 19:17:32,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,009 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 6 treesize of output 2 [2021-08-12 19:17:32,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:32,014 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,018 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 6 treesize of output 2 [2021-08-12 19:17:32,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,022 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 5 treesize of output 1 [2021-08-12 19:17:32,023 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:32,027 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:32,256 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-08-12 19:17:32,256 INFO L628 ElimStorePlain]: treesize reduction 73, result has 79.4 percent of original size [2021-08-12 19:17:32,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-08-12 19:17:32,261 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 2 variables, input treesize:483, output treesize:281 [2021-08-12 19:17:32,478 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2021-08-12 19:17:33,376 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2, ends_with_10, v_prenex_584, v_prenex_594, v_prenex_583, v_prenex_586, v_prenex_575, v_prenex_585, v_prenex_574, v_prenex_588, v_prenex_577, v_prenex_587, v_prenex_576, v_prenex_589, v_prenex_580, v_prenex_590, v_prenex_582, v_prenex_581], 10=[v_prenex_579, v_prenex_578, v_prenex_591, v_prenex_592]} [2021-08-12 19:17:33,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:33,384 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 10 treesize of output 1 [2021-08-12 19:17:33,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,561 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 64 [2021-08-12 19:17:33,562 INFO L628 ElimStorePlain]: treesize reduction 666, result has 20.0 percent of original size [2021-08-12 19:17:33,562 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-08-12 19:17:33,565 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 3 treesize of output 1 [2021-08-12 19:17:33,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_594 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_575 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_585 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_574 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_588 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_577 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_587 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_576 vanished before elimination [2021-08-12 19:17:33,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-08-12 19:17:33,627 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 6 treesize of output 2 [2021-08-12 19:17:33,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,682 INFO L518 ElimStorePlain]: Eliminatee v_prenex_590 vanished before elimination [2021-08-12 19:17:33,682 INFO L518 ElimStorePlain]: Eliminatee v_prenex_582 vanished before elimination [2021-08-12 19:17:33,685 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 6 treesize of output 2 [2021-08-12 19:17:33,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,741 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 6 treesize of output 2 [2021-08-12 19:17:33,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,744 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 6 treesize of output 2 [2021-08-12 19:17:33,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,797 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 5 treesize of output 1 [2021-08-12 19:17:33,798 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,800 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 5 treesize of output 1 [2021-08-12 19:17:33,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,851 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 6 treesize of output 2 [2021-08-12 19:17:33,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,899 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 5 treesize of output 1 [2021-08-12 19:17:33,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:33,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:33,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 22 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:17:33,944 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:868, output treesize:118 [2021-08-12 19:17:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:34,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248135455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:34,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:34,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:17:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570391982] [2021-08-12 19:17:34,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:17:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:17:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:34,091 INFO L87 Difference]: Start difference. First operand 726 states and 2501 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:34,539 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-08-12 19:17:34,944 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-08-12 19:17:35,608 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2021-08-12 19:17:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:37,350 INFO L93 Difference]: Finished difference Result 930 states and 3107 transitions. [2021-08-12 19:17:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:17:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:17:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:37,353 INFO L225 Difference]: With dead ends: 930 [2021-08-12 19:17:37,353 INFO L226 Difference]: Without dead ends: 913 [2021-08-12 19:17:37,353 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1573.2ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:17:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-08-12 19:17:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 723. [2021-08-12 19:17:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.4473684210526314) internal successors, (2489), 722 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2489 transitions. [2021-08-12 19:17:37,817 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2489 transitions. Word has length 20 [2021-08-12 19:17:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:37,817 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2489 transitions. [2021-08-12 19:17:37,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2489 transitions. [2021-08-12 19:17:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:37,818 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:37,818 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:38,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10433 [2021-08-12 19:17:38,018 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash 49349310, now seen corresponding path program 69 times [2021-08-12 19:17:38,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:38,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872416501] [2021-08-12 19:17:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:38,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872416501] [2021-08-12 19:17:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872416501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618911249] [2021-08-12 19:17:38,263 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 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 [2021-08-12 19:17:38,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:17:38,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:38,495 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 5 treesize of output 1 [2021-08-12 19:17:38,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,500 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 3 treesize of output 1 [2021-08-12 19:17:38,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,505 