/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-04 21:43:20,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 21:43:20,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 21:43:20,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 21:43:20,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-04 21:43:20,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 21:43:20,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 21:43:20,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 21:43:20,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 21:43:20,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 21:43:20,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 21:43:20,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 21:43:20,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 21:43:20,385 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 21:43:20,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 21:43:20,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 21:43:20,386 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 21:43:20,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 21:43:20,387 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 21:43:20,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 21:43:20,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 21:43:20,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 21:43:20,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 21:43:20,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 21:43:20,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 21:43:20,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 21:43:20,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 21:43:20,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 21:43:20,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 21:43:20,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 21:43:20,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 21:43:20,573 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 21:43:20,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-04-04 21:43:20,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd86c96/7eb6c1564dcd40d59d7dee79b4891e85/FLAGc04064e64 [2022-04-04 21:43:20,899 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 21:43:20,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-04-04 21:43:20,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd86c96/7eb6c1564dcd40d59d7dee79b4891e85/FLAGc04064e64 [2022-04-04 21:43:21,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd86c96/7eb6c1564dcd40d59d7dee79b4891e85 [2022-04-04 21:43:21,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 21:43:21,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 21:43:21,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 21:43:21,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 21:43:21,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 21:43:21,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a27c32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21, skipping insertion in model container [2022-04-04 21:43:21,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 21:43:21,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 21:43:21,492 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/fermat2-ll_unwindbound100.c[524,537] [2022-04-04 21:43:21,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 21:43:21,526 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 21:43:21,536 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/fermat2-ll_unwindbound100.c[524,537] [2022-04-04 21:43:21,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 21:43:21,555 INFO L208 MainTranslator]: Completed translation [2022-04-04 21:43:21,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21 WrapperNode [2022-04-04 21:43:21,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 21:43:21,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 21:43:21,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 21:43:21,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 21:43:21,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 21:43:21,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 21:43:21,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 21:43:21,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 21:43:21,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (1/1) ... [2022-04-04 21:43:21,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 21:43:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:21,613 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) [2022-04-04 21:43:21,614 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 [2022-04-04 21:43:21,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 21:43:21,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 21:43:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 21:43:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-04 21:43:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 21:43:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-04 21:43:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 21:43:21,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 21:43:21,685 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 21:43:21,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 21:43:21,774 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 21:43:21,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 21:43:21,786 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-04 21:43:21,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 09:43:21 BoogieIcfgContainer [2022-04-04 21:43:21,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 21:43:21,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 21:43:21,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 21:43:21,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 21:43:21,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 09:43:21" (1/3) ... [2022-04-04 21:43:21,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a0ecfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 09:43:21, skipping insertion in model container [2022-04-04 21:43:21,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 09:43:21" (2/3) ... [2022-04-04 21:43:21,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a0ecfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 09:43:21, skipping insertion in model container [2022-04-04 21:43:21,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 09:43:21" (3/3) ... [2022-04-04 21:43:21,803 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-04-04 21:43:21,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 21:43:21,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 21:43:21,839 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 21:43:21,850 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-04 21:43:21,850 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 21:43:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-04 21:43:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-04 21:43:21,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:21,869 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 21:43:21,869 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-04-04 21:43:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:21,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666174385] [2022-04-04 21:43:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:21,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:21,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61537946] [2022-04-04 21:43:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:21,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:21,936 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) [2022-04-04 21:43:21,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 21:43:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 21:43:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-04 21:43:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 21:43:22,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 21:43:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666174385] [2022-04-04 21:43:22,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:22,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61537946] [2022-04-04 21:43:22,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61537946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 21:43:22,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 21:43:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-04 21:43:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029048890] [2022-04-04 21:43:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 21:43:22,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-04 21:43:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-04 21:43:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-04 21:43:22,099 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-04 21:43:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:22,111 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-04-04 21:43:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-04 21:43:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 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 [2022-04-04 21:43:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:22,116 INFO L225 Difference]: With dead ends: 53 [2022-04-04 21:43:22,116 INFO L226 Difference]: Without dead ends: 25 [2022-04-04 21:43:22,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-04 21:43:22,120 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:22,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 21:43:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-04 