/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:23:05,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:23:05,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:23:05,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:23:05,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:23:05,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:23:05,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:23:05,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:23:05,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:23:05,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:23:05,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:23:05,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:23:05,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:23:05,543 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:23:05,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:23:05,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:23:05,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:23:05,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:23:05,545 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:23:05,545 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:23:05,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:23:05,545 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:23:05,545 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:23:05,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:23:05,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:23:05,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:23:05,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:23:05,736 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:23:05,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-04-06 16:23:05,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9d6da1e/08883bf1cc554495a7cb64d9fd7ae880/FLAG0fe05836d [2022-04-06 16:23:06,106 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:23:06,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-04-06 16:23:06,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9d6da1e/08883bf1cc554495a7cb64d9fd7ae880/FLAG0fe05836d [2022-04-06 16:23:06,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9d6da1e/08883bf1cc554495a7cb64d9fd7ae880 [2022-04-06 16:23:06,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:23:06,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:23:06,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:23:06,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:23:06,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:23:06,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d44edc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06, skipping insertion in model container [2022-04-06 16:23:06,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:23:06,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:23:06,244 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2022-04-06 16:23:06,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:23:06,269 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:23:06,276 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2022-04-06 16:23:06,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:23:06,293 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:23:06,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06 WrapperNode [2022-04-06 16:23:06,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:23:06,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:23:06,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:23:06,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:23:06,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:23:06,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:23:06,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:23:06,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:23:06,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (1/1) ... [2022-04-06 16:23:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:23:06,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:06,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:23:06,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:23:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:23:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:23:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:23:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:23:06,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:23:06,412 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:23:06,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:23:06,534 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:23:06,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:23:06,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:23:06,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:23:06 BoogieIcfgContainer [2022-04-06 16:23:06,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:23:06,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:23:06,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:23:06,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:23:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:23:06" (1/3) ... [2022-04-06 16:23:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e690b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:23:06, skipping insertion in model container [2022-04-06 16:23:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:23:06" (2/3) ... [2022-04-06 16:23:06,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e690b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:23:06, skipping insertion in model container [2022-04-06 16:23:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:23:06" (3/3) ... [2022-04-06 16:23:06,561 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2022-04-06 16:23:06,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:23:06,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:23:06,601 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:23:06,606 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:23:06,607 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:23:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:23:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 16:23:06,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:06,631 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:06,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-04-06 16:23:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275057947] [2022-04-06 16:23:06,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-04-06 16:23:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:06,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664994863] [2022-04-06 16:23:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:06,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:23:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:06,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:23:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:23:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:23:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664994863] [2022-04-06 16:23:06,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664994863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:06,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:23:06,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275057947] [2022-04-06 16:23:06,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275057947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:06,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:06,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:23:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103997582] [2022-04-06 16:23:06,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:06,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:23:06,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:23:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:23:06,834 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:23:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:06,897 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-04-06 16:23:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:23:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 16:23:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:06,904 INFO L225 Difference]: With dead ends: 64 [2022-04-06 16:23:06,904 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 16:23:06,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:23:06,910 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:06,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 16:23:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 16:23:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:23:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 16:23:06,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-04-06 16:23:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:06,943 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 16:23:06,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:23:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 16:23:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 16:23:06,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:06,944 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:06,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:23:06,945 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-04-06 16:23:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:06,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793883269] [2022-04-06 16:23:06,946 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-04-06 16:23:06,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573831429] [2022-04-06 16:23:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:06,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:07,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:23:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:23:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:07,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:23:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:23:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:23:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:07,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573831429] [2022-04-06 16:23:07,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573831429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:07,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793883269] [2022-04-06 16:23:07,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793883269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931580581] [2022-04-06 16:23:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:07,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:07,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:23:07,085 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:23:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:07,170 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-04-06 16:23:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:23:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 16:23:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:07,172 INFO L225 Difference]: With dead ends: 42 [2022-04-06 16:23:07,172 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 16:23:07,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:23:07,173 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:07,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:23:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 16:23:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 16:23:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:23:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 16:23:07,181 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-04-06 16:23:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:07,182 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 16:23:07,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:23:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 16:23:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 16:23:07,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:07,183 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:07,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 16:23:07,183 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-04-06 16:23:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1793602831] [2022-04-06 16:23:07,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-04-06 16:23:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:07,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758636221] [2022-04-06 16:23:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:07,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377359476] [2022-04-06 16:23:07,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:07,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:07,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:07,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:07,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:23:07,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:23:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:23:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:23:07,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:23:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758636221] [2022-04-06 16:23:07,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377359476] [2022-04-06 16:23:07,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377359476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:07,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1793602831] [2022-04-06 16:23:07,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1793602831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990654329] [2022-04-06 16:23:07,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:07,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:23:07,377 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:23:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:07,425 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-04-06 16:23:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 16:23:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:07,428 INFO L225 Difference]: With dead ends: 49 [2022-04-06 16:23:07,428 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 16:23:07,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:23:07,433 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:07,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 16:23:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 16:23:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:23:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-04-06 16:23:07,481 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-04-06 16:23:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:07,481 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-04-06 16:23:07,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:23:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-04-06 16:23:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 16:23:07,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:07,482 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:07,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:07,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:07,700 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-04-06 16:23:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751504625] [2022-04-06 16:23:07,701 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-04-06 16:23:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:07,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846704146] [2022-04-06 16:23:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:07,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362154231] [2022-04-06 16:23:07,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:07,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:07,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:07,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:23:07,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:07,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:23:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:23:07,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:23:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846704146] [2022-04-06 16:23:07,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362154231] [2022-04-06 16:23:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362154231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751504625] [2022-04-06 16:23:07,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751504625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:07,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:07,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:07,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818085063] [2022-04-06 16:23:07,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:07,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:23:07,844 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:23:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:07,911 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-04-06 16:23:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 16:23:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:07,913 INFO L225 Difference]: With dead ends: 53 [2022-04-06 16:23:07,913 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 16:23:07,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:23:07,919 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:07,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:23:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 16:23:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 16:23:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:23:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 16:23:07,935 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-04-06 16:23:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:07,935 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 16:23:07,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:23:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 16:23:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:23:07,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:07,936 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:07,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:08,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 16:23:08,154 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-04-06 16:23:08,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018926092] [2022-04-06 16:23:08,155 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-04-06 16:23:08,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235915726] [2022-04-06 16:23:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:08,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:08,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302022015] [2022-04-06 16:23:08,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:08,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:08,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:08,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:08,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:23:08,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:23:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 16:23:08,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 16:23:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:08,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235915726] [2022-04-06 16:23:08,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302022015] [2022-04-06 16:23:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302022015] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:23:08,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:23:08,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 16:23:08,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018926092] [2022-04-06 16:23:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018926092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:08,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:08,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078556360] [2022-04-06 16:23:08,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:08,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:23:08,471 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:23:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:08,537 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-04-06 16:23:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:23:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:08,542 INFO L225 Difference]: With dead ends: 75 [2022-04-06 16:23:08,542 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 16:23:08,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:23:08,543 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:08,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 16:23:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 