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 4 treesize of output 2 [2021-08-12 19:17:38,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,510 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 6 treesize of output 2 [2021-08-12 19:17:38,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,515 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 6 treesize of output 2 [2021-08-12 19:17:38,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,520 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 6 treesize of output 2 [2021-08-12 19:17:38,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,525 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 5 treesize of output 1 [2021-08-12 19:17:38,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,529 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 6 treesize of output 2 [2021-08-12 19:17:38,530 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,534 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 5 treesize of output 1 [2021-08-12 19:17:38,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,539 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 6 treesize of output 2 [2021-08-12 19:17:38,540 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:38,834 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-08-12 19:17:38,835 INFO L628 ElimStorePlain]: treesize reduction 34, result has 90.6 percent of original size [2021-08-12 19:17:38,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-08-12 19:17:38,839 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:412, output treesize:326 [2021-08-12 19:17:39,125 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-08-12 19:17:39,342 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 19:17:39,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:39,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:39,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:39,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,245 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2021-08-12 19:17:40,245 INFO L628 ElimStorePlain]: treesize reduction 577, result has 25.0 percent of original size [2021-08-12 19:17:40,249 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 5 treesize of output 1 [2021-08-12 19:17:40,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,322 INFO L518 ElimStorePlain]: Eliminatee v_prenex_613 vanished before elimination [2021-08-12 19:17:40,326 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 5 treesize of output 1 [2021-08-12 19:17:40,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,399 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 6 treesize of output 2 [2021-08-12 19:17:40,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,466 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-08-12 19:17:40,470 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 4 treesize of output 2 [2021-08-12 19:17:40,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,538 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 4 treesize of output 2 [2021-08-12 19:17:40,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,605 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 3 treesize of output 1 [2021-08-12 19:17:40,606 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,714 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-08-12 19:17:40,715 INFO L628 ElimStorePlain]: treesize reduction 23, result has 86.1 percent of original size [2021-08-12 19:17:40,715 INFO L518 ElimStorePlain]: Eliminatee v_prenex_601 vanished before elimination [2021-08-12 19:17:40,715 INFO L518 ElimStorePlain]: Eliminatee v_prenex_600 vanished before elimination [2021-08-12 19:17:40,718 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 3 treesize of output 1 [2021-08-12 19:17:40,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,808 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.9 percent of original size [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_603 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_602 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_605 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_604 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_607 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_597 vanished before elimination [2021-08-12 19:17:40,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-08-12 19:17:40,811 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 4 treesize of output 2 [2021-08-12 19:17:40,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-08-12 19:17:40,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_598 vanished before elimination [2021-08-12 19:17:40,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-08-12 19:17:40,855 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 6 treesize of output 2 [2021-08-12 19:17:40,856 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:40,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:40,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 27 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:17:40,897 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 27 variables, input treesize:838, output treesize:108 [2021-08-12 19:17:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:41,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618911249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:41,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:41,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:17:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245399329] [2021-08-12 19:17:41,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:17:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:17:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:41,041 INFO L87 Difference]: Start difference. First operand 723 states and 2489 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:41,875 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-08-12 19:17:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:43,329 INFO L93 Difference]: Finished difference Result 785 states and 2650 transitions. [2021-08-12 19:17:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:17:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:17:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:43,331 INFO L225 Difference]: With dead ends: 785 [2021-08-12 19:17:43,331 INFO L226 Difference]: Without dead ends: 768 [2021-08-12 19:17:43,332 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:17:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-12 19:17:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 721. [2021-08-12 19:17:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.4472222222222224) internal successors, (2482), 720 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2482 transitions. [2021-08-12 19:17:43,826 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2482 transitions. Word has length 20 [2021-08-12 19:17:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:43,827 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2482 transitions. [2021-08-12 19:17:43,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2482 transitions. [2021-08-12 19:17:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:43,828 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:43,828 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10554,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:44,028 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash -707677058, now seen corresponding path program 70 times [2021-08-12 19:17:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472489117] [2021-08-12 19:17:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:44,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:44,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472489117] [2021-08-12 19:17:44,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472489117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:44,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039086393] [2021-08-12 