21:43:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-04 21:43:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 21:43:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-04 21:43:22,141 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-04-04 21:43:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:22,142 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-04 21:43:22,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-04 21:43:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-04 21:43:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-04 21:43:22,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:22,143 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] [2022-04-04 21:43:22,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-04 21:43:22,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-04 21:43:22,352 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-04-04 21:43:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:22,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964628892] [2022-04-04 21:43:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:22,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313898928] [2022-04-04 21:43:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:22,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:22,365 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) [2022-04-04 21:43:22,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 21:43:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 21:43:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-04 21:43:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:22,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 21:43:22,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964628892] [2022-04-04 21:43:22,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313898928] [2022-04-04 21:43:22,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313898928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 21:43:22,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 21:43:22,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-04 21:43:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362283622] [2022-04-04 21:43:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 21:43:22,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-04 21:43:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-04 21:43:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 21:43:22,480 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-04 21:43:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:22,489 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-04 21:43:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-04 21:43:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-04 21:43:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:22,490 INFO L225 Difference]: With dead ends: 34 [2022-04-04 21:43:22,491 INFO L226 Difference]: Without dead ends: 27 [2022-04-04 21:43:22,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 21:43:22,492 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:22,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 21:43:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-04 21:43:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-04 21:43:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 21:43:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-04 21:43:22,496 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-04-04 21:43:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:22,497 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-04 21:43:22,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-04 21:43:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-04 21:43:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-04 21:43:22,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:22,498 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] [2022-04-04 21:43:22,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:22,718 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,SelfDestructingSolverStorable1 [2022-04-04 21:43:22,718 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-04-04 21:43:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042396351] [2022-04-04 21:43:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:22,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:22,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469714943] [2022-04-04 21:43:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:22,742 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) [2022-04-04 21:43:22,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 21:43:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 21:43:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-04 21:43:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:23,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 21:43:23,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:23,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042396351] [2022-04-04 21:43:23,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469714943] [2022-04-04 21:43:23,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469714943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 21:43:23,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 21:43:23,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-04 21:43:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837665348] [2022-04-04 21:43:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 21:43:23,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-04 21:43:23,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-04 21:43:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-04 21:43:23,048 INFO L87 Difference]: Start difference. First operand 27 states and 31 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) [2022-04-04 21:43:25,876 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 [] [2022-04-04 21:43:27,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-04 21:43:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:27,021 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-04-04 21:43:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-04 21:43:27,022 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 [2022-04-04 21:43:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:27,023 INFO L225 Difference]: With dead ends: 39 [2022-04-04 21:43:27,023 INFO L226 Difference]: Without dead ends: 37 [2022-04-04 21:43:27,023 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 [2022-04-04 21:43:27,024 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:27,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-04-04 21:43:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-04 21:43:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-04 21:43:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-04 21:43:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-04-04 21:43:27,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-04-04 21:43:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:27,030 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-04-04 21:43:27,030 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) [2022-04-04 21:43:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-04 21:43:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-04 21:43:27,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:27,031 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, 1] [2022-04-04 21:43:27,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-04 21:43:27,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:27,248 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-04-04 21:43:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:27,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243153401] [2022-04-04 21:43:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:27,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275868870] [2022-04-04 21:43:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:27,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:27,259 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) [2022-04-04 21:43:27,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-04 21:43:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 21:43:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-04 21:43:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:27,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243153401] [2022-04-04 21:43:27,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275868870] [2022-04-04 21:43:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275868870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:27,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:27,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-04 21:43:27,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906962717] [2022-04-04 21:43:27,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:27,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-04 21:43:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-04 21:43:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-04 21:43:27,548 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-04 21:43:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:27,711 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-04-04 21:43:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-04 21:43:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-04-04 21:43:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:27,712 INFO L225 Difference]: With dead ends: 43 [2022-04-04 21:43:27,712 INFO L226 Difference]: Without dead ends: 38 [2022-04-04 21:43:27,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-04 21:43:27,713 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:27,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 120 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 21:43:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-04 21:43:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-04-04 21:43:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 21:43:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-04 21:43:27,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-04-04 21:43:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:27,718 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-04 21:43:27,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-04 21:43:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-04 21:43:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-04 21:43:27,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:27,719 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-04-04 21:43:27,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:27,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:27,931 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-04-04 21:43:27,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:27,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752873379] [2022-04-04 21:43:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:27,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:27,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:27,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15110599] [2022-04-04 21:43:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:27,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:27,940 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) [2022-04-04 21:43:27,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-04 21:43:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 21:43:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-04 21:43:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:28,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752873379] [2022-04-04 21:43:28,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15110599] [2022-04-04 21:43:28,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15110599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:28,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:28,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-04 21:43:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493037932] [2022-04-04 21:43:28,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:28,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-04 21:43:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-04 21:43:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-04 21:43:28,106 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-04 21:43:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:28,152 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-04-04 21:43:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-04 21:43:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-04-04 21:43:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:28,153 INFO L225 Difference]: With dead ends: 61 [2022-04-04 21:43:28,153 INFO L226 Difference]: Without dead ends: 56 [2022-04-04 21:43:28,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-04 21:43:28,154 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:28,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 21:43:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-04 21:43:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-04 21:43:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-04 21:43:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-04-04 21:43:28,161 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-04-04 21:43:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:28,161 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-04-04 21:43:28,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-04 21:43:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-04-04 21:43:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-04 21:43:28,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:28,162 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-04-04 21:43:28,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:28,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:28,376 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 2 times [2022-04-04 21:43:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:28,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245775783] [2022-04-04 21:43:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:28,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:28,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441541928] [2022-04-04 21:43:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 21:43:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:28,399 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) [2022-04-04 21:43:28,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-04 21:43:28,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 21:43:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 21:43:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-04 21:43:28,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:28,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-04 21:43:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245775783] [2022-04-04 21:43:28,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441541928] [2022-04-04 21:43:28,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441541928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:28,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:28,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-04 21:43:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978453436] [2022-04-04 21:43:28,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:28,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-04 21:43:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-04 21:43:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-04 21:43:28,702 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-04 21:43:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:28,845 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-04-04 21:43:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-04 21:43:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-04-04 21:43:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:28,847 INFO L225 Difference]: With dead ends: 115 [2022-04-04 21:43:28,847 INFO L226 Difference]: Without dead ends: 110 [2022-04-04 21:43:28,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-04 21:43:28,848 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 143 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:28,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 142 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 21:43:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-04 21:43:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-04 21:43:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-04 21:43:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-04-04 21:43:28,877 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-04-04 21:43:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:28,877 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-04-04 21:43:28,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-04 21:43:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-04-04 21:43:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-04 21:43:28,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:28,879 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 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] [2022-04-04 21:43:28,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:29,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:29,098 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 3 times [2022-04-04 21:43:29,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383152547] [2022-04-04 21:43:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:29,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:29,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:29,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316636173] [2022-04-04 21:43:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 21:43:29,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:29,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:29,108 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) [2022-04-04 21:43:29,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-04 21:43:31,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-04 21:43:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 21:43:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-04 21:43:31,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:31,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-04 21:43:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383152547] [2022-04-04 21:43:31,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316636173] [2022-04-04 21:43:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316636173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:31,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-04 21:43:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860829945] [2022-04-04 21:43:31,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:31,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-04 21:43:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-04 21:43:31,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-04 21:43:31,767 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-04-04 21:43:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:32,177 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-04-04 21:43:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-04 21:43:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-04-04 21:43:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:32,182 INFO L225 Difference]: With dead ends: 223 [2022-04-04 21:43:32,182 INFO L226 Difference]: Without dead ends: 218 [2022-04-04 21:43:32,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-04-04 21:43:32,184 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 260 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:32,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 302 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-04 21:43:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-04 21:43:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-04-04 21:43:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-04 21:43:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-04-04 21:43:32,211 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-04-04 21:43:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:32,212 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-04-04 21:43:32,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-04-04 21:43:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-04-04 21:43:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-04 21:43:32,214 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:32,214 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 21:43:32,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:32,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:32,414 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 4 times [2022-04-04 21:43:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232710076] [2022-04-04 21:43:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:32,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:32,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482367362] [2022-04-04 21:43:32,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-04 21:43:32,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:32,431 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) [2022-04-04 21:43:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-04 21:43:32,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-04 21:43:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 21:43:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-04 21:43:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-04-04 21:43:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232710076] [2022-04-04 21:43:34,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482367362] [2022-04-04 21:43:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482367362] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:34,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-04 21:43:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863893310] [2022-04-04 21:43:34,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:34,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-04 21:43:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-04 21:43:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-04 21:43:34,034 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-04-04 21:43:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:35,195 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-04-04 21:43:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-04 21:43:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-04-04 21:43:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:35,197 INFO L225 Difference]: With dead ends: 439 [2022-04-04 21:43:35,197 INFO L226 Difference]: Without dead ends: 434 [2022-04-04 21:43:35,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-04-04 21:43:35,203 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 877 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:35,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 506 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-04 21:43:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-04-04 21:43:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-04-04 21:43:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-04 21:43:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-04-04 21:43:35,234 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-04-04 21:43:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:35,235 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-04-04 21:43:35,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-04-04 21:43:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-04-04 21:43:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-04-04 21:43:35,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:35,247 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 21:43:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:35,463 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,SelfDestructingSolverStorable7 [2022-04-04 21:43:35,464 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 5 times [2022-04-04 21:43:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599607875] [2022-04-04 21:43:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:35,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:35,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611100262] [2022-04-04 21:43:35,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-04 21:43:35,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:35,479 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) [2022-04-04 21:43:35,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-04 21:43:37,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-04-04 21:43:37,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 21:43:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-04 21:43:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 21:43:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 21:43:38,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 21:43:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-04-04 21:43:41,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 21:43:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599607875] [2022-04-04 21:43:41,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 21:43:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611100262] [2022-04-04 21:43:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611100262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 21:43:41,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 21:43:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-04-04 21:43:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859620588] [2022-04-04 21:43:41,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 21:43:41,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-04 21:43:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 21:43:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-04 21:43:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-04-04 21:43:41,358 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-04-04 21:43:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 21:43:45,162 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-04-04 21:43:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-04-04 21:43:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-04-04 21:43:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 21:43:45,165 INFO L225 Difference]: With dead ends: 871 [2022-04-04 21:43:45,166 INFO L226 Difference]: Without dead ends: 866 [2022-04-04 21:43:45,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-04-04 21:43:45,172 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 2148 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-04 21:43:45,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 826 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-04 21:43:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-04-04 21:43:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-04-04 21:43:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-04 21:43:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-04-04 21:43:45,232 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-04-04 21:43:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 21:43:45,232 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-04-04 21:43:45,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-04-04 21:43:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-04-04 21:43:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-04-04 21:43:45,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 21:43:45,244 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 21:43:45,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-04 21:43:45,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:45,452 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 21:43:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 21:43:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 6 times [2022-04-04 21:43:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 21:43:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543481849] [2022-04-04 21:43:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 21:43:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 21:43:45,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 21:43:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206211995] [2022-04-04 21:43:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-04 21:43:45,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 21:43:45,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 21:43:45,484 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) [2022-04-04 21:43:45,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process