16:23:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:23:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-04-06 16:23:08,561 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-04-06 16:23:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:08,562 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-04-06 16:23:08,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:23:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-04-06 16:23:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:23:08,564 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:08,564 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:08,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:08,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:08,782 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:08,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-04-06 16:23:08,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:08,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914314394] [2022-04-06 16:23:08,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-04-06 16:23:08,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:08,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134302573] [2022-04-06 16:23:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:08,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:08,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:08,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376148205] [2022-04-06 16:23:08,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:08,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:08,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:08,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:08,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:23:08,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:08,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:23:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:23:08,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:23:08,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134302573] [2022-04-06 16:23:08,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376148205] [2022-04-06 16:23:08,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376148205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:08,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:08,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:08,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:08,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914314394] [2022-04-06 16:23:08,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914314394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:08,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:08,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:08,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142762879] [2022-04-06 16:23:08,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:08,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:23:08,928 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 16:23:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:08,958 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-04-06 16:23:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-04-06 16:23:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:08,959 INFO L225 Difference]: With dead ends: 87 [2022-04-06 16:23:08,959 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 16:23:08,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:23:08,960 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:08,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 16:23:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-04-06 16:23:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:23:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-04-06 16:23:08,968 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-04-06 16:23:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:08,968 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-04-06 16:23:08,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 16:23:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-04-06 16:23:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:23:08,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:08,969 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:08,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:09,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:09,186 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-04-06 16:23:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:09,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [634864129] [2022-04-06 16:23:09,187 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-04-06 16:23:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:09,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118619369] [2022-04-06 16:23:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:09,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:09,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135956832] [2022-04-06 16:23:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:09,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:09,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:09,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:23:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:23:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:23:09,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:23:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118619369] [2022-04-06 16:23:09,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135956832] [2022-04-06 16:23:09,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135956832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:09,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:09,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 16:23:09,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [634864129] [2022-04-06 16:23:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [634864129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:09,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:09,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:09,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511978415] [2022-04-06 16:23:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:09,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:23:09,400 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:23:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:09,434 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-04-06 16:23:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:23:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-06 16:23:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:09,435 INFO L225 Difference]: With dead ends: 121 [2022-04-06 16:23:09,435 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 16:23:09,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:23:09,436 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:09,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 16:23:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-04-06 16:23:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:23:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-04-06 16:23:09,468 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-04-06 16:23:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:09,468 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-04-06 16:23:09,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:23:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-04-06 16:23:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:23:09,469 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:09,469 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:09,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:09,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:09,685 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-04-06 16:23:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977832343] [2022-04-06 16:23:09,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-04-06 16:23:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371097007] [2022-04-06 16:23:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:09,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:09,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277730513] [2022-04-06 16:23:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:09,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:09,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:09,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:23:09,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:09,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:23:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:23:09,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:23:09,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371097007] [2022-04-06 16:23:09,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277730513] [2022-04-06 16:23:09,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277730513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:09,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:09,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:09,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:09,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977832343] [2022-04-06 16:23:09,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977832343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:09,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:09,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382244317] [2022-04-06 16:23:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:09,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:23:09,876 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:23:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:09,908 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-04-06 16:23:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-06 16:23:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:09,911 INFO L225 Difference]: With dead ends: 106 [2022-04-06 16:23:09,911 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 16:23:09,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:23:09,912 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:09,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 16:23:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 16:23:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:23:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-04-06 16:23:09,929 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-04-06 16:23:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:09,930 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-04-06 16:23:09,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:23:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-04-06 16:23:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 16:23:09,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:09,933 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:09,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 16:23:10,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:10,165 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-04-06 16:23:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:10,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [940992681] [2022-04-06 16:23:10,166 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-04-06 16:23:10,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:10,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473771123] [2022-04-06 16:23:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:10,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535582365] [2022-04-06 16:23:10,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:10,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:10,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:23:10,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:23:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:23:10,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:23:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473771123] [2022-04-06 16:23:10,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535582365] [2022-04-06 16:23:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535582365] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:10,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:23:10,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [940992681] [2022-04-06 16:23:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [940992681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:10,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:23:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412007570] [2022-04-06 16:23:10,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:10,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:23:10,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:23:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:23:10,474 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:23:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:10,581 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-04-06 16:23:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-04-06 16:23:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:10,585 INFO L225 Difference]: With dead ends: 118 [2022-04-06 16:23:10,585 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 16:23:10,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:23:10,588 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:10,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:23:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 16:23:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-04-06 16:23:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 16:23:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-04-06 16:23:10,605 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-04-06 16:23:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:10,606 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-04-06 16:23:10,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:23:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-04-06 16:23:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:23:10,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:10,608 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:10,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:10,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:10,828 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-04-06 16:23:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:10,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1686544874] [2022-04-06 16:23:10,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-04-06 16:23:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:10,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973114671] [2022-04-06 16:23:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:10,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:10,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786874639] [2022-04-06 16:23:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:10,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:10,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:23:10,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 16:23:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:23:11,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:23:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973114671] [2022-04-06 16:23:11,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786874639] [2022-04-06 16:23:11,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786874639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:11,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:11,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 16:23:11,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1686544874] [2022-04-06 16:23:11,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1686544874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:11,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:11,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:23:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946445083] [2022-04-06 16:23:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:11,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:23:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:23:11,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:11,321 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 16:23:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:11,504 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-04-06 16:23:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:23:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-04-06 16:23:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:11,505 INFO L225 Difference]: With dead ends: 131 [2022-04-06 16:23:11,505 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 16:23:11,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:23:11,506 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:11,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:23:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 16:23:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-04-06 16:23:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 16:23:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-04-06 16:23:11,515 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-04-06 16:23:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:11,515 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-04-06 16:23:11,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 16:23:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-04-06 16:23:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 16:23:11,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:11,516 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:11,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:11,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:23:11,734 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-04-06 16:23:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:11,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431740998] [2022-04-06 16:23:11,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-04-06 16:23:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:11,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343243849] [2022-04-06 16:23:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:11,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109691416] [2022-04-06 16:23:11,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:11,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:11,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:11,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:11,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:23:11,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:11,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:23:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 16:23:12,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 16:23:12,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343243849] [2022-04-06 16:23:12,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109691416] [2022-04-06 16:23:12,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109691416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:12,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:12,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 16:23:12,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431740998] [2022-04-06 16:23:12,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431740998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:12,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:12,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:23:12,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256738004] [2022-04-06 16:23:12,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:12,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:23:12,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:23:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:23:12,273 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 16:23:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:12,422 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-04-06 16:23:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-04-06 16:23:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:12,424 INFO L225 Difference]: With dead ends: 160 [2022-04-06 16:23:12,424 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 16:23:12,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:23:12,425 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:12,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 132 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:23:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 16:23:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 16:23:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:23:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-04-06 16:23:12,436 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-04-06 