19:17:44,209 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 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 [2021-08-12 19:17:44,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:17:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:44,443 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 5 treesize of output 1 [2021-08-12 19:17:44,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,449 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 6 treesize of output 2 [2021-08-12 19:17:44,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,454 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 6 treesize of output 2 [2021-08-12 19:17:44,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,459 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 6 treesize of output 2 [2021-08-12 19:17:44,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,464 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 5 treesize of output 1 [2021-08-12 19:17:44,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,470 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 5 treesize of output 1 [2021-08-12 19:17:44,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,476 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 4 treesize of output 2 [2021-08-12 19:17:44,476 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,480 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 6 treesize of output 2 [2021-08-12 19:17:44,481 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,485 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 3 treesize of output 1 [2021-08-12 19:17:44,486 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,490 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 6 treesize of output 2 [2021-08-12 19:17:44,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:44,495 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:44,791 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-08-12 19:17:44,792 INFO L628 ElimStorePlain]: treesize reduction 42, result has 88.6 percent of original size [2021-08-12 19:17:44,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-08-12 19:17:44,796 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:458, output treesize:326 [2021-08-12 19:17:45,085 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-08-12 19:17:45,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:45,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-08-12 19:17:45,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:45,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:45,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:45,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:45,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:45,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:45,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:17:45,903 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 10 treesize of output 1 [2021-08-12 19:17:45,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:45,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:17:45,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,208 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 80 [2021-08-12 19:17:46,208 INFO L628 ElimStorePlain]: treesize reduction 713, result has 23.1 percent of original size [2021-08-12 19:17:46,213 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 3 treesize of output 1 [2021-08-12 19:17:46,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,218 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 5 treesize of output 1 [2021-08-12 19:17:46,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,312 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 3 treesize of output 1 [2021-08-12 19:17:46,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,411 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 3 treesize of output 1 [2021-08-12 19:17:46,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,489 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 3 treesize of output 1 [2021-08-12 19:17:46,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,566 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 6 treesize of output 2 [2021-08-12 19:17:46,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,641 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 4 treesize of output 2 [2021-08-12 19:17:46,641 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,766 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-08-12 19:17:46,767 INFO L628 ElimStorePlain]: treesize reduction 25, result has 86.6 percent of original size [2021-08-12 19:17:46,770 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 4 treesize of output 2 [2021-08-12 19:17:46,771 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,830 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 5 treesize of output 1 [2021-08-12 19:17:46,831 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,889 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 5 treesize of output 1 [2021-08-12 19:17:46,890 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:46,946 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 4 treesize of output 2 [2021-08-12 19:17:46,947 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:17:46,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:17:47,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 11 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 19:17:47,001 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:1104, output treesize:136 [2021-08-12 19:17:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039086393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:47,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:47,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 19:17:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974607576] [2021-08-12 19:17:47,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:17:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:17:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:17:47,219 INFO L87 Difference]: Start difference. First operand 721 states and 2482 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:48,180 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-08-12 19:17:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:49,691 INFO L93 Difference]: Finished difference Result 795 states and 2675 transitions. [2021-08-12 19:17:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:17:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-08-12 19:17:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:49,694 INFO L225 Difference]: With dead ends: 795 [2021-08-12 19:17:49,694 INFO L226 Difference]: Without dead ends: 778 [2021-08-12 19:17:49,695 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1284.4ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:17:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-12 19:17:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 720. [2021-08-12 19:17:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.4450625869262863) internal successors, (2477), 719 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2477 transitions. [2021-08-12 19:17:50,179 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2477 transitions. Word has length 20 [2021-08-12 19:17:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:50,179 INFO L482 AbstractCegarLoop]: Abstraction has 720 states and 2477 transitions. [2021-08-12 19:17:50,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-08-12 19:17:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2477 transitions. [2021-08-12 19:17:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:50,180 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:50,180 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:50,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10722 [2021-08-12 19:17:50,382 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash -128574150, now seen corresponding path program 71 times [2021-08-12 19:17:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:50,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7457763] [2021-08-12 19:17:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:50,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7457763] [2021-08-12 19:17:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7457763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074988327] [2021-08-12 19:17:50,627 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 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 [2021-08-12 19:17:50,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:17:50,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:17:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:51,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074988327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:51,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:51,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:17:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626985359] [2021-08-12 19:17:51,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:17:51,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:17:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:17:51,207 INFO L87 Difference]: Start difference. First operand 720 states and 2477 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:17:52,295 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-08-12 19:17:53,305 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-08-12 19:17:53,582 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-08-12 19:17:54,623 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-08-12 19:17:55,835 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-08-12 19:17:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:17:57,346 INFO L93 Difference]: Finished difference Result 1215 states and 3875 transitions. [2021-08-12 19:17:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:17:57,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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 20 [2021-08-12 19:17:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:17:57,350 INFO L225 Difference]: With dead ends: 1215 [2021-08-12 19:17:57,350 INFO L226 Difference]: Without dead ends: 1138 [2021-08-12 19:17:57,350 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2326.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:17:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-08-12 19:17:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 723. [2021-08-12 19:17:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.4542936288088644) internal successors, (2494), 722 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:17:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2494 transitions. [2021-08-12 19:17:57,850 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2494 transitions. Word has length 20 [2021-08-12 19:17:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:17:57,850 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2494 transitions. [2021-08-12 19:17:57,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 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) [2021-08-12 19:17:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2494 transitions. [2021-08-12 19:17:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:17:57,852 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:17:57,852 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:17:58,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11007,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:17:58,052 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:17:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:17:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 72 times [2021-08-12 19:17:58,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:17:58,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130087808] [2021-08-12 19:17:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:17:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:17:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:58,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:17:58,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130087808] [2021-08-12 19:17:58,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130087808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:58,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224263814] [2021-08-12 19:17:58,235 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 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 [2021-08-12 19:17:58,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:17:58,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:17:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:17:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:17:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:17:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224263814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:17:58,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:17:58,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:17:58,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159274254] [2021-08-12 19:17:58,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:17:58,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:17:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:17:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:17:58,723 INFO L87 Difference]: Start difference. First operand 723 states and 2494 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:17:59,689 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-08-12 19:17:59,806 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-08-12 19:18:00,049 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-08-12 19:18:00,172 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-08-12 19:18:00,401 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-08-12 19:18:00,557 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-08-12 19:18:00,972 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-08-12 19:18:01,104 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-08-12 19:18:01,343 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-08-12 19:18:01,539 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-08-12 19:18:02,180 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-08-12 19:18:02,369 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-08-12 19:18:02,697 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-08-12 19:18:02,909 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-08-12 19:18:03,949 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-08-12 19:18:04,145 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-08-12 19:18:04,487 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-08-12 19:18:05,618 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-08-12 19:18:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:07,101 INFO L93 Difference]: Finished difference Result 1213 states and 3954 transitions. [2021-08-12 19:18:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:18:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:07,105 INFO L225 Difference]: With dead ends: 1213 [2021-08-12 19:18:07,105 INFO L226 Difference]: Without dead ends: 1196 [2021-08-12 19:18:07,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 4404.1ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:18:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-12 19:18:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 741. [2021-08-12 19:18:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.443243243243243) internal successors, (2548), 740 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2548 transitions. [2021-08-12 19:18:07,619 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2548 transitions. Word has length 20 [2021-08-12 19:18:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:07,619 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2548 transitions. [2021-08-12 19:18:07,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2548 transitions. [2021-08-12 19:18:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:07,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:07,620 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:07,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11026 [2021-08-12 19:18:07,821 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 73 times [2021-08-12 19:18:07,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:07,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087887960] [2021-08-12 19:18:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:07,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:07,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087887960] [2021-08-12 19:18:07,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087887960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:07,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651512877] [2021-08-12 19:18:07,987 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 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 [2021-08-12 19:18:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:08,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:18:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:08,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651512877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:08,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:08,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:08,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957775672] [2021-08-12 19:18:08,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:08,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:08,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:08,542 INFO L87 Difference]: Start difference. First operand 741 states and 2548 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:09,673 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-08-12 19:18:10,168 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-08-12 19:18:10,886 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-08-12 19:18:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:12,651 INFO L93 Difference]: Finished difference Result 1088 states and 3524 transitions. [2021-08-12 19:18:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:18:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:12,655 INFO L225 Difference]: With dead ends: 1088 [2021-08-12 19:18:12,655 INFO L226 Difference]: Without dead ends: 1056 [2021-08-12 19:18:12,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1411.8ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:18:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-08-12 19:18:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 745. [2021-08-12 19:18:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.4381720430107525) internal successors, (2558), 744 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2558 transitions. [2021-08-12 19:18:13,199 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2558 transitions. Word has length 20 [2021-08-12 19:18:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:13,199 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2558 transitions. [2021-08-12 19:18:13,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2558 transitions. [2021-08-12 19:18:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:13,200 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:13,200 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:13,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11047 [2021-08-12 19:18:13,402 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash -555887772, now seen corresponding path program 74 times [2021-08-12 19:18:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:13,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865174877] [2021-08-12 19:18:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:13,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865174877] [2021-08-12 19:18:13,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865174877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16065760] [2021-08-12 19:18:13,574 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 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 [2021-08-12 19:18:13,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:18:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:14,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16065760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:14,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:14,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:14,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739087116] [2021-08-12 19:18:14,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:14,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:14,027 INFO L87 Difference]: Start difference. First operand 745 states and 2558 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:14,461 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-08-12 19:18:14,723 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-08-12 19:18:15,037 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-08-12 19:18:15,347 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-08-12 19:18:15,558 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-08-12 19:18:16,078 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-08-12 19:18:17,791 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-08-12 19:18:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:19,709 INFO L93 Difference]: Finished difference Result 1120 states and 3673 transitions. [2021-08-12 19:18:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:18:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:19,712 INFO L225 Difference]: With dead ends: 1120 [2021-08-12 19:18:19,712 INFO L226 Difference]: Without dead ends: 1103 [2021-08-12 19:18:19,713 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2419.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:18:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-08-12 19:18:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 746. [2021-08-12 19:18:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.438926174496644) internal successors, (2562), 745 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2562 transitions. [2021-08-12 19:18:20,206 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2562 transitions. Word has length 20 [2021-08-12 19:18:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:20,206 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 2562 transitions. [2021-08-12 19:18:20,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2562 transitions. [2021-08-12 19:18:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:20,207 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:20,207 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:20,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11066,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:20,409 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1896142186, now seen corresponding path program 75 times [2021-08-12 19:18:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:20,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31351890] [2021-08-12 19:18:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:20,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:20,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31351890] [2021-08-12 19:18:20,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31351890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:20,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707109695] [2021-08-12 19:18:20,618 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 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 [2021-08-12 