16:23:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:12,436 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-04-06 16:23:12,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 16:23:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-04-06 16:23:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:23:12,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:12,436 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:12,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:12,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:12,666 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-04-06 16:23:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:12,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2091754256] [2022-04-06 16:23:12,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-04-06 16:23:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:12,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649992161] [2022-04-06 16:23:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:12,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:12,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334838266] [2022-04-06 16:23:12,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:12,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:12,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:12,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:23:12,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:23:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:23:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:23:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649992161] [2022-04-06 16:23:12,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334838266] [2022-04-06 16:23:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334838266] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:12,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:12,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 16:23:12,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2091754256] [2022-04-06 16:23:12,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2091754256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:12,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:12,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:23:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167047741] [2022-04-06 16:23:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:12,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:23:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:23:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:23:12,955 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:23:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:13,015 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-04-06 16:23:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:23:13,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 16:23:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:13,016 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:23:13,016 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 16:23:13,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:23:13,017 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:13,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 16:23:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 16:23:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:23:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-04-06 16:23:13,031 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-04-06 16:23:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:13,031 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-04-06 16:23:13,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:23:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-04-06 16:23:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:23:13,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:13,032 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:13,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:13,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 16:23:13,247 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-04-06 16:23:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:13,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [553470614] [2022-04-06 16:23:13,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-04-06 16:23:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:13,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49366199] [2022-04-06 16:23:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:13,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:13,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674164358] [2022-04-06 16:23:13,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:13,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:13,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:23:13,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:23:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:23:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 16:23:13,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49366199] [2022-04-06 16:23:13,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674164358] [2022-04-06 16:23:13,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674164358] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:23:13,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:23:13,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 16:23:13,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [553470614] [2022-04-06 16:23:13,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [553470614] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:13,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:13,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:23:13,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578254173] [2022-04-06 16:23:13,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:13,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:23:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:13,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:23:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:23:13,621 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:23:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:13,659 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-04-06 16:23:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:23:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-04-06 16:23:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:13,661 INFO L225 Difference]: With dead ends: 179 [2022-04-06 16:23:13,661 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 16:23:13,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:23:13,661 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:13,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 16:23:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-04-06 16:23:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 16:23:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-04-06 16:23:13,674 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-04-06 16:23:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:13,674 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-04-06 16:23:13,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:23:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-04-06 16:23:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 16:23:13,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:13,675 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:13,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:13,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 16:23:13,891 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-04-06 16:23:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517010211] [2022-04-06 16:23:13,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-04-06 16:23:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826482473] [2022-04-06 16:23:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:13,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:13,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183272112] [2022-04-06 16:23:13,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:23:13,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:13,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:13,899 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:13,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:23:13,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:23:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 16:23:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 16:23:14,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 16:23:14,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826482473] [2022-04-06 16:23:14,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183272112] [2022-04-06 16:23:14,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183272112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:14,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:14,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 16:23:14,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517010211] [2022-04-06 16:23:14,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517010211] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:14,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:14,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:23:14,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245778312] [2022-04-06 16:23:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:14,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:23:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:23:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:23:14,490 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:23:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:14,710 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-04-06 16:23:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 16:23:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:14,712 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:23:14,712 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:23:14,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:14,712 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:14,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 168 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:23:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:23:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-04-06 16:23:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 16:23:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-04-06 16:23:14,728 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-04-06 16:23:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:14,728 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-04-06 16:23:14,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:23:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-04-06 16:23:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 16:23:14,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:14,729 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:14,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:14,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 16:23:14,947 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-04-06 16:23:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:14,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503889313] [2022-04-06 16:23:14,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-04-06 16:23:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:14,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517139970] [2022-04-06 16:23:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:14,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685032513] [2022-04-06 16:23:14,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:14,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:14,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:14,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:23:15,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:23:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 16:23:15,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 16:23:15,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517139970] [2022-04-06 16:23:15,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:15,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685032513] [2022-04-06 16:23:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685032513] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:15,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:15,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 16:23:15,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:15,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503889313] [2022-04-06 16:23:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503889313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:15,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:15,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:23:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911969808] [2022-04-06 16:23:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:15,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:23:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:23:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:23:15,591 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:23:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:15,873 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-04-06 16:23:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 16:23:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:15,875 INFO L225 Difference]: With dead ends: 208 [2022-04-06 16:23:15,875 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 16:23:15,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:23:15,876 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:15,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 195 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:23:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 16:23:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-04-06 16:23:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 16:23:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-04-06 16:23:15,891 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-04-06 16:23:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:15,891 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-04-06 16:23:15,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:23:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-04-06 16:23:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 16:23:15,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:15,892 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:15,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:16,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 16:23:16,103 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-04-06 16:23:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076045233] [2022-04-06 16:23:16,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-04-06 16:23:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137804510] [2022-04-06 16:23:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:16,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054943073] [2022-04-06 16:23:16,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:23:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:16,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:23:16,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:23:16,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:16,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 16:23:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:23:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:23:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137804510] [2022-04-06 16:23:16,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054943073] [2022-04-06 16:23:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054943073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:16,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:16,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 16:23:16,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076045233] [2022-04-06 16:23:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076045233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:16,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:16,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:23:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220127523] [2022-04-06 16:23:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:16,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:23:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:23:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:23:16,566 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:23:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:16,763 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-04-06 16:23:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:23:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-04-06 16:23:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:16,764 INFO L225 Difference]: With dead ends: 214 [2022-04-06 16:23:16,764 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 16:23:16,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:16,765 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:16,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 215 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:23:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 16:23:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-04-06 16:23:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 16:23:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-04-06 16:23:16,780 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-04-06 16:23:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:16,780 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-04-06 16:23:16,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:23:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-04-06 16:23:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 16:23:16,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:16,781 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:16,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:16,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:16,997 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-04-06 16:23:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:16,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022076935] [2022-04-06 16:23:16,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-04-06 16:23:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837343562] [2022-04-06 16:23:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:17,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:17,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345155040] [2022-04-06 16:23:17,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:17,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:17,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:23:17,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:23:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 16:23:17,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 16:23:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837343562] [2022-04-06 16:23:17,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345155040] [2022-04-06 16:23:17,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345155040] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:17,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:17,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 16:23:17,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022076935] [2022-04-06 16:23:17,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022076935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:17,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:17,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:23:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876027591] [2022-04-06 16:23:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:17,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:23:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:23:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:23:17,610 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:23:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:17,837 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-04-06 16:23:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-04-06 16:23:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:17,838 INFO L225 Difference]: With dead ends: 219 [2022-04-06 16:23:17,838 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 16:23:17,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:17,839 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:17,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 185 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:23:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 