19:18:20,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:18:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:20,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:18:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:21,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707109695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:21,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:21,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:21,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227148065] [2021-08-12 19:18:21,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:21,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:21,100 INFO L87 Difference]: Start difference. First operand 746 states and 2562 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:22,572 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-08-12 19:18:23,267 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 19:18:23,438 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-08-12 19:18:23,644 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-08-12 19:18:24,611 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-08-12 19:18:24,753 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-08-12 19:18:25,054 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-08-12 19:18:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:27,323 INFO L93 Difference]: Finished difference Result 1247 states and 4033 transitions. [2021-08-12 19:18:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:18:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:27,327 INFO L225 Difference]: With dead ends: 1247 [2021-08-12 19:18:27,327 INFO L226 Difference]: Without dead ends: 1200 [2021-08-12 19:18:27,327 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2622.3ms TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:18:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-12 19:18:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 754. [2021-08-12 19:18:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4395750332005313) internal successors, (2590), 753 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2590 transitions. [2021-08-12 19:18:27,843 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2590 transitions. Word has length 20 [2021-08-12 19:18:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:27,843 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2590 transitions. [2021-08-12 19:18:27,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2590 transitions. [2021-08-12 19:18:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:27,844 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:27,844 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:28,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11089,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:28,045 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1801488452, now seen corresponding path program 76 times [2021-08-12 19:18:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434962525] [2021-08-12 19:18:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:28,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:28,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434962525] [2021-08-12 19:18:28,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434962525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:28,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409217120] [2021-08-12 19:18:28,229 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 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 [2021-08-12 19:18:28,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:18:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:18:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:28,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409217120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:28,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:28,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:28,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437432561] [2021-08-12 19:18:28,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:28,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:28,764 INFO L87 Difference]: Start difference. First operand 754 states and 2590 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:30,075 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-08-12 19:18:30,730 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-08-12 19:18:31,916 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-08-12 19:18:32,039 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-08-12 19:18:32,179 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-08-12 19:18:32,475 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-08-12 19:18:33,484 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-08-12 19:18:33,649 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-08-12 19:18:33,861 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-08-12 19:18:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:35,944 INFO L93 Difference]: Finished difference Result 1353 states and 4392 transitions. [2021-08-12 19:18:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:18:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:35,948 INFO L225 Difference]: With dead ends: 1353 [2021-08-12 19:18:35,948 INFO L226 Difference]: Without dead ends: 1276 [2021-08-12 19:18:35,949 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3145.1ms TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:18:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-08-12 19:18:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 760. [2021-08-12 19:18:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.437417654808959) internal successors, (2609), 759 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2609 transitions. [2021-08-12 19:18:36,489 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2609 transitions. Word has length 20 [2021-08-12 19:18:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:36,489 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2609 transitions. [2021-08-12 19:18:36,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2609 transitions. [2021-08-12 19:18:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:36,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:36,490 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:36,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11110,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:36,691 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:36,691 INFO L82 PathProgramCache]: Analyzing trace with hash -625997808, now seen corresponding path program 77 times [2021-08-12 19:18:36,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:36,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155962093] [2021-08-12 19:18:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:36,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155962093] [2021-08-12 19:18:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155962093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481172472] [2021-08-12 19:18:36,845 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 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 [2021-08-12 19:18:36,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:18:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:18:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:37,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481172472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:37,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:37,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:18:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123126919] [2021-08-12 19:18:37,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:18:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:18:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:18:37,402 INFO L87 Difference]: Start difference. First operand 760 states and 2609 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2021-08-12 19:18:37,870 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-08-12 19:18:38,472 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-08-12 19:18:38,836 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-08-12 19:18:39,203 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-08-12 19:18:39,712 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-08-12 19:18:40,781 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-08-12 19:18:41,071 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-08-12 19:18:42,108 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-08-12 19:18:42,336 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-08-12 19:18:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:43,922 INFO L93 Difference]: Finished difference Result 1230 states and 4055 transitions. [2021-08-12 19:18:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:18:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20 [2021-08-12 19:18:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:43,926 INFO L225 Difference]: With dead ends: 1230 [2021-08-12 19:18:43,926 INFO L226 Difference]: Without dead ends: 1168 [2021-08-12 19:18:43,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2889.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:18:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-08-12 19:18:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 760. [2021-08-12 19:18:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.437417654808959) internal successors, (2609), 759 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2609 transitions. [2021-08-12 19:18:44,445 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2609 transitions. Word has length 20 [2021-08-12 19:18:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:44,445 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2609 transitions. [2021-08-12 19:18:44,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2021-08-12 19:18:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2609 transitions. [2021-08-12 19:18:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:44,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:44,446 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:44,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11128,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:18:44,647 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1601784788, now seen corresponding path program 78 times [2021-08-12 19:18:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:44,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966715902] [2021-08-12 19:18:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:44,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:44,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966715902] [2021-08-12 19:18:44,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966715902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507863604] [2021-08-12 19:18:44,868 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 [2021-08-12 19:18:44,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:18:44,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:18:44,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:18:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507863604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:45,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:45,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:45,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425270519] [2021-08-12 19:18:45,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:45,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:45,437 INFO L87 Difference]: Start difference. First operand 760 states and 2609 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:46,350 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-08-12 19:18:47,486 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-08-12 19:18:47,704 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-08-12 19:18:48,672 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-08-12 19:18:48,919 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-08-12 19:18:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:18:51,441 INFO L93 Difference]: Finished difference Result 1213 states and 3936 transitions. [2021-08-12 19:18:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:18:51,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:18:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:18:51,445 INFO L225 Difference]: With dead ends: 1213 [2021-08-12 19:18:51,445 INFO L226 Difference]: Without dead ends: 1166 [2021-08-12 19:18:51,445 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:18:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-08-12 19:18:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 755. [2021-08-12 19:18:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4416445623342176) internal successors, (2595), 754 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:18:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2595 transitions. [2021-08-12 19:18:52,017 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2595 transitions. Word has length 20 [2021-08-12 19:18:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:18:52,017 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2595 transitions. [2021-08-12 19:18:52,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2595 transitions. [2021-08-12 19:18:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:18:52,018 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:18:52,018 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:18:52,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11145 [2021-08-12 19:18:52,219 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:18:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:18:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1270707550, now seen corresponding path program 79 times [2021-08-12 19:18:52,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:18:52,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710299319] [2021-08-12 19:18:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:18:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:18:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710299319] [2021-08-12 19:18:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710299319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351642488] [2021-08-12 19:18:52,401 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 [2021-08-12 19:18:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:18:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:18:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:18:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:18:52,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351642488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:18:52,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:18:52,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:18:52,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719526901] [2021-08-12 19:18:52,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:18:52,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:18:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:18:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:18:52,973 INFO L87 Difference]: Start difference. First operand 755 states and 2595 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:18:54,473 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-08-12 19:18:54,967 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-08-12 19:18:56,640 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 19:18:56,782 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-08-12 19:18:57,055 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-08-12 19:18:58,336 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-08-12 19:19:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:19:01,180 INFO L93 Difference]: Finished difference Result 1509 states and 4673 transitions. [2021-08-12 19:19:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:19:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-08-12 19:19:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:19:01,184 INFO L225 Difference]: With dead ends: 1509 [2021-08-12 19:19:01,184 INFO L226 Difference]: Without dead ends: 1417 [2021-08-12 19:19:01,185 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2620.