16:23:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-04-06 16:23:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:23:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-04-06 16:23:17,856 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-04-06 16:23:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:17,856 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-04-06 16:23:17,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:23:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-04-06 16:23:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 16:23:17,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:17,857 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:17,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:18,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:23:18,073 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-04-06 16:23:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463703177] [2022-04-06 16:23:18,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-04-06 16:23:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414825348] [2022-04-06 16:23:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:18,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:18,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324569533] [2022-04-06 16:23:18,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:23:18,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:18,080 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:18,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:23:18,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 16:23:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:23:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 16:23:18,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 16:23:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414825348] [2022-04-06 16:23:18,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324569533] [2022-04-06 16:23:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324569533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:18,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:18,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 16:23:18,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:18,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463703177] [2022-04-06 16:23:18,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463703177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:18,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:18,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:23:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180240501] [2022-04-06 16:23:18,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:18,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:23:18,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:23:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:23:18,375 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:23:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:18,440 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-04-06 16:23:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:23:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-04-06 16:23:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:18,441 INFO L225 Difference]: With dead ends: 277 [2022-04-06 16:23:18,442 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 16:23:18,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:23:18,442 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:18,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:23:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 16:23:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-04-06 16:23:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 16:23:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-04-06 16:23:18,459 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-04-06 16:23:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:18,459 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-04-06 16:23:18,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:23:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-04-06 16:23:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:23:18,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:18,460 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:18,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:18,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:23:18,676 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-04-06 16:23:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224583104] [2022-04-06 16:23:18,677 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-04-06 16:23:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022804108] [2022-04-06 16:23:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:18,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922913262] [2022-04-06 16:23:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:18,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:18,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:23:18,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:23:18,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 16:23:19,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:23:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022804108] [2022-04-06 16:23:19,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922913262] [2022-04-06 16:23:19,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922913262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:19,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 16:23:19,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224583104] [2022-04-06 16:23:19,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224583104] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:19,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:23:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883405748] [2022-04-06 16:23:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:19,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:23:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:23:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:23:19,350 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:23:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:19,726 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-04-06 16:23:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:23:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 16:23:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:19,728 INFO L225 Difference]: With dead ends: 256 [2022-04-06 16:23:19,728 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 16:23:19,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:23:19,729 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:19,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 235 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:23:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 16:23:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-04-06 16:23:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:23:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-04-06 16:23:19,748 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-04-06 16:23:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:19,748 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-04-06 16:23:19,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:23:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-04-06 16:23:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:23:19,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:19,749 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:19,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:19,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:19,967 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-04-06 16:23:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145107672] [2022-04-06 16:23:19,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-04-06 16:23:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:19,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71287590] [2022-04-06 16:23:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:19,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517534604] [2022-04-06 16:23:19,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:19,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:19,974 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:19,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:23:20,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:23:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:23:20,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:23:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71287590] [2022-04-06 16:23:20,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517534604] [2022-04-06 16:23:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517534604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:20,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:20,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 16:23:20,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145107672] [2022-04-06 16:23:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145107672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:20,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:20,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:23:20,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536647144] [2022-04-06 16:23:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:20,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:23:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:23:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:23:20,831 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:23:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:21,154 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-04-06 16:23:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:23:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 16:23:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:21,155 INFO L225 Difference]: With dead ends: 286 [2022-04-06 16:23:21,155 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 16:23:21,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:23:21,156 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:21,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 248 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:23:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 16:23:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-04-06 16:23:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 16:23:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-04-06 16:23:21,185 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-04-06 16:23:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:21,186 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-04-06 16:23:21,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:23:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-04-06 16:23:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:23:21,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:21,186 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:21,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 16:23:21,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:21,399 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-04-06 16:23:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:21,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986595029] [2022-04-06 16:23:21,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-04-06 16:23:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:21,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032243469] [2022-04-06 16:23:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:21,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788319698] [2022-04-06 16:23:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:21,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:21,409 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:21,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:23:21,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:21,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 16:23:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 41 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:23:22,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 16:23:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032243469] [2022-04-06 16:23:22,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788319698] [2022-04-06 16:23:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788319698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:22,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-04-06 16:23:22,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986595029] [2022-04-06 16:23:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986595029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:22,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:23:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58175620] [2022-04-06 16:23:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:22,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:23:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:23:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:22,567 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 16:23:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:23,314 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-04-06 16:23:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:23:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2022-04-06 16:23:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:23,317 INFO L225 Difference]: With dead ends: 297 [2022-04-06 16:23:23,317 INFO L226 Difference]: Without dead ends: 295 [2022-04-06 16:23:23,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:23:23,317 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:23,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 241 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 7 Unchecked, 0.7s Time] [2022-04-06 16:23:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-06 16:23:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-04-06 16:23:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 16:23:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-04-06 16:23:23,348 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-04-06 16:23:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:23,348 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-04-06 16:23:23,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 16:23:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-04-06 16:23:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:23:23,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:23,356 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:23,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:23,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:23,571 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-04-06 16:23:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447916456] [2022-04-06 16:23:23,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-04-06 16:23:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:23,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440250832] [2022-04-06 16:23:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:23,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:23,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051398944] [2022-04-06 16:23:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:23:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:23,585 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:23,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:23:23,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:23:23,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:23:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 16:23:23,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:24,253 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:23:24,255 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:23:30,339 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (+ (* (- 1) c_main_~q~0) c_main_~p~0))) (let ((.cse0 (= c_main_~y~0 0)) (.cse4 (+ c_main_~b~0 (* (- 1) c_main_~q~0 c_main_~x~0))) (.cse1 (* .cse5 c_main_~x~0)) (.cse3 (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (and (let ((.cse6 (div .cse4 c_main_~y~0))) (let ((.cse2 (+ c_main_~r~0 (* (- 1) .cse6)))) (or .cse0 (= (+ .cse1 (* .cse2 c_main_~y~0)) .cse3) (not (= (mod .cse4 c_main_~y~0) 0)) (not (= (+ (* c_main_~q~0 .cse2) 1) (* .cse5 .cse6)))))) (or (not .cse0) (not (= .cse4 0)) (let ((.cse8 (= c_main_~p~0 0)) (.cse7 (+ (* c_main_~q~0 c_main_~r~0) 1))) (and (or (not (= .cse7 0)) (forall ((main_~s~0 Int)) (= (+ (* (+ (* (- 1) c_main_~q~0) c_main_~p~0) c_main_~x~0) (* (+ (* (- 1) main_~s~0) c_main_~r~0) c_main_~y~0)) (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (not .cse8)) (or .cse8 (not (= (mod .cse7 c_main_~p~0) 0)) (= (+ .cse1 (* (+ c_main_~r~0 (* (div .cse7 c_main_~p~0) (- 1))) c_main_~y~0)) .cse3)))))))) is different from true [2022-04-06 16:23:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440250832] [2022-04-06 16:23:30,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051398944] [2022-04-06 16:23:30,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051398944] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:23:30,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:23:30,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:23:30,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447916456] [2022-04-06 16:23:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447916456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:30,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:30,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:23:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621857254] [2022-04-06 16:23:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:30,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:23:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:23:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2022-04-06 16:23:30,343 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:23:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:30,935 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-04-06 16:23:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:23:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-04-06 16:23:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:30,939 INFO L225 Difference]: With dead ends: 315 [2022-04-06 16:23:30,939 INFO L226 Difference]: Without dead ends: 309 [2022-04-06 16:23:30,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=61, Invalid=214, Unknown=1, NotChecked=30, Total=306 [2022-04-06 16:23:30,940 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:30,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 198 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:23:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-06 16:23:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-04-06 16:23:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 16:23:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-04-06 16:23:30,981 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-04-06 16:23:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:30,981 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-04-06 16:23:30,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:23:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-04-06 16:23:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:23:30,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:30,982 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:31,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:31,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:23:31,201 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-04-06 16:23:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1859268552] [2022-04-06 16:23:31,202 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-04-06 16:23:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:31,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583137059] [2022-04-06 16:23:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:31,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718566469] [2022-04-06 16:23:31,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:23:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:31,210 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:31,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:23:31,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:23:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:23:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 16:23:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 16:23:32,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583137059] [2022-04-06 16:23:32,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718566469] [2022-04-06 16:23:32,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718566469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:32,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:32,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:23:32,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1859268552] [2022-04-06 16:23:32,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1859268552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:32,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:32,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:23:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838358477] [2022-04-06 16:23:32,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:32,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:23:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:23:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:23:32,551 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:23:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:32,942 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-04-06 16:23:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:23:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-04-06 16:23:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:32,943 INFO L225 Difference]: With dead ends: 291 [2022-04-06 16:23:32,943 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 16:23:32,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:23:32,944 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:32,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 270 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:23:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 16:23:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-04-06 16:23:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:23:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-04-06 16:23:32,981 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-04-06 16:23:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:32,982 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-04-06 16:23:32,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:23:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-04-06 16:23:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:23:32,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:32,982 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:33,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:23:33,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 16:23:33,192 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-04-06 16:23:33,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:33,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123676250] [2022-04-06 16:23:33,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-04-06 16:23:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:33,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163359920] [2022-04-06 16:23:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:33,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:33,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531439605] [2022-04-06 16:23:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:23:33,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:33,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:33,202 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:33,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:23:33,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:23:33,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 16:23:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:33,963 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:23:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 62 proven. 50 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 16:23:36,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 16:23:36,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163359920] [2022-04-06 16:23:36,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531439605] [2022-04-06 16:23:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531439605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:36,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:36,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 16:23:36,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123676250] [2022-04-06 16:23:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123676250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:36,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:36,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:23:36,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759095579] [2022-04-06 16:23:36,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:36,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:23:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:23:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:23:36,767 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:23:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:23:37,792 INFO L93 Difference]: Finished difference Result 302 states and 371 transitions. [2022-04-06 16:23:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:23:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-04-06 16:23:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:23:37,793 INFO L225 Difference]: With dead ends: 302 [2022-04-06 16:23:37,794 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 16:23:37,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:23:37,794 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:23:37,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 16:23:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 16:23:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 276. [2022-04-06 16:23:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 182 states have internal predecessors, (198), 68 states have call successors, (68), 35 states have call predecessors, (68), 34 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 16:23:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 330 transitions. [2022-04-06 16:23:37,830 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 330 transitions. Word has length 90 [2022-04-06 16:23:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:23:37,830 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 330 transitions. [2022-04-06 16:23:37,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:23:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 330 transitions. [2022-04-06 16:23:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:23:37,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:23:37,831 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:23:37,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 16:23:38,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:38,047 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:23:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:23:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-04-06 16:23:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:38,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318348336] [2022-04-06 16:23:38,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:23:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-04-06 16:23:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:23:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542623153] [2022-04-06 16:23:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:23:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:23:38,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:23:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112821664] [2022-04-06 16:23:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:23:38,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:23:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:23:38,057 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:23:38,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:23:38,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:23:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:23:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:23:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:23:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 16:23:41,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:23:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 16:23:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:23:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542623153] [2022-04-06 16:23:47,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:23:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112821664] [2022-04-06 16:23:47,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112821664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:23:47,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:23:47,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:23:47,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:23:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318348336] [2022-04-06 16:23:47,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318348336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:23:47,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:23:47,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:23:47,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874108232] [2022-04-06 16:23:47,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:23:47,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:23:47,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:23:47,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:23:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-04-06 16:23:47,709 INFO L87 Difference]: Start difference. First operand 276 states and 330 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:23:49,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:23:51,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:23:53,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:02,080 WARN L232 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 47 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:24:04,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:06,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:08,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:10,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:12,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:14,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:16,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:18,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:20,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:22,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:24,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:26,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:28,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:30,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:32,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:34,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:36,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:38,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:41,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:43,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:45,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:46,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:48,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:50,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:52,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:54,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:56,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:24:58,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:00,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:00,569 INFO L93 Difference]: Finished difference Result 337 states and 427 transitions. [2022-04-06 16:25:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:25:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-04-06 16:25:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:00,571 INFO L225 Difference]: With dead ends: 337 [2022-04-06 16:25:00,571 INFO L226 Difference]: Without dead ends: 318 [2022-04-06 16:25:00,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-04-06 16:25:00,571 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 27 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 21 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:00,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 240 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 509 Invalid, 29 Unknown, 0 Unchecked, 65.2s Time] [2022-04-06 16:25:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-06 16:25:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2022-04-06 16:25:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 195 states have (on average 1.1692307692307693) internal successors, (228), 202 states have internal predecessors, (228), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-04-06 16:25:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2022-04-06 16:25:00,637 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 90 [2022-04-06 16:25:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:00,637 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2022-04-06 16:25:00,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:25:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2022-04-06 16:25:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 16:25:00,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:00,638 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:00,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:00,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:00,852 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-04-06 16:25:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926804669] [2022-04-06 16:25:00,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-04-06 16:25:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17435596] [2022-04-06 16:25:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:00,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:00,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:00,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539625259] [2022-04-06 16:25:00,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:00,861 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:00,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:25:00,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:25:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:25:01,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:25:01,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17435596] [2022-04-06 16:25:01,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539625259] [2022-04-06 16:25:01,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539625259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:01,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:01,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:25:01,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926804669] [2022-04-06 16:25:01,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926804669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:01,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:01,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:25:01,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008381023] [2022-04-06 16:25:01,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:01,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:25:01,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:25:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:01,232 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:25:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:01,357 INFO L93 Difference]: Finished difference Result 398 states and 478 transitions. [2022-04-06 16:25:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:25:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-04-06 16:25:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:01,359 INFO L225 Difference]: With dead ends: 398 [2022-04-06 16:25:01,359 INFO L226 Difference]: Without dead ends: 375 [2022-04-06 16:25:01,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:25:01,360 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:01,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-04-06 16:25:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 360. [2022-04-06 16:25:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 234 states have (on average 1.1367521367521367) internal successors, (266), 242 states have internal predecessors, (266), 81 states have call successors, (81), 45 states have call predecessors, (81), 44 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:25:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 424 transitions. [2022-04-06 16:25:01,415 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 424 transitions. Word has length 99 [2022-04-06 16:25:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:01,416 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 424 transitions. [2022-04-06 16:25:01,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:25:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 424 transitions. [2022-04-06 16:25:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:01,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:01,416 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:01,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 16:25:01,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:25:01,633 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-04-06 16:25:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:01,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115773874] [2022-04-06 16:25:01,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:01,634 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-04-06 16:25:01,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:01,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731947784] [2022-04-06 16:25:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:01,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:01,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553014385] [2022-04-06 16:25:01,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:01,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:01,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:01,640 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:01,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:25:01,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:01,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:25:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 16:25:03,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 16:25:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731947784] [2022-04-06 16:25:03,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553014385] [2022-04-06 16:25:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553014385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:03,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:03,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-04-06 16:25:03,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115773874] [2022-04-06 16:25:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115773874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:03,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:03,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:25:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675634269] [2022-04-06 16:25:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:03,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:25:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:25:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:25:03,780 INFO L87 Difference]: Start difference. First operand 360 states and 424 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:04,560 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2022-04-06 16:25:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:25:04,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:04,562 INFO L225 Difference]: With dead ends: 387 [2022-04-06 16:25:04,562 INFO L226 Difference]: Without dead ends: 385 [2022-04-06 16:25:04,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:04,562 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 15 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:04,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 262 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:25:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-04-06 16:25:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 380. [2022-04-06 16:25:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 246 states have (on average 1.146341463414634) internal successors, (282), 254 states have internal predecessors, (282), 87 states have call successors, (87), 47 states have call predecessors, (87), 46 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:25:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 452 transitions. [2022-04-06 16:25:04,639 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 452 transitions. Word has length 104 [2022-04-06 16:25:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:04,639 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 452 transitions. [2022-04-06 16:25:04,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 452 transitions. [2022-04-06 16:25:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:04,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:04,640 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:04,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:25:04,856 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-04-06 16:25:04,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:04,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569789540] [2022-04-06 16:25:04,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-04-06 16:25:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:04,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130041792] [2022-04-06 16:25:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:04,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:04,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660949256] [2022-04-06 16:25:04,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:04,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:04,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:04,862 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:04,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:25:04,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:25:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:25:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:25:06,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130041792] [2022-04-06 16:25:06,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660949256] [2022-04-06 16:25:06,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660949256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:06,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:06,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 16:25:06,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569789540] [2022-04-06 16:25:06,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569789540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:06,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:06,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:25:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031407885] [2022-04-06 16:25:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:06,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:25:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:25:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:25:06,608 INFO L87 Difference]: Start difference. First operand 380 states and 452 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:07,168 INFO L93 Difference]: Finished difference Result 428 states and 513 transitions. [2022-04-06 16:25:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:25:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 16:25:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:07,181 INFO L225 Difference]: With dead ends: 428 [2022-04-06 16:25:07,181 INFO L226 Difference]: Without dead ends: 426 [2022-04-06 16:25:07,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:25:07,181 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:07,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 325 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:25:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-04-06 16:25:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 410. [2022-04-06 16:25:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 274 states have internal predecessors, (304), 93 states have call successors, (93), 51 states have call predecessors, (93), 50 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-04-06 16:25:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 486 transitions. [2022-04-06 16:25:07,251 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 486 transitions. Word has length 104 [2022-04-06 16:25:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:07,252 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 486 transitions. [2022-04-06 16:25:07,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 486 transitions. [2022-04-06 16:25:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:07,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:07,253 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:07,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:07,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:25:07,467 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-04-06 16:25:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:07,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933525039] [2022-04-06 16:25:07,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-04-06 16:25:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:07,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554731338] [2022-04-06 16:25:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:07,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:07,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:07,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858052860] [2022-04-06 16:25:07,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:07,475 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:07,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:25:07,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 16:25:07,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 85 proven. 110 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 16:25:08,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-04-06 16:25:08,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554731338] [2022-04-06 16:25:08,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858052860] [2022-04-06 16:25:08,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858052860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:08,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:08,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 16:25:08,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933525039] [2022-04-06 16:25:08,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933525039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:08,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:08,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:25:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158138411] [2022-04-06 16:25:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:08,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:25:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:25:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:25:08,599 INFO L87 Difference]: Start difference. First operand 410 states and 486 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:09,424 INFO L93 Difference]: Finished difference Result 465 states and 548 transitions. [2022-04-06 16:25:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:25:09,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:09,427 INFO L225 Difference]: With dead ends: 465 [2022-04-06 16:25:09,427 INFO L226 Difference]: Without dead ends: 463 [2022-04-06 16:25:09,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:25:09,427 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 31 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:09,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 289 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:25:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-04-06 16:25:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 417. [2022-04-06 16:25:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 273 states have (on average 1.1391941391941391) internal successors, (311), 280 states have internal predecessors, (311), 90 states have call successors, (90), 54 states have call predecessors, (90), 53 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 16:25:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 487 transitions. [2022-04-06 16:25:09,541 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 487 transitions. Word has length 104 [2022-04-06 16:25:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:09,542 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 487 transitions. [2022-04-06 16:25:09,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 487 transitions. [2022-04-06 16:25:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:09,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:09,543 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:09,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:09,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:25:09,743 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-04-06 16:25:09,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [566380267] [2022-04-06 16:25:09,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-04-06 16:25:09,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33115129] [2022-04-06 16:25:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:09,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:09,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006374475] [2022-04-06 16:25:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:09,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:09,754 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:09,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:25:10,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 16:25:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:25:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 16:25:12,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:13,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33115129] [2022-04-06 16:25:13,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006374475] [2022-04-06 16:25:13,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006374475] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:25:13,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:25:13,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:25:13,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [566380267] [2022-04-06 16:25:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [566380267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:13,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:13,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:25:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66094744] [2022-04-06 16:25:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:13,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:25:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:25:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:25:13,738 INFO L87 Difference]: Start difference. First operand 417 states and 487 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:25:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:18,628 INFO L93 Difference]: Finished difference Result 509 states and 621 transitions. [2022-04-06 16:25:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:25:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-04-06 16:25:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:18,630 INFO L225 Difference]: With dead ends: 509 [2022-04-06 16:25:18,630 INFO L226 Difference]: Without dead ends: 503 [2022-04-06 16:25:18,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:25:18,631 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 42 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:18,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 256 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 16:25:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-04-06 16:25:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 471. [2022-04-06 16:25:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 307 states have (on average 1.1498371335504887) internal successors, (353), 315 states have internal predecessors, (353), 105 states have call successors, (105), 59 states have call predecessors, (105), 58 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2022-04-06 16:25:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 559 transitions. [2022-04-06 16:25:18,738 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 559 transitions. Word has length 104 [2022-04-06 16:25:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:18,739 INFO L478 AbstractCegarLoop]: Abstraction has 471 states and 559 transitions. [2022-04-06 16:25:18,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:25:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 559 transitions. [2022-04-06 16:25:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:18,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:18,740 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:18,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 16:25:18,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:18,947 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-04-06 16:25:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:18,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610780267] [2022-04-06 16:25:18,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-04-06 16:25:18,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:18,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388750755] [2022-04-06 16:25:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:18,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:18,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93844693] [2022-04-06 16:25:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:18,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:18,962 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:18,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:25:19,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 16:25:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 16:25:20,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 16:25:21,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388750755] [2022-04-06 16:25:21,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93844693] [2022-04-06 16:25:21,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93844693] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:21,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:21,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-04-06 16:25:21,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:21,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610780267] [2022-04-06 16:25:21,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610780267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:21,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:21,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:25:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418603619] [2022-04-06 16:25:21,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:21,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:25:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:21,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:25:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:21,038 INFO L87 Difference]: Start difference. First operand 471 states and 559 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:22,554 INFO L93 Difference]: Finished difference Result 500 states and 600 transitions. [2022-04-06 16:25:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:25:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:22,557 INFO L225 Difference]: With dead ends: 500 [2022-04-06 16:25:22,557 INFO L226 Difference]: Without dead ends: 498 [2022-04-06 16:25:22,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:25:22,558 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:22,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 344 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 710 Invalid, 0 Unknown, 76 Unchecked, 1.4s Time] [2022-04-06 16:25:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-04-06 16:25:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2022-04-06 16:25:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 307 states have (on average 1.1498371335504887) internal successors, (353), 315 states have internal predecessors, (353), 105 states have call successors, (105), 59 states have call predecessors, (105), 58 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2022-04-06 16:25:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 559 transitions. [2022-04-06 16:25:22,648 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 559 transitions. Word has length 104 [2022-04-06 16:25:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:22,648 INFO L478 AbstractCegarLoop]: Abstraction has 471 states and 559 transitions. [2022-04-06 16:25:22,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 559 transitions. [2022-04-06 16:25:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:22,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:22,649 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:22,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:22,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:22,859 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-04-06 16:25:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:22,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517754631] [2022-04-06 16:25:22,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-04-06 16:25:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:22,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016212584] [2022-04-06 16:25:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:22,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602835330] [2022-04-06 16:25:22,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:22,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:25:22,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:22,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:25:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 16:25:23,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 100 proven. 45 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:25:24,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:24,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016212584] [2022-04-06 16:25:24,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602835330] [2022-04-06 16:25:24,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602835330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:24,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:24,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-04-06 16:25:24,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517754631] [2022-04-06 16:25:24,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517754631] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:24,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:24,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:25:24,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108433949] [2022-04-06 16:25:24,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:24,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:25:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:25:24,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:25:24,366 INFO L87 Difference]: Start difference. First operand 471 states and 559 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:25,419 INFO L93 Difference]: Finished difference Result 502 states and 601 transitions. [2022-04-06 16:25:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:25:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:25,421 INFO L225 Difference]: With dead ends: 502 [2022-04-06 16:25:25,421 INFO L226 Difference]: Without dead ends: 500 [2022-04-06 16:25:25,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:25:25,423 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:25,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 251 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:25:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-04-06 16:25:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 484. [2022-04-06 16:25:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 315 states have (on average 1.1492063492063491) internal successors, (362), 323 states have internal predecessors, (362), 108 states have call successors, (108), 61 states have call predecessors, (108), 60 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-04-06 16:25:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 574 transitions. [2022-04-06 16:25:25,520 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 574 transitions. Word has length 104 [2022-04-06 16:25:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:25,521 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 574 transitions. [2022-04-06 16:25:25,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 574 transitions. [2022-04-06 16:25:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:25,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:25,522 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:25,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:25,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 16:25:25,738 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-04-06 16:25:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35107154] [2022-04-06 16:25:25,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-04-06 16:25:25,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:25,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247807745] [2022-04-06 16:25:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:25,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:25,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:25,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768973427] [2022-04-06 16:25:25,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:25,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:25,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:25:26,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:25:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 16:25:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 16:25:27,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 16:25:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247807745] [2022-04-06 16:25:31,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768973427] [2022-04-06 16:25:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768973427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:31,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:31,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 16:25:31,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35107154] [2022-04-06 16:25:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35107154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:31,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:31,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:25:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289004818] [2022-04-06 16:25:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:31,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:25:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:25:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-04-06 16:25:31,770 INFO L87 Difference]: Start difference. First operand 484 states and 574 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:25:34,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:34,917 INFO L93 Difference]: Finished difference Result 563 states and 685 transitions. [2022-04-06 16:25:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:25:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-04-06 16:25:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:34,920 INFO L225 Difference]: With dead ends: 563 [2022-04-06 16:25:34,920 INFO L226 Difference]: Without dead ends: 561 [2022-04-06 16:25:34,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-04-06 16:25:34,921 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:34,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 199 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 16:25:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-04-06 16:25:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 509. [2022-04-06 16:25:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 330 states have (on average 1.1454545454545455) internal successors, (378), 341 states have internal predecessors, (378), 115 states have call successors, (115), 64 states have call predecessors, (115), 63 states have return successors, (111), 103 states have call predecessors, (111), 111 states have call successors, (111) [2022-04-06 16:25:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 604 transitions. [2022-04-06 16:25:35,046 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 604 transitions. Word has length 104 [2022-04-06 16:25:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:35,046 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 604 transitions. [2022-04-06 16:25:35,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:25:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 604 transitions. [2022-04-06 16:25:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:25:35,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:35,047 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:35,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:35,253 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-04-06 16:25:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [516420548] [2022-04-06 16:25:35,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-04-06 16:25:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685310622] [2022-04-06 16:25:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:35,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:35,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833049119] [2022-04-06 16:25:35,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:35,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:35,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:35,263 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:35,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:25:35,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:25:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 16:25:35,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 16:25:35,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685310622] [2022-04-06 16:25:35,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833049119] [2022-04-06 16:25:35,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833049119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:35,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:25:35,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [516420548] [2022-04-06 16:25:35,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [516420548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:35,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:25:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825722422] [2022-04-06 16:25:35,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:35,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:25:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:25:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:35,945 INFO L87 Difference]: Start difference. First operand 509 states and 604 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:25:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:36,311 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2022-04-06 16:25:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:25:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-04-06 16:25:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:36,316 INFO L225 Difference]: With dead ends: 535 [2022-04-06 16:25:36,316 INFO L226 Difference]: Without dead ends: 529 [2022-04-06 16:25:36,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:25:36,317 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:36,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 290 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:25:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-04-06 16:25:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-04-06 16:25:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 341 states have (on average 1.1495601173020529) internal successors, (392), 352 states have internal predecessors, (392), 121 states have call successors, (121), 65 states have call predecessors, (121), 64 states have return successors, (117), 109 states have call predecessors, (117), 117 states have call successors, (117) [2022-04-06 16:25:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 630 transitions. [2022-04-06 16:25:36,441 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 630 transitions. Word has length 109 [2022-04-06 16:25:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:36,441 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 630 transitions. [2022-04-06 16:25:36,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:25:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 630 transitions. [2022-04-06 16:25:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:25:36,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:36,442 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:36,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:36,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:36,659 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-04-06 16:25:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299688779] [2022-04-06 16:25:36,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-04-06 16:25:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562293716] [2022-04-06 16:25:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:36,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404181132] [2022-04-06 16:25:36,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:36,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:36,671 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:36,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:25:36,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 16:25:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 84 proven. 129 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 16:25:37,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 129 proven. 16 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 16:25:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:37,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562293716] [2022-04-06 16:25:37,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404181132] [2022-04-06 16:25:37,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404181132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:37,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:37,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 16:25:37,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299688779] [2022-04-06 16:25:37,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299688779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:37,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:37,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:25:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306439958] [2022-04-06 16:25:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:37,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:25:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:25:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:25:37,769 INFO L87 Difference]: Start difference. First operand 527 states and 630 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 16:25:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:39,204 INFO L93 Difference]: Finished difference Result 575 states and 693 transitions. [2022-04-06 16:25:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:25:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 109 [2022-04-06 16:25:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:39,207 INFO L225 Difference]: With dead ends: 575 [2022-04-06 16:25:39,207 INFO L226 Difference]: Without dead ends: 565 [2022-04-06 16:25:39,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:25:39,208 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 40 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:39,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 282 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 16:25:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-04-06 16:25:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 544. [2022-04-06 16:25:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 354 states have (on average 1.1468926553672316) internal successors, (406), 365 states have internal predecessors, (406), 122 states have call successors, (122), 68 states have call predecessors, (122), 67 states have return successors, (118), 110 states have call predecessors, (118), 118 states have call successors, (118) [2022-04-06 16:25:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 646 transitions. [2022-04-06 16:25:39,344 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 646 transitions. Word has length 109 [2022-04-06 16:25:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:39,345 INFO L478 AbstractCegarLoop]: Abstraction has 544 states and 646 transitions. [2022-04-06 16:25:39,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 16:25:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 646 transitions. [2022-04-06 16:25:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:25:39,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:39,346 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:39,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:39,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:25:39,563 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-04-06 16:25:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783440846] [2022-04-06 16:25:39,563 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-04-06 16:25:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470523880] [2022-04-06 16:25:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:39,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619390953] [2022-04-06 16:25:39,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:39,569 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:39,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:25:40,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:25:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:25:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 16:25:40,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 16:25:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470523880] [2022-04-06 16:25:40,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619390953] [2022-04-06 16:25:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619390953] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:40,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:40,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 16:25:40,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783440846] [2022-04-06 16:25:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783440846] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:40,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:40,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:25:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565994893] [2022-04-06 16:25:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:40,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:25:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:25:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:25:40,881 INFO L87 Difference]: Start difference. First operand 544 states and 646 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:25:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:41,218 INFO L93 Difference]: Finished difference Result 554 states and 654 transitions. [2022-04-06 16:25:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:25:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-04-06 16:25:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:41,220 INFO L225 Difference]: With dead ends: 554 [2022-04-06 16:25:41,220 INFO L226 Difference]: Without dead ends: 533 [2022-04-06 16:25:41,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:41,221 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:41,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 119 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:25:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-04-06 16:25:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 490. [2022-04-06 16:25:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 326 states have (on average 1.1196319018404908) internal successors, (365), 337 states have internal predecessors, (365), 99 states have call successors, (99), 65 states have call predecessors, (99), 64 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2022-04-06 16:25:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 560 transitions. [2022-04-06 16:25:41,337 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 560 transitions. Word has length 109 [2022-04-06 16:25:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:41,337 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 560 transitions. [2022-04-06 16:25:41,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:25:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 560 transitions. [2022-04-06 16:25:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 16:25:41,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:41,338 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:41,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:41,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:25:41,545 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-04-06 16:25:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:41,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738101612] [2022-04-06 16:25:41,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-04-06 16:25:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:41,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589127582] [2022-04-06 16:25:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:41,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:41,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916318044] [2022-04-06 16:25:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:41,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:41,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:41,552 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:41,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 16:25:41,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:25:41,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:25:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:25:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589127582] [2022-04-06 16:25:42,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916318044] [2022-04-06 16:25:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916318044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:42,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:25:42,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738101612] [2022-04-06 16:25:42,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738101612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:42,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:42,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:25:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410312329] [2022-04-06 16:25:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:42,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:25:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:25:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:42,025 INFO L87 Difference]: Start difference. First operand 490 states and 560 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:25:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:42,264 INFO L93 Difference]: Finished difference Result 629 states and 731 transitions. [2022-04-06 16:25:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:25:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-04-06 16:25:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:42,266 INFO L225 Difference]: With dead ends: 629 [2022-04-06 16:25:42,266 INFO L226 Difference]: Without dead ends: 620 [2022-04-06 16:25:42,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:42,267 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 28 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:42,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-04-06 16:25:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 604. [2022-04-06 16:25:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 407 states have (on average 1.1203931203931203) internal successors, (456), 413 states have internal predecessors, (456), 119 states have call successors, (119), 78 states have call predecessors, (119), 77 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-04-06 16:25:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 691 transitions. [2022-04-06 16:25:42,425 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 691 transitions. Word has length 118 [2022-04-06 16:25:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:42,425 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 691 transitions. [2022-04-06 16:25:42,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:25:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 691 transitions. [2022-04-06 16:25:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 16:25:42,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:42,427 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:42,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:42,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 16:25:42,643 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-04-06 16:25:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738091971] [2022-04-06 16:25:42,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-04-06 16:25:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149712319] [2022-04-06 16:25:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:42,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424151342] [2022-04-06 16:25:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:42,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:42,660 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:42,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 16:25:42,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 16:25:42,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:25:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 16:25:42,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-04-06 16:25:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149712319] [2022-04-06 16:25:43,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424151342] [2022-04-06 16:25:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424151342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:43,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:43,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 16:25:43,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738091971] [2022-04-06 16:25:43,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738091971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:43,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:43,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:25:43,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083812181] [2022-04-06 16:25:43,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:43,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:25:43,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:25:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:43,178 INFO L87 Difference]: Start difference. First operand 604 states and 691 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:25:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:43,495 INFO L93 Difference]: Finished difference Result 749 states and 879 transitions. [2022-04-06 16:25:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:25:43,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-04-06 16:25:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:43,497 INFO L225 Difference]: With dead ends: 749 [2022-04-06 16:25:43,498 INFO L226 Difference]: Without dead ends: 740 [2022-04-06 16:25:43,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:25:43,498 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:43,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-04-06 16:25:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 738. [2022-04-06 16:25:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 493 states have (on average 1.1196754563894524) internal successors, (552), 501 states have internal predecessors, (552), 153 states have call successors, (153), 92 states have call predecessors, (153), 91 states have return successors, (150), 144 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 16:25:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 855 transitions. [2022-04-06 16:25:43,687 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 855 transitions. Word has length 137 [2022-04-06 16:25:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:43,687 INFO L478 AbstractCegarLoop]: Abstraction has 738 states and 855 transitions. [2022-04-06 16:25:43,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:25:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 855 transitions. [2022-04-06 16:25:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 16:25:43,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:43,689 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:43,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:43,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:43,903 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-04-06 16:25:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1626398582] [2022-04-06 16:25:43,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-04-06 16:25:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039703800] [2022-04-06 16:25:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:43,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690289082] [2022-04-06 16:25:43,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:43,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:43,910 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 16:25:43,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:25:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:25:44,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-04-06 16:25:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039703800] [2022-04-06 16:25:44,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690289082] [2022-04-06 16:25:44,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690289082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:44,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:44,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-06 16:25:44,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1626398582] [2022-04-06 16:25:44,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1626398582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:44,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:44,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:25:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740973162] [2022-04-06 16:25:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:44,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:25:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:25:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:44,446 INFO L87 Difference]: Start difference. First operand 738 states and 855 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:25:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:44,765 INFO L93 Difference]: Finished difference Result 883 states and 1043 transitions. [2022-04-06 16:25:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:25:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-04-06 16:25:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:44,784 INFO L225 Difference]: With dead ends: 883 [2022-04-06 16:25:44,785 INFO L226 Difference]: Without dead ends: 874 [2022-04-06 16:25:44,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:25:44,785 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:44,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 166 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-04-06 16:25:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2022-04-06 16:25:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 579 states have (on average 1.1191709844559585) internal successors, (648), 589 states have internal predecessors, (648), 187 states have call successors, (187), 106 states have call predecessors, (187), 105 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-04-06 16:25:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1019 transitions. [2022-04-06 16:25:45,010 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1019 transitions. Word has length 156 [2022-04-06 16:25:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:45,011 INFO L478 AbstractCegarLoop]: Abstraction has 872 states and 1019 transitions. [2022-04-06 16:25:45,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:25:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1019 transitions. [2022-04-06 16:25:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 16:25:45,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:45,013 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:45,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:45,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 16:25:45,229 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-04-06 16:25:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:45,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722474402] [2022-04-06 16:25:45,230 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-04-06 16:25:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:45,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697388597] [2022-04-06 16:25:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:45,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467183904] [2022-04-06 16:25:45,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:45,259 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:45,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 16:25:45,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:25:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:25:45,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-04-06 16:25:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697388597] [2022-04-06 16:25:45,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467183904] [2022-04-06 16:25:45,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467183904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:45,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:45,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-06 16:25:45,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:45,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722474402] [2022-04-06 16:25:45,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722474402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:45,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:45,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:25:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42204420] [2022-04-06 16:25:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:45,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:25:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:25:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:45,862 INFO L87 Difference]: Start difference. First operand 872 states and 1019 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 16:25:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:46,247 INFO L93 Difference]: Finished difference Result 1017 states and 1207 transitions. [2022-04-06 16:25:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 16:25:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-04-06 16:25:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:46,250 INFO L225 Difference]: With dead ends: 1017 [2022-04-06 16:25:46,250 INFO L226 Difference]: Without dead ends: 1008 [2022-04-06 16:25:46,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:25:46,251 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:46,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 218 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-04-06 16:25:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2022-04-06 16:25:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 665 states have (on average 1.118796992481203) internal successors, (744), 677 states have internal predecessors, (744), 221 states have call successors, (221), 120 states have call predecessors, (221), 119 states have return successors, (218), 208 states have call predecessors, (218), 218 states have call successors, (218) [2022-04-06 16:25:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1183 transitions. [2022-04-06 16:25:46,515 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1183 transitions. Word has length 175 [2022-04-06 16:25:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:46,516 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1183 transitions. [2022-04-06 16:25:46,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 16:25:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1183 transitions. [2022-04-06 16:25:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 16:25:46,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:46,518 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:46,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:46,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 16:25:46,735 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-04-06 16:25:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349532563] [2022-04-06 16:25:46,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-04-06 16:25:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531539418] [2022-04-06 16:25:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:46,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:46,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029722704] [2022-04-06 16:25:46,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:46,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:46,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:46,743 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:46,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 16:25:46,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 16:25:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:25:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 16:25:47,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-04-06 16:25:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531539418] [2022-04-06 16:25:47,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029722704] [2022-04-06 16:25:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029722704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:47,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:47,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-04-06 16:25:47,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349532563] [2022-04-06 16:25:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349532563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:47,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:47,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:25:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310846205] [2022-04-06 16:25:47,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:47,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:25:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:25:47,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:25:47,202 INFO L87 Difference]: Start difference. First operand 1006 states and 1183 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:25:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:47,601 INFO L93 Difference]: Finished difference Result 1151 states and 1371 transitions. [2022-04-06 16:25:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:25:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-04-06 16:25:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:47,605 INFO L225 Difference]: With dead ends: 1151 [2022-04-06 16:25:47,605 INFO L226 Difference]: Without dead ends: 1142 [2022-04-06 16:25:47,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:25:47,606 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:47,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 210 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:25:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-04-06 16:25:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1140. [2022-04-06 16:25:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 751 states have (on average 1.118508655126498) internal successors, (840), 765 states have internal predecessors, (840), 255 states have call successors, (255), 134 states have call predecessors, (255), 133 states have return successors, (252), 240 states have call predecessors, (252), 252 states have call successors, (252) [2022-04-06 16:25:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1347 transitions. [2022-04-06 16:25:47,925 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1347 transitions. Word has length 194 [2022-04-06 16:25:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:47,925 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1347 transitions. [2022-04-06 16:25:47,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:25:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1347 transitions. [2022-04-06 16:25:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 16:25:47,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:47,928 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:47,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:48,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:48,133 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-04-06 16:25:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:48,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945175498] [2022-04-06 16:25:48,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-04-06 16:25:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:48,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990953407] [2022-04-06 16:25:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:48,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157746601] [2022-04-06 16:25:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:48,156 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:48,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 16:25:48,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 16:25:48,231 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 16:25:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 16:25:48,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 16:25:48,346 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 16:25:48,346 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 16:25:48,348 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:25:48,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 16:25:48,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 16:25:48,566 INFO L719 BasicCegarLoop]: Path program histogram: [36, 20, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 16:25:48,569 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 16:25:48,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:25:48 BoogieIcfgContainer [2022-04-06 16:25:48,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 16:25:48,585 INFO L158 Benchmark]: Toolchain (without parser) took 162463.50ms. Allocated memory was 209.7MB in the beginning and 383.8MB in the end (delta: 174.1MB). Free memory was 151.1MB in the beginning and 229.2MB in the end (delta: -78.2MB). Peak memory consumption was 95.1MB. Max. memory is 8.0GB. [2022-04-06 16:25:48,585 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 209.7MB. Free memory is still 167.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:25:48,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.94ms. Allocated memory was 209.7MB in the beginning and 266.3MB in the end (delta: 56.6MB). Free memory was 150.9MB in the beginning and 236.4MB in the end (delta: -85.4MB). Peak memory consumption was 6.2MB. Max. memory is 8.0GB. [2022-04-06 16:25:48,585 INFO L158 Benchmark]: Boogie Preprocessor took 17.23ms. Allocated memory is still 266.3MB. Free memory was 236.4MB in the beginning and 234.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 16:25:48,585 INFO L158 Benchmark]: RCFGBuilder took 242.48ms. Allocated memory is still 266.3MB. Free memory was 234.9MB in the beginning and 224.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 16:25:48,585 INFO L158 Benchmark]: TraceAbstraction took 162029.45ms. Allocated memory was 266.3MB in the beginning and 383.8MB in the end (delta: 117.4MB). Free memory was 223.9MB in the beginning and 229.2MB in the end (delta: -5.3MB). Peak memory consumption was 113.0MB. Max. memory is 8.0GB. [2022-04-06 16:25:48,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 209.7MB. Free memory is still 167.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.94ms. Allocated memory was 209.7MB in the beginning and 266.3MB in the end (delta: 56.6MB). Free memory was 150.9MB in the beginning and 236.4MB in the end (delta: -85.4MB). Peak memory consumption was 6.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.23ms. Allocated memory is still 266.3MB. Free memory was 236.4MB in the beginning and 234.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 242.48ms. Allocated memory is still 266.3MB. Free memory was 234.9MB in the beginning and 224.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 162029.45ms. Allocated memory was 266.3MB in the beginning and 383.8MB in the end (delta: 117.4MB). Free memory was 223.9MB in the beginning and 229.2MB in the end (delta: -5.3MB). Peak memory consumption was 113.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<10) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 162.0s, OverallIterations: 42, TraceHistogramMax: 31, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.1s, AutomataDifference: 95.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 1029 SdHoareTripleChecker+Valid, 83.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 802 mSDsluCounter, 7855 SdHoareTripleChecker+Invalid, 82.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 83 IncrementalHoareTripleChecker+Unchecked, 5980 mSDsCounter, 654 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11477 IncrementalHoareTripleChecker+Invalid, 12244 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 654 mSolverCounterUnsat, 1875 mSDtfsCounter, 11477 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6558 GetRequests, 5938 SyntacticMatches, 55 SemanticMatches, 565 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 30.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1140occurred in iteration=41, InterpolantAutomatonStates: 436, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 41 MinimizatonAttempts, 558 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 proved your program to be incorrect! [2022-04-06 16:25:48,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...