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:19:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-08-12 19:19:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 782. [2021-08-12 19:19:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.4532650448143407) internal successors, (2697), 781 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:19:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2697 transitions. [2021-08-12 19:19:01,774 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2697 transitions. Word has length 20 [2021-08-12 19:19:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:19:01,774 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2697 transitions. [2021-08-12 19:19:01,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:19:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2697 transitions. [2021-08-12 19:19:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:19:01,775 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:19:01,775 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:19:01,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11169 [2021-08-12 19:19:01,976 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:19:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:19:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -519643180, now seen corresponding path program 80 times [2021-08-12 19:19:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:19:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361817029] [2021-08-12 19:19:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:19:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:19:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:19:02,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361817029] [2021-08-12 19:19:02,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361817029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:02,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862240517] [2021-08-12 19:19:02,152 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 [2021-08-12 19:19:02,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:19:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:19:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:19:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:19:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:19:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862240517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:19:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:19:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 19:19:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10300025] [2021-08-12 19:19:02,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:19:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:19:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:19:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:19:02,673 INFO L87 Difference]: Start difference. First operand 782 states and 2697 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-08-12 19:19:03,359 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-08-12 19:19:03,764 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-08-12 19:19:05,336 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-08-12 19:19:06,621 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 Received shutdown request... [2021-08-12 19:19:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:19:08,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11187 [2021-08-12 19:19:08,130 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:19:08,132 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:19:08,134 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:19:08,134 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:19:08 BasicIcfg [2021-08-12 19:19:08,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:19:08,134 INFO L168 Benchmark]: Toolchain (without parser) took 517801.34 ms. Allocated memory was 198.2 MB in the beginning and 599.8 MB in the end (delta: 401.6 MB). Free memory was 178.1 MB in the beginning and 339.9 MB in the end (delta: -161.8 MB). Peak memory consumption was 427.8 MB. Max. memory is 8.0 GB. [2021-08-12 19:19:08,134 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 179.5 MB in the beginning and 179.4 MB in the end (delta: 93.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:19:08,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.41 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:19:08,134 INFO L168 Benchmark]: Boogie Preprocessor took 16.20 ms. Allocated memory is still 198.2 MB. Free memory was 176.4 MB in the beginning and 175.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:19:08,134 INFO L168 Benchmark]: RCFGBuilder took 506.24 ms. Allocated memory is still 198.2 MB. Free memory was 175.2 MB in the beginning and 173.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:19:08,134 INFO L168 Benchmark]: TraceAbstraction took 517235.62 ms. Allocated memory was 198.2 MB in the beginning and 599.8 MB in the end (delta: 401.6 MB). Free memory was 173.4 MB in the beginning and 339.9 MB in the end (delta: -166.5 MB). Peak memory consumption was 423.3 MB. Max. memory is 8.0 GB. [2021-08-12 19:19:08,135 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 198.2 MB. Free memory was 179.5 MB in the beginning and 179.4 MB in the end (delta: 93.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.41 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.20 ms. Allocated memory is still 198.2 MB. Free memory was 176.4 MB in the beginning and 175.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.24 ms. Allocated memory is still 198.2 MB. Free memory was 175.2 MB in the beginning and 173.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 517235.62 ms. Allocated memory was 198.2 MB in the beginning and 599.8 MB in the end (delta: 401.6 MB). Free memory was 173.4 MB in the beginning and 339.9 MB in the end (delta: -166.5 MB). Peak memory consumption was 423.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (782states) and FLOYD_HOARE automaton (currently 17 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (1124 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 517146.9ms, OverallIterations: 106, TraceHistogramMax: 1, EmptinessCheckTime: 109.2ms, AutomataDifference: 284212.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6249 SDtfs, 10613 SDslu, 38284 SDs, 0 SdLazy, 41452 SolverSat, 3668 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23522.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3690 GetRequests, 1150 SyntacticMatches, 75 SemanticMatches, 2465 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18051 ImplicationChecksByTransitivity, 177465.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=782occurred in iteration=105, InterpolantAutomatonStates: 1737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23036.6ms AutomataMinimizationTime, 105 MinimizatonAttempts, 24840 StatesRemovedByMinimization, 101 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 487.3ms SsaConstructionTime, 1295.8ms SatisfiabilityAnalysisTime, 187443.3ms InterpolantComputationTime, 3675 NumberOfCodeBlocks, 3675 NumberOfCodeBlocksAsserted, 279 NumberOfCheckSat, 3485 ConstructedInterpolants, 87 QuantifiedInterpolants, 139119 SizeOfPredicates, 1224 NumberOfNonLiveVariables, 6944 ConjunctsInSsa, 3077 ConjunctsInUnsatCore, 190 InterpolantComputations, 22 PerfectInterpolantSequences, 18/506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown