/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:41:49,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:41:49,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:41:49,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:41:49,208 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 [2022-03-20 00:41:49,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:41:49,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:41:49,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:41:49,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:41:49,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:41:49,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:41:49,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:41:49,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:41:49,239 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:41:49,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:41:49,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:41:49,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:41:49,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:41:49,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:41:49,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:41:49,242 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:41:49,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:41:49,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:41:49,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:41:49,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:41:49,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:41:49,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:41:49,428 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:41:49,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-20 00:41:49,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2fa70b/42580c1e55964f3db9f21417a23c7639/FLAGce72ece6a [2022-03-20 00:41:49,767 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:41:49,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-20 00:41:49,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2fa70b/42580c1e55964f3db9f21417a23c7639/FLAGce72ece6a [2022-03-20 00:41:50,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee2fa70b/42580c1e55964f3db9f21417a23c7639 [2022-03-20 00:41:50,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:41:50,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:41:50,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:41:50,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:41:50,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:41:50,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50, skipping insertion in model container [2022-03-20 00:41:50,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:41:50,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:41:50,364 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/egcd3-ll_unwindbound50.c[490,503] [2022-03-20 00:41:50,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:41:50,403 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:41:50,412 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/egcd3-ll_unwindbound50.c[490,503] [2022-03-20 00:41:50,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:41:50,440 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:41:50,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50 WrapperNode [2022-03-20 00:41:50,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:41:50,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:41:50,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:41:50,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:41:50,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:41:50,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:41:50,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:41:50,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:41:50,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (1/1) ... [2022-03-20 00:41:50,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:41:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:50,497 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) [2022-03-20 00:41:50,513 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 [2022-03-20 00:41:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:41:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:41:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:41:50,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:41:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:41:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:41:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:41:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:41:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:41:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:41:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:41:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:41:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:41:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:41:50,618 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:41:50,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:41:50,776 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:41:50,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:41:50,799 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 00:41:50,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:41:50 BoogieIcfgContainer [2022-03-20 00:41:50,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:41:50,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:41:50,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:41:50,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:41:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:41:50" (1/3) ... [2022-03-20 00:41:50,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ddaa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:41:50, skipping insertion in model container [2022-03-20 00:41:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:41:50" (2/3) ... [2022-03-20 00:41:50,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ddaa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:41:50, skipping insertion in model container [2022-03-20 00:41:50,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:41:50" (3/3) ... [2022-03-20 00:41:50,806 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2022-03-20 00:41:50,810 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:41:50,810 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:41:50,838 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:41:50,843 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 [2022-03-20 00:41:50,843 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:41:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:41:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 00:41:50,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:50,857 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:50,857 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-20 00:41:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:50,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170474292] [2022-03-20 00:41:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:50,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:41:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:41:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 00:41:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170474292] [2022-03-20 00:41:51,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170474292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:51,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:51,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:41:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31192028] [2022-03-20 00:41:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:51,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:41:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:41:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:41:51,104 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:41:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:51,209 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-20 00:41:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:41:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 00:41:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:51,218 INFO L225 Difference]: With dead ends: 74 [2022-03-20 00:41:51,218 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 00:41:51,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:41:51,223 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:51,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 00:41:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 00:41:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:41:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 00:41:51,266 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 00:41:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:51,266 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 00:41:51,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:41:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 00:41:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 00:41:51,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:51,268 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] [2022-03-20 00:41:51,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:41:51,268 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-20 00:41:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761036955] [2022-03-20 00:41:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:51,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235165609] [2022-03-20 00:41:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:51,285 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) [2022-03-20 00:41:51,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:41:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:41:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:51,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761036955] [2022-03-20 00:41:51,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235165609] [2022-03-20 00:41:51,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235165609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:51,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:51,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 00:41:51,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804547617] [2022-03-20 00:41:51,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:51,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 00:41:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 00:41:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 00:41:51,410 INFO L87 Difference]: Start difference. First operand 35 states and 45 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) [2022-03-20 00:41:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:51,422 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-20 00:41:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 00:41:51,422 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 [2022-03-20 00:41:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:51,423 INFO L225 Difference]: With dead ends: 44 [2022-03-20 00:41:51,423 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 00:41:51,424 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 [2022-03-20 00:41:51,424 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:51,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 00:41:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 00:41:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:41:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 00:41:51,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 00:41:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:51,431 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 00:41:51,431 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) [2022-03-20 00:41:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 00:41:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 00:41:51,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:51,432 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, 1] [2022-03-20 00:41:51,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 00:41:51,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:51,666 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-20 00:41:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:51,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455295508] [2022-03-20 00:41:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:51,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790310066] [2022-03-20 00:41:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:51,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:51,693 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) [2022-03-20 00:41:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:41:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:51,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:41:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:51,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455295508] [2022-03-20 00:41:51,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790310066] [2022-03-20 00:41:51,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790310066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:51,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:51,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:41:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658598306] [2022-03-20 00:41:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:51,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:41:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:41:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:41:51,853 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:41:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:51,941 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-20 00:41:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:41:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 00:41:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:51,942 INFO L225 Difference]: With dead ends: 57 [2022-03-20 00:41:51,942 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 00:41:51,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:41:51,944 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:51,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 00:41:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-20 00:41:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:41:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-20 00:41:51,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-20 00:41:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:51,950 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-20 00:41:51,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:41:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-20 00:41:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:41:51,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:51,951 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] [2022-03-20 00:41:51,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 00:41:52,167 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,SelfDestructingSolverStorable2 [2022-03-20 00:41:52,168 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-20 00:41:52,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466325307] [2022-03-20 00:41:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:52,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:52,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:52,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168928388] [2022-03-20 00:41:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:52,204 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) [2022-03-20 00:41:52,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:41:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:41:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:52,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466325307] [2022-03-20 00:41:52,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168928388] [2022-03-20 00:41:52,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168928388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:52,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:52,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:41:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035030555] [2022-03-20 00:41:52,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:52,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:41:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:41:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:41:52,342 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 00:41:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:52,372 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-20 00:41:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:41:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2022-03-20 00:41:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:52,374 INFO L225 Difference]: With dead ends: 62 [2022-03-20 00:41:52,374 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 00:41:52,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:41:52,375 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:52,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 00:41:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 00:41:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 00:41:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-03-20 00:41:52,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-03-20 00:41:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:52,382 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-03-20 00:41:52,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 00:41:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-03-20 00:41:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:41:52,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:52,383 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, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:52,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:52,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:52,594 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2022-03-20 00:41:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:52,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015274916] [2022-03-20 00:41:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:52,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:52,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:52,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372200505] [2022-03-20 00:41:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:52,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:52,617 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) [2022-03-20 00:41:52,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:41:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 00:41:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:52,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:52,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015274916] [2022-03-20 00:41:52,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372200505] [2022-03-20 00:41:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372200505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:52,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:52,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 00:41:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037610508] [2022-03-20 00:41:52,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:52,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:41:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:41:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:41:52,880 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:41:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:53,037 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-03-20 00:41:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:41:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-20 00:41:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:53,038 INFO L225 Difference]: With dead ends: 68 [2022-03-20 00:41:53,038 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 00:41:53,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:41:53,039 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:53,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 00:41:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-03-20 00:41:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 00:41:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-20 00:41:53,048 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-20 00:41:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:53,048 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-20 00:41:53,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:41:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-20 00:41:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 00:41:53,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:53,049 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, 1] [2022-03-20 00:41:53,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:53,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:53,266 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-20 00:41:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:53,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554652384] [2022-03-20 00:41:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:53,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659359023] [2022-03-20 00:41:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:53,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:53,288 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) [2022-03-20 00:41:53,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:41:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:53,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:41:53,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:53,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554652384] [2022-03-20 00:41:53,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659359023] [2022-03-20 00:41:53,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659359023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:53,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:53,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 00:41:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085337189] [2022-03-20 00:41:53,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:53,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:41:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:53,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:41:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:41:53,488 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:53,686 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2022-03-20 00:41:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 00:41:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-03-20 00:41:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:53,688 INFO L225 Difference]: With dead ends: 151 [2022-03-20 00:41:53,688 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 00:41:53,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-20 00:41:53,689 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:53,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:41:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 00:41:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-03-20 00:41:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 00:41:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-03-20 00:41:53,710 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-03-20 00:41:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:53,710 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-03-20 00:41:53,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-03-20 00:41:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 00:41:53,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:53,726 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] [2022-03-20 00:41:53,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:53,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:53,927 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-20 00:41:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899643413] [2022-03-20 00:41:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:53,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762758348] [2022-03-20 00:41:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:53,953 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) [2022-03-20 00:41:54,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:41:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:41:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:54,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899643413] [2022-03-20 00:41:54,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762758348] [2022-03-20 00:41:54,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762758348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:54,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:54,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 00:41:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052468577] [2022-03-20 00:41:54,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:54,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:41:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:41:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:41:54,234 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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) [2022-03-20 00:41:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:54,379 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2022-03-20 00:41:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:41:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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 31 [2022-03-20 00:41:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:54,382 INFO L225 Difference]: With dead ends: 187 [2022-03-20 00:41:54,382 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 00:41:54,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:41:54,384 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:54,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 00:41:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-03-20 00:41:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 00:41:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-03-20 00:41:54,425 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-03-20 00:41:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:54,425 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-03-20 00:41:54,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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) [2022-03-20 00:41:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-03-20 00:41:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 00:41:54,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:54,428 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, 1, 1, 1, 1, 1] [2022-03-20 00:41:54,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:54,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:54,656 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2022-03-20 00:41:54,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:54,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599489140] [2022-03-20 00:41:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:54,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:54,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:54,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155954248] [2022-03-20 00:41:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:54,677 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) [2022-03-20 00:41:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:41:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 00:41:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:54,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599489140] [2022-03-20 00:41:54,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155954248] [2022-03-20 00:41:54,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155954248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:54,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:54,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 00:41:54,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489180531] [2022-03-20 00:41:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:54,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:41:54,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:41:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:41:54,874 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:41:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:55,040 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-03-20 00:41:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:41:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-20 00:41:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:55,042 INFO L225 Difference]: With dead ends: 157 [2022-03-20 00:41:55,042 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 00:41:55,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:41:55,042 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:55,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 269 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 00:41:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-03-20 00:41:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 00:41:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-03-20 00:41:55,053 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-03-20 00:41:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:55,054 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-03-20 00:41:55,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:41:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-03-20 00:41:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 00:41:55,054 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:55,054 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:55,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:55,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:55,274 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:55,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:55,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-20 00:41:55,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:55,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390369061] [2022-03-20 00:41:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:55,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:55,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:55,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672320358] [2022-03-20 00:41:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:55,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:55,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:55,284 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) [2022-03-20 00:41:55,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:41:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 00:41:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 00:41:55,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:55,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390369061] [2022-03-20 00:41:55,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672320358] [2022-03-20 00:41:55,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672320358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:55,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:55,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 00:41:55,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327233893] [2022-03-20 00:41:55,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:55,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:41:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:41:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:41:55,576 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:41:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:55,709 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-03-20 00:41:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:41:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 00:41:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:55,710 INFO L225 Difference]: With dead ends: 179 [2022-03-20 00:41:55,710 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 00:41:55,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:41:55,711 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:55,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 409 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 00:41:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-20 00:41:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 00:41:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-03-20 00:41:55,722 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-03-20 00:41:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:55,722 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-03-20 00:41:55,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:41:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-03-20 00:41:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 00:41:55,723 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:55,723 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:55,937 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,SelfDestructingSolverStorable8 [2022-03-20 00:41:55,937 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -892181054, now seen corresponding path program 1 times [2022-03-20 00:41:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76638689] [2022-03-20 00:41:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:55,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:55,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817333249] [2022-03-20 00:41:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:55,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:55,949 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) [2022-03-20 00:41:55,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 00:41:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:41:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:56,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76638689] [2022-03-20 00:41:56,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817333249] [2022-03-20 00:41:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817333249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:56,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:56,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:41:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61654005] [2022-03-20 00:41:56,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:56,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:41:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:41:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:41:56,048 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-20 00:41:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:56,080 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2022-03-20 00:41:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:41:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 36 [2022-03-20 00:41:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:56,082 INFO L225 Difference]: With dead ends: 241 [2022-03-20 00:41:56,082 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 00:41:56,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:41:56,085 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:56,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 00:41:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 00:41:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 00:41:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-03-20 00:41:56,099 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-03-20 00:41:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:56,100 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-03-20 00:41:56,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-20 00:41:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-03-20 00:41:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 00:41:56,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:56,101 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:56,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 00:41:56,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 00:41:56,315 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-20 00:41:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979343977] [2022-03-20 00:41:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:56,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549586727] [2022-03-20 00:41:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:56,344 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) [2022-03-20 00:41:56,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 00:41:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:41:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 00:41:56,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979343977] [2022-03-20 00:41:56,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549586727] [2022-03-20 00:41:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549586727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:56,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:41:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024884858] [2022-03-20 00:41:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:56,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:41:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:41:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:41:56,444 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:41:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:56,490 INFO L93 Difference]: Finished difference Result 239 states and 335 transitions. [2022-03-20 00:41:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:41:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 00:41:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:56,497 INFO L225 Difference]: With dead ends: 239 [2022-03-20 00:41:56,497 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 00:41:56,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:41:56,497 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:56,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 00:41:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-03-20 00:41:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 00:41:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-03-20 00:41:56,515 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-03-20 00:41:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:56,516 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-03-20 00:41:56,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:41:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-03-20 00:41:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 00:41:56,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:56,517 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:56,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 00:41:56,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 00:41:56,744 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-20 00:41:56,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707927423] [2022-03-20 00:41:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:56,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:56,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637602936] [2022-03-20 00:41:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:56,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:56,763 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:56,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 00:41:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 00:41:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:56,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707927423] [2022-03-20 00:41:57,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637602936] [2022-03-20 00:41:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637602936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:57,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:57,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 00:41:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968587162] [2022-03-20 00:41:57,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:57,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:41:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:41:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:41:57,156 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 00:41:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:57,648 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-03-20 00:41:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:41:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-20 00:41:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:57,651 INFO L225 Difference]: With dead ends: 392 [2022-03-20 00:41:57,651 INFO L226 Difference]: Without dead ends: 390 [2022-03-20 00:41:57,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:41:57,652 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 170 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:57,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 370 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 00:41:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-20 00:41:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-03-20 00:41:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 00:41:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-03-20 00:41:57,688 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-03-20 00:41:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:57,688 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-03-20 00:41:57,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 00:41:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-03-20 00:41:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 00:41:57,689 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:57,689 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:57,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:57,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 00:41:57,903 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-20 00:41:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:57,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034221164] [2022-03-20 00:41:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:57,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:57,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620449859] [2022-03-20 00:41:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:57,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:57,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:57,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 00:41:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:41:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 00:41:58,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:41:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:58,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034221164] [2022-03-20 00:41:58,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:58,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620449859] [2022-03-20 00:41:58,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620449859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:41:58,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:41:58,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:41:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189465662] [2022-03-20 00:41:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:41:58,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:41:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:41:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:41:58,038 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:41:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:58,099 INFO L93 Difference]: Finished difference Result 566 states and 887 transitions. [2022-03-20 00:41:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:41:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-20 00:41:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:58,101 INFO L225 Difference]: With dead ends: 566 [2022-03-20 00:41:58,101 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 00:41:58,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:41:58,102 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:58,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:41:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 00:41:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-03-20 00:41:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-20 00:41:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-03-20 00:41:58,165 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-03-20 00:41:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:58,166 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-03-20 00:41:58,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:41:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-03-20 00:41:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 00:41:58,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:58,166 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:58,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:58,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 00:41:58,383 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1018638220, now seen corresponding path program 1 times [2022-03-20 00:41:58,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:58,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771041261] [2022-03-20 00:41:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:58,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:58,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074833135] [2022-03-20 00:41:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:58,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:58,393 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:58,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 00:41:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 00:41:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 00:41:58,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 00:41:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771041261] [2022-03-20 00:41:58,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074833135] [2022-03-20 00:41:58,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074833135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:58,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:58,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 00:41:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390817101] [2022-03-20 00:41:58,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:58,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 00:41:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 00:41:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:41:58,619 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:58,823 INFO L93 Difference]: Finished difference Result 1127 states and 1721 transitions. [2022-03-20 00:41:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 00:41:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 00:41:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:58,827 INFO L225 Difference]: With dead ends: 1127 [2022-03-20 00:41:58,827 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 00:41:58,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-20 00:41:58,829 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:58,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 342 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 00:41:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-03-20 00:41:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-03-20 00:41:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-03-20 00:41:58,901 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-03-20 00:41:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:58,901 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-03-20 00:41:58,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-03-20 00:41:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 00:41:58,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:58,902 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:58,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:59,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 00:41:59,118 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2064241646, now seen corresponding path program 1 times [2022-03-20 00:41:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395659487] [2022-03-20 00:41:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:59,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:59,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296980168] [2022-03-20 00:41:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:59,131 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:59,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 00:41:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:41:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 00:41:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:59,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 00:41:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395659487] [2022-03-20 00:41:59,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296980168] [2022-03-20 00:41:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296980168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:59,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 00:41:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985207934] [2022-03-20 00:41:59,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:59,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 00:41:59,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 00:41:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:41:59,360 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:59,632 INFO L93 Difference]: Finished difference Result 1597 states and 2379 transitions. [2022-03-20 00:41:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 00:41:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-03-20 00:41:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:59,637 INFO L225 Difference]: With dead ends: 1597 [2022-03-20 00:41:59,637 INFO L226 Difference]: Without dead ends: 1119 [2022-03-20 00:41:59,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-20 00:41:59,654 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 255 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:59,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 319 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:41:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-20 00:41:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-03-20 00:41:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-03-20 00:41:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-03-20 00:41:59,760 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-03-20 00:41:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:59,761 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-03-20 00:41:59,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 00:41:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-03-20 00:41:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 00:41:59,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:59,761 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:59,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 00:41:59,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:59,989 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1262965884, now seen corresponding path program 2 times [2022-03-20 00:41:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:59,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267573018] [2022-03-20 00:41:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:59,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422219302] [2022-03-20 00:41:59,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:41:59,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:59,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:59,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 00:42:00,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:42:00,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:42:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:42:00,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 00:42:00,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:00,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267573018] [2022-03-20 00:42:00,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422219302] [2022-03-20 00:42:00,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422219302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:00,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:00,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620730753] [2022-03-20 00:42:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:00,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:00,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:00,117 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-03-20 00:42:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:00,346 INFO L93 Difference]: Finished difference Result 1700 states and 2539 transitions. [2022-03-20 00:42:00,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:42:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 44 [2022-03-20 00:42:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:00,352 INFO L225 Difference]: With dead ends: 1700 [2022-03-20 00:42:00,353 INFO L226 Difference]: Without dead ends: 1234 [2022-03-20 00:42:00,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:42:00,355 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:00,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:42:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-20 00:42:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-03-20 00:42:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-03-20 00:42:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-03-20 00:42:00,473 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-03-20 00:42:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:00,473 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-03-20 00:42:00,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-03-20 00:42:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-03-20 00:42:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 00:42:00,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:00,474 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:00,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:00,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 00:42:00,687 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-20 00:42:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311509080] [2022-03-20 00:42:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:00,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:00,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73791946] [2022-03-20 00:42:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:00,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:00,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:00,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 00:42:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 00:42:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 00:42:01,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 00:42:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311509080] [2022-03-20 00:42:01,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73791946] [2022-03-20 00:42:01,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73791946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:01,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:01,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 00:42:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591909689] [2022-03-20 00:42:01,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:01,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 00:42:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 00:42:01,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 00:42:01,933 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 00:42:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:07,321 INFO L93 Difference]: Finished difference Result 1412 states and 2014 transitions. [2022-03-20 00:42:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 00:42:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-20 00:42:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:07,334 INFO L225 Difference]: With dead ends: 1412 [2022-03-20 00:42:07,334 INFO L226 Difference]: Without dead ends: 1404 [2022-03-20 00:42:07,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 00:42:07,336 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 186 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:07,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 676 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 00:42:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-20 00:42:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-03-20 00:42:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-20 00:42:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-03-20 00:42:07,507 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-03-20 00:42:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:07,507 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-03-20 00:42:07,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 00:42:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-03-20 00:42:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 00:42:07,508 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:07,508 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:07,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:07,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 00:42:07,723 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2022-03-20 00:42:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565703202] [2022-03-20 00:42:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:07,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:07,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950660543] [2022-03-20 00:42:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:07,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:07,743 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 00:42:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:07,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 00:42:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 00:42:07,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 00:42:08,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565703202] [2022-03-20 00:42:08,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950660543] [2022-03-20 00:42:08,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950660543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:08,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:08,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 00:42:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559855949] [2022-03-20 00:42:08,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:08,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 00:42:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 00:42:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:42:08,106 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 00:42:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:08,796 INFO L93 Difference]: Finished difference Result 2565 states and 3679 transitions. [2022-03-20 00:42:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 00:42:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-03-20 00:42:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:08,806 INFO L225 Difference]: With dead ends: 2565 [2022-03-20 00:42:08,806 INFO L226 Difference]: Without dead ends: 2543 [2022-03-20 00:42:08,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-20 00:42:08,808 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:08,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 488 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:42:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-03-20 00:42:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-03-20 00:42:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-20 00:42:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-03-20 00:42:09,301 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-03-20 00:42:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:09,302 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-03-20 00:42:09,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 00:42:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-03-20 00:42:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 00:42:09,302 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:09,302 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:09,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:09,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 00:42:09,520 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-20 00:42:09,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:09,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561575711] [2022-03-20 00:42:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:09,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:09,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730198095] [2022-03-20 00:42:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:09,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:09,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:09,543 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 00:42:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 00:42:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 00:42:09,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 00:42:09,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:09,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561575711] [2022-03-20 00:42:09,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:09,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730198095] [2022-03-20 00:42:09,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730198095] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:42:09,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:42:09,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 00:42:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353840279] [2022-03-20 00:42:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:09,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:09,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:42:09,954 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:42:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:10,289 INFO L93 Difference]: Finished difference Result 2467 states and 3485 transitions. [2022-03-20 00:42:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:42:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 00:42:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:10,303 INFO L225 Difference]: With dead ends: 2467 [2022-03-20 00:42:10,303 INFO L226 Difference]: Without dead ends: 2465 [2022-03-20 00:42:10,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:42:10,305 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:10,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-03-20 00:42:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-03-20 00:42:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-20 00:42:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-03-20 00:42:10,679 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-03-20 00:42:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:10,679 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-03-20 00:42:10,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:42:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-03-20 00:42:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 00:42:10,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:10,680 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:10,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:10,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:10,896 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash -958869778, now seen corresponding path program 1 times [2022-03-20 00:42:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:10,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63594572] [2022-03-20 00:42:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:10,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:10,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:10,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745922844] [2022-03-20 00:42:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:10,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:10,905 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:10,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 00:42:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 00:42:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 00:42:11,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:42:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63594572] [2022-03-20 00:42:11,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745922844] [2022-03-20 00:42:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745922844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:42:11,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:42:11,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:42:11,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939622126] [2022-03-20 00:42:11,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:42:11,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:42:11,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:42:11,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:42:11,068 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 00:42:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:11,403 INFO L93 Difference]: Finished difference Result 4377 states and 6175 transitions. [2022-03-20 00:42:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:42:11,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-03-20 00:42:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:11,410 INFO L225 Difference]: With dead ends: 4377 [2022-03-20 00:42:11,410 INFO L226 Difference]: Without dead ends: 2578 [2022-03-20 00:42:11,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:42:11,414 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:11,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:42:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-20 00:42:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-03-20 00:42:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-20 00:42:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-03-20 00:42:11,689 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-03-20 00:42:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:11,689 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-03-20 00:42:11,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 00:42:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-03-20 00:42:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 00:42:11,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:11,690 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:11,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:11,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:11,897 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 2 times [2022-03-20 00:42:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714772387] [2022-03-20 00:42:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:11,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102313416] [2022-03-20 00:42:11,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:42:11,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:11,919 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:11,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 00:42:12,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:42:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:42:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 00:42:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 00:42:13,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 00:42:14,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:14,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714772387] [2022-03-20 00:42:14,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:14,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102313416] [2022-03-20 00:42:14,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102313416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:14,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:14,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-20 00:42:14,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069474989] [2022-03-20 00:42:14,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:14,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 00:42:14,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:14,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 00:42:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:42:14,466 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 00:42:23,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:42:30,838 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 [] [2022-03-20 00:42:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:42:32,725 INFO L93 Difference]: Finished difference Result 2869 states and 3894 transitions. [2022-03-20 00:42:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 00:42:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-03-20 00:42:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:42:32,734 INFO L225 Difference]: With dead ends: 2869 [2022-03-20 00:42:32,734 INFO L226 Difference]: Without dead ends: 2863 [2022-03-20 00:42:32,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 00:42:32,736 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 297 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 303 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:42:32,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 848 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1023 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2022-03-20 00:42:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-20 00:42:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-03-20 00:42:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-03-20 00:42:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-03-20 00:42:33,121 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-03-20 00:42:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:42:33,121 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-03-20 00:42:33,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 00:42:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-03-20 00:42:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 00:42:33,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:42:33,123 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:42:33,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 00:42:33,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 00:42:33,339 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:42:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:42:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 1 times [2022-03-20 00:42:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:42:33,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547696352] [2022-03-20 00:42:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:33,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:42:33,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:42:33,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19611787] [2022-03-20 00:42:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:42:33,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:42:33,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:42:33,348 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:42:33,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 00:42:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:42:33,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 00:42:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:42:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 00:42:34,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:42:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 00:42:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:42:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547696352] [2022-03-20 00:42:39,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:42:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19611787] [2022-03-20 00:42:39,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19611787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:42:39,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:42:39,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 00:42:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815382741] [2022-03-20 00:42:39,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:42:39,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 00:42:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:42:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 00:42:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-20 00:42:39,036 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 00:42:51,746 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 [] [2022-03-20 00:42:57,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:08,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:11,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:18,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:21,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:26,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:29,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:35,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:37,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:40,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:42,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:46,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:48,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:43:59,185 INFO L93 Difference]: Finished difference Result 3417 states and 4650 transitions. [2022-03-20 00:43:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 00:43:59,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-03-20 00:43:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:43:59,199 INFO L225 Difference]: With dead ends: 3417 [2022-03-20 00:43:59,199 INFO L226 Difference]: Without dead ends: 3386 [2022-03-20 00:43:59,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3583 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=1736, Invalid=9184, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 00:43:59,203 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 414 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 522 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:43:59,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 1235 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 1540 Invalid, 11 Unknown, 0 Unchecked, 36.6s Time] [2022-03-20 00:43:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-03-20 00:43:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3094. [2022-03-20 00:43:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2229 states have (on average 1.2960969044414536) internal successors, (2889), 2276 states have internal predecessors, (2889), 689 states have call successors, (689), 177 states have call predecessors, (689), 175 states have return successors, (682), 640 states have call predecessors, (682), 682 states have call successors, (682) [2022-03-20 00:43:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4260 transitions. [2022-03-20 00:43:59,971 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4260 transitions. Word has length 88 [2022-03-20 00:43:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:43:59,972 INFO L478 AbstractCegarLoop]: Abstraction has 3094 states and 4260 transitions. [2022-03-20 00:43:59,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 00:43:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4260 transitions. [2022-03-20 00:43:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 00:43:59,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:43:59,973 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:43:59,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:00,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 00:44:00,191 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 516983514, now seen corresponding path program 3 times [2022-03-20 00:44:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195325688] [2022-03-20 00:44:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:00,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601798222] [2022-03-20 00:44:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:44:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:00,201 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:00,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 00:44:00,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 00:44:00,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 00:44:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 00:44:00,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 00:44:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195325688] [2022-03-20 00:44:01,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601798222] [2022-03-20 00:44:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601798222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:01,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:01,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 00:44:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016194887] [2022-03-20 00:44:01,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:01,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:44:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:01,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:44:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:44:01,052 INFO L87 Difference]: Start difference. First operand 3094 states and 4260 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 00:44:03,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:06,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:09,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:10,334 INFO L93 Difference]: Finished difference Result 3285 states and 4528 transitions. [2022-03-20 00:44:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 00:44:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-03-20 00:44:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:10,344 INFO L225 Difference]: With dead ends: 3285 [2022-03-20 00:44:10,345 INFO L226 Difference]: Without dead ends: 3273 [2022-03-20 00:44:10,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-03-20 00:44:10,347 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:10,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 653 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 468 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-03-20 00:44:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-03-20 00:44:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3021. [2022-03-20 00:44:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2161 states have (on average 1.2952336881073576) internal successors, (2799), 2203 states have internal predecessors, (2799), 684 states have call successors, (684), 177 states have call predecessors, (684), 175 states have return successors, (682), 640 states have call predecessors, (682), 682 states have call successors, (682) [2022-03-20 00:44:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4165 transitions. [2022-03-20 00:44:10,981 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4165 transitions. Word has length 97 [2022-03-20 00:44:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:10,981 INFO L478 AbstractCegarLoop]: Abstraction has 3021 states and 4165 transitions. [2022-03-20 00:44:10,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 00:44:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4165 transitions. [2022-03-20 00:44:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 00:44:10,983 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:10,983 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:10,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 00:44:11,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:11,199 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash 493698625, now seen corresponding path program 1 times [2022-03-20 00:44:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931877506] [2022-03-20 00:44:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:11,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:11,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:11,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433409920] [2022-03-20 00:44:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:11,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:11,232 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:11,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 00:44:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:44:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:44:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:44:11,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 00:44:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931877506] [2022-03-20 00:44:11,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433409920] [2022-03-20 00:44:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433409920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:11,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:11,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 00:44:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009784206] [2022-03-20 00:44:11,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:11,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 00:44:11,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 00:44:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 00:44:11,778 INFO L87 Difference]: Start difference. First operand 3021 states and 4165 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 00:44:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:13,611 INFO L93 Difference]: Finished difference Result 6728 states and 9679 transitions. [2022-03-20 00:44:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 00:44:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-03-20 00:44:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:13,633 INFO L225 Difference]: With dead ends: 6728 [2022-03-20 00:44:13,633 INFO L226 Difference]: Without dead ends: 5645 [2022-03-20 00:44:13,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 00:44:13,638 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 612 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:13,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 705 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 00:44:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2022-03-20 00:44:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5348. [2022-03-20 00:44:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 3600 states have (on average 1.2855555555555556) internal successors, (4628), 3622 states have internal predecessors, (4628), 1441 states have call successors, (1441), 308 states have call predecessors, (1441), 306 states have return successors, (1439), 1417 states have call predecessors, (1439), 1439 states have call successors, (1439) [2022-03-20 00:44:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 7508 transitions. [2022-03-20 00:44:14,893 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 7508 transitions. Word has length 98 [2022-03-20 00:44:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:14,893 INFO L478 AbstractCegarLoop]: Abstraction has 5348 states and 7508 transitions. [2022-03-20 00:44:14,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 00:44:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 7508 transitions. [2022-03-20 00:44:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 00:44:14,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:14,895 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:14,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 00:44:15,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:15,111 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 2 times [2022-03-20 00:44:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:15,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657400254] [2022-03-20 00:44:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:15,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:15,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220284145] [2022-03-20 00:44:15,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:15,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:15,118 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 00:44:15,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 00:44:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 00:44:16,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 00:44:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657400254] [2022-03-20 00:44:17,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220284145] [2022-03-20 00:44:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220284145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:17,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:17,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 00:44:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187520638] [2022-03-20 00:44:17,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:17,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 00:44:17,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 00:44:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-20 00:44:17,396 INFO L87 Difference]: Start difference. First operand 5348 states and 7508 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 00:44:21,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:26,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:30,736 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 [] [2022-03-20 00:44:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:31,642 INFO L93 Difference]: Finished difference Result 6299 states and 8817 transitions. [2022-03-20 00:44:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 00:44:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-03-20 00:44:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:31,671 INFO L225 Difference]: With dead ends: 6299 [2022-03-20 00:44:31,671 INFO L226 Difference]: Without dead ends: 6293 [2022-03-20 00:44:31,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 00:44:31,675 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 259 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 386 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:31,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 750 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1113 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2022-03-20 00:44:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2022-03-20 00:44:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 5701. [2022-03-20 00:44:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 3772 states have (on average 1.2932131495227996) internal successors, (4878), 3794 states have internal predecessors, (4878), 1597 states have call successors, (1597), 333 states have call predecessors, (1597), 331 states have return successors, (1595), 1573 states have call predecessors, (1595), 1595 states have call successors, (1595) [2022-03-20 00:44:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8070 transitions. [2022-03-20 00:44:33,552 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8070 transitions. Word has length 108 [2022-03-20 00:44:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:33,552 INFO L478 AbstractCegarLoop]: Abstraction has 5701 states and 8070 transitions. [2022-03-20 00:44:33,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 00:44:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8070 transitions. [2022-03-20 00:44:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 00:44:33,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:33,555 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:33,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 00:44:33,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 00:44:33,796 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash -193506847, now seen corresponding path program 1 times [2022-03-20 00:44:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:33,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975401107] [2022-03-20 00:44:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:33,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:33,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190881173] [2022-03-20 00:44:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:33,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:33,815 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:33,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 00:44:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:44:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 00:44:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:44:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 00:44:34,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975401107] [2022-03-20 00:44:34,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190881173] [2022-03-20 00:44:34,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190881173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:34,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:34,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 00:44:34,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877979869] [2022-03-20 00:44:34,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:34,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 00:44:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 00:44:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 00:44:34,353 INFO L87 Difference]: Start difference. First operand 5701 states and 8070 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 00:44:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:36,775 INFO L93 Difference]: Finished difference Result 9776 states and 13956 transitions. [2022-03-20 00:44:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 00:44:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-03-20 00:44:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:36,789 INFO L225 Difference]: With dead ends: 9776 [2022-03-20 00:44:36,789 INFO L226 Difference]: Without dead ends: 6603 [2022-03-20 00:44:36,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 00:44:36,795 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 765 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:36,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 578 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 00:44:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2022-03-20 00:44:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6434. [2022-03-20 00:44:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 4203 states have (on average 1.211753509398049) internal successors, (5093), 4221 states have internal predecessors, (5093), 1853 states have call successors, (1853), 379 states have call predecessors, (1853), 377 states have return successors, (1851), 1833 states have call predecessors, (1851), 1851 states have call successors, (1851) [2022-03-20 00:44:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 8797 transitions. [2022-03-20 00:44:38,452 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 8797 transitions. Word has length 105 [2022-03-20 00:44:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:38,454 INFO L478 AbstractCegarLoop]: Abstraction has 6434 states and 8797 transitions. [2022-03-20 00:44:38,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 00:44:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 8797 transitions. [2022-03-20 00:44:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 00:44:38,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:38,457 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:38,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 00:44:38,674 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 2 times [2022-03-20 00:44:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935325983] [2022-03-20 00:44:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:38,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:38,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795767619] [2022-03-20 00:44:38,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:38,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:38,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 00:44:38,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:38,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 00:44:38,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 00:44:39,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 00:44:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935325983] [2022-03-20 00:44:39,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795767619] [2022-03-20 00:44:39,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795767619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:39,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:39,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 00:44:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409319633] [2022-03-20 00:44:39,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:39,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 00:44:39,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:39,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 00:44:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 00:44:39,645 INFO L87 Difference]: Start difference. First operand 6434 states and 8797 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-20 00:44:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:44,096 INFO L93 Difference]: Finished difference Result 11813 states and 16841 transitions. [2022-03-20 00:44:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 00:44:44,096 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-03-20 00:44:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:44,148 INFO L225 Difference]: With dead ends: 11813 [2022-03-20 00:44:44,148 INFO L226 Difference]: Without dead ends: 11808 [2022-03-20 00:44:44,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 00:44:44,152 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 1166 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:44,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 821 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 00:44:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11808 states. [2022-03-20 00:44:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11808 to 11324. [2022-03-20 00:44:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 7570 states have (on average 1.2715984147952444) internal successors, (9626), 7660 states have internal predecessors, (9626), 3197 states have call successors, (3197), 558 states have call predecessors, (3197), 556 states have return successors, (3195), 3105 states have call predecessors, (3195), 3195 states have call successors, (3195) [2022-03-20 00:44:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 16018 transitions. [2022-03-20 00:44:47,586 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 16018 transitions. Word has length 132 [2022-03-20 00:44:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:47,587 INFO L478 AbstractCegarLoop]: Abstraction has 11324 states and 16018 transitions. [2022-03-20 00:44:47,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-20 00:44:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 16018 transitions. [2022-03-20 00:44:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 00:44:47,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:47,590 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:47,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:47,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 00:44:47,809 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 3 times [2022-03-20 00:44:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:47,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014280574] [2022-03-20 00:44:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:47,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506144506] [2022-03-20 00:44:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:44:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:47,829 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:47,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 00:44:47,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 00:44:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 00:44:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:49,093 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:44:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-03-20 00:44:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:55,943 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:44:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014280574] [2022-03-20 00:44:57,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506144506] [2022-03-20 00:44:57,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506144506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:44:57,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:44:57,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 00:44:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700637171] [2022-03-20 00:44:57,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:57,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 00:44:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 00:44:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=466, Unknown=3, NotChecked=0, Total=552 [2022-03-20 00:44:57,955 INFO L87 Difference]: Start difference. First operand 11324 states and 16018 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 00:45:00,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:02,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:04,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:08,362 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 [] [2022-03-20 00:45:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:12,422 INFO L93 Difference]: Finished difference Result 13257 states and 18727 transitions. [2022-03-20 00:45:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 00:45:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-03-20 00:45:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:12,493 INFO L225 Difference]: With dead ends: 13257 [2022-03-20 00:45:12,493 INFO L226 Difference]: Without dead ends: 13252 [2022-03-20 00:45:12,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=174, Invalid=945, Unknown=3, NotChecked=0, Total=1122 [2022-03-20 00:45:12,496 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 101 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 78 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:12,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 960 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 951 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2022-03-20 00:45:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2022-03-20 00:45:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 12853. [2022-03-20 00:45:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12853 states, 8548 states have (on average 1.2753860552175948) internal successors, (10902), 8650 states have internal predecessors, (10902), 3685 states have call successors, (3685), 621 states have call predecessors, (3685), 619 states have return successors, (3683), 3581 states have call predecessors, (3683), 3683 states have call successors, (3683) [2022-03-20 00:45:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12853 states to 12853 states and 18270 transitions. [2022-03-20 00:45:15,912 INFO L78 Accepts]: Start accepts. Automaton has 12853 states and 18270 transitions. Word has length 138 [2022-03-20 00:45:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:15,912 INFO L478 AbstractCegarLoop]: Abstraction has 12853 states and 18270 transitions. [2022-03-20 00:45:15,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 00:45:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12853 states and 18270 transitions. [2022-03-20 00:45:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 00:45:15,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:15,916 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:15,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:16,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 00:45:16,132 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 4 times [2022-03-20 00:45:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:16,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257192927] [2022-03-20 00:45:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:16,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743943265] [2022-03-20 00:45:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:45:16,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:16,141 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:16,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 00:45:16,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:45:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:45:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 00:45:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 00:45:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:18,101 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:45:20,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257192927] [2022-03-20 00:45:20,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743943265] [2022-03-20 00:45:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743943265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:45:20,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:45:20,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 00:45:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107684096] [2022-03-20 00:45:20,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:20,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 00:45:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 00:45:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-20 00:45:20,524 INFO L87 Difference]: Start difference. First operand 12853 states and 18270 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:45:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:26,241 INFO L93 Difference]: Finished difference Result 13802 states and 19539 transitions. [2022-03-20 00:45:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 00:45:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-03-20 00:45:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:26,269 INFO L225 Difference]: With dead ends: 13802 [2022-03-20 00:45:26,269 INFO L226 Difference]: Without dead ends: 13797 [2022-03-20 00:45:26,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 00:45:26,273 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 129 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:26,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1651 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 00:45:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-03-20 00:45:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 13485. [2022-03-20 00:45:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13485 states, 8906 states have (on average 1.2765551313721086) internal successors, (11369), 9012 states have internal predecessors, (11369), 3916 states have call successors, (3916), 664 states have call predecessors, (3916), 662 states have return successors, (3914), 3808 states have call predecessors, (3914), 3914 states have call successors, (3914) [2022-03-20 00:45:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13485 states to 13485 states and 19199 transitions. [2022-03-20 00:45:29,750 INFO L78 Accepts]: Start accepts. Automaton has 13485 states and 19199 transitions. Word has length 145 [2022-03-20 00:45:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:29,750 INFO L478 AbstractCegarLoop]: Abstraction has 13485 states and 19199 transitions. [2022-03-20 00:45:29,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:45:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 13485 states and 19199 transitions. [2022-03-20 00:45:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 00:45:29,756 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:29,756 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:29,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 00:45:29,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 00:45:29,974 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1374627344, now seen corresponding path program 5 times [2022-03-20 00:45:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:29,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438260249] [2022-03-20 00:45:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:29,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9148616] [2022-03-20 00:45:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 00:45:29,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:29,983 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:29,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 00:45:30,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 00:45:30,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:45:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 00:45:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-03-20 00:45:32,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-03-20 00:45:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:39,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438260249] [2022-03-20 00:45:39,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:39,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9148616] [2022-03-20 00:45:39,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9148616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:39,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:39,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-03-20 00:45:39,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203845344] [2022-03-20 00:45:39,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:39,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 00:45:39,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:39,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 00:45:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 00:45:39,132 INFO L87 Difference]: Start difference. First operand 13485 states and 19199 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 00:45:55,533 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 [] [2022-03-20 00:45:57,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:11,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:23,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:04,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:22,543 WARN L232 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 99 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:47:33,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:43,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:45,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:54,504 WARN L232 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 114 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:00,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:48:13,651 INFO L93 Difference]: Finished difference Result 19994 states and 28830 transitions. [2022-03-20 00:48:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 00:48:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-03-20 00:48:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:48:13,711 INFO L225 Difference]: With dead ends: 19994 [2022-03-20 00:48:13,712 INFO L226 Difference]: Without dead ends: 19988 [2022-03-20 00:48:13,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 91.9s TimeCoverageRelationStatistics Valid=2339, Invalid=10543, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 00:48:13,723 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 417 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 762 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.8s IncrementalHoareTripleChecker+Time [2022-03-20 00:48:13,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 2309 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 3203 Invalid, 9 Unknown, 0 Unchecked, 60.8s Time] [2022-03-20 00:48:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19988 states. [2022-03-20 00:48:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19988 to 16439. [2022-03-20 00:48:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16439 states, 10876 states have (on average 1.2932144170650974) internal successors, (14065), 11004 states have internal predecessors, (14065), 4793 states have call successors, (4793), 771 states have call predecessors, (4793), 769 states have return successors, (4791), 4663 states have call predecessors, (4791), 4791 states have call successors, (4791) [2022-03-20 00:48:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 23649 transitions. [2022-03-20 00:48:20,714 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 23649 transitions. Word has length 161 [2022-03-20 00:48:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:48:20,715 INFO L478 AbstractCegarLoop]: Abstraction has 16439 states and 23649 transitions. [2022-03-20 00:48:20,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 00:48:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 23649 transitions. [2022-03-20 00:48:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 00:48:20,721 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:48:20,721 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:48:20,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 00:48:20,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:48:20,927 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:48:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:48:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 517653114, now seen corresponding path program 6 times [2022-03-20 00:48:20,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:48:20,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601831168] [2022-03-20 00:48:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:48:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:48:20,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:48:20,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859309708] [2022-03-20 00:48:20,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 00:48:20,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:48:20,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:48:20,942 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:48:20,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 00:48:21,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 00:48:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:48:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 00:48:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:48:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-03-20 00:48:21,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:48:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 00:48:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:48:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601831168] [2022-03-20 00:48:21,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:48:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859309708] [2022-03-20 00:48:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859309708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:48:21,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:48:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 00:48:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979163196] [2022-03-20 00:48:21,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:48:21,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:48:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:48:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:48:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:48:21,511 INFO L87 Difference]: Start difference. First operand 16439 states and 23649 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-20 00:48:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:48:30,370 INFO L93 Difference]: Finished difference Result 33594 states and 49028 transitions. [2022-03-20 00:48:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:48:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-03-20 00:48:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:48:30,419 INFO L225 Difference]: With dead ends: 33594 [2022-03-20 00:48:30,420 INFO L226 Difference]: Without dead ends: 21850 [2022-03-20 00:48:30,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:48:30,443 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:48:30,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 335 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:48:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21850 states. [2022-03-20 00:48:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21850 to 19647. [2022-03-20 00:48:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19647 states, 12993 states have (on average 1.317016855229739) internal successors, (17112), 13282 states have internal predecessors, (17112), 5930 states have call successors, (5930), 725 states have call predecessors, (5930), 723 states have return successors, (5928), 5639 states have call predecessors, (5928), 5928 states have call successors, (5928) [2022-03-20 00:48:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19647 states to 19647 states and 28970 transitions. [2022-03-20 00:48:38,200 INFO L78 Accepts]: Start accepts. Automaton has 19647 states and 28970 transitions. Word has length 165 [2022-03-20 00:48:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:48:38,200 INFO L478 AbstractCegarLoop]: Abstraction has 19647 states and 28970 transitions. [2022-03-20 00:48:38,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-20 00:48:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 19647 states and 28970 transitions. [2022-03-20 00:48:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 00:48:38,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:48:38,206 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:48:38,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 00:48:38,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 00:48:38,423 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:48:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:48:38,423 INFO L85 PathProgramCache]: Analyzing trace with hash -876035589, now seen corresponding path program 7 times [2022-03-20 00:48:38,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:48:38,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046964136] [2022-03-20 00:48:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:48:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:48:38,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:48:38,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874003416] [2022-03-20 00:48:38,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 00:48:38,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:48:38,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:48:38,437 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:48:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 00:48:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:48:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 00:48:38,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:48:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 183 proven. 171 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-20 00:48:40,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:48:40,552 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:48:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:48:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046964136] [2022-03-20 00:48:42,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:48:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874003416] [2022-03-20 00:48:42,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874003416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:48:42,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:48:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 00:48:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690218686] [2022-03-20 00:48:42,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:48:42,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 00:48:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:48:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 00:48:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:48:42,581 INFO L87 Difference]: Start difference. First operand 19647 states and 28970 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 00:48:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:48:52,895 INFO L93 Difference]: Finished difference Result 20713 states and 30467 transitions. [2022-03-20 00:48:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 00:48:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 168 [2022-03-20 00:48:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:48:52,941 INFO L225 Difference]: With dead ends: 20713 [2022-03-20 00:48:52,941 INFO L226 Difference]: Without dead ends: 20708 [2022-03-20 00:48:52,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 00:48:52,949 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 128 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:48:52,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1767 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 00:48:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20708 states. [2022-03-20 00:49:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20708 to 19857. [2022-03-20 00:49:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19857 states, 13117 states have (on average 1.3153922390790578) internal successors, (17254), 13412 states have internal predecessors, (17254), 5999 states have call successors, (5999), 742 states have call predecessors, (5999), 740 states have return successors, (5997), 5702 states have call predecessors, (5997), 5997 states have call successors, (5997) [2022-03-20 00:49:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19857 states to 19857 states and 29250 transitions. [2022-03-20 00:49:00,864 INFO L78 Accepts]: Start accepts. Automaton has 19857 states and 29250 transitions. Word has length 168 [2022-03-20 00:49:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:49:00,864 INFO L478 AbstractCegarLoop]: Abstraction has 19857 states and 29250 transitions. [2022-03-20 00:49:00,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 00:49:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 19857 states and 29250 transitions. [2022-03-20 00:49:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-20 00:49:00,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:49:00,871 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:49:00,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 00:49:01,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:01,088 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:49:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:49:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1685661297, now seen corresponding path program 8 times [2022-03-20 00:49:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:49:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508512013] [2022-03-20 00:49:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:49:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:49:01,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:49:01,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053739895] [2022-03-20 00:49:01,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:49:01,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:49:01,110 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:49:01,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 00:49:01,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:49:01,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:49:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-20 00:49:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:49:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 315 proven. 205 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 00:49:03,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:49:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 325 proven. 4 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-03-20 00:49:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:49:25,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508512013] [2022-03-20 00:49:25,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:49:25,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053739895] [2022-03-20 00:49:25,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053739895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:49:25,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:49:25,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-03-20 00:49:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806667124] [2022-03-20 00:49:25,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:49:25,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 00:49:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:49:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 00:49:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-20 00:49:25,162 INFO L87 Difference]: Start difference. First operand 19857 states and 29250 transitions. Second operand has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) [2022-03-20 00:49:42,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:44,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:08,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:18,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:26,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:28,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:30,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:32,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:37,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:40,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:50:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:50:49,783 INFO L93 Difference]: Finished difference Result 23785 states and 35376 transitions. [2022-03-20 00:50:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 00:50:49,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) Word has length 188 [2022-03-20 00:50:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:50:49,847 INFO L225 Difference]: With dead ends: 23785 [2022-03-20 00:50:49,847 INFO L226 Difference]: Without dead ends: 23779 [2022-03-20 00:50:49,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=1089, Invalid=6743, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 00:50:49,856 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 256 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 423 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:50:49,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1314 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1956 Invalid, 5 Unknown, 0 Unchecked, 49.3s Time] [2022-03-20 00:50:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23779 states. [2022-03-20 00:50:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23779 to 18080. [2022-03-20 00:50:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18080 states, 11759 states have (on average 1.3061484820137768) internal successors, (15359), 12046 states have internal predecessors, (15359), 5570 states have call successors, (5570), 752 states have call predecessors, (5570), 750 states have return successors, (5568), 5281 states have call predecessors, (5568), 5568 states have call successors, (5568) [2022-03-20 00:50:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18080 states to 18080 states and 26497 transitions. [2022-03-20 00:50:57,599 INFO L78 Accepts]: Start accepts. Automaton has 18080 states and 26497 transitions. Word has length 188 [2022-03-20 00:50:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:50:57,599 INFO L478 AbstractCegarLoop]: Abstraction has 18080 states and 26497 transitions. [2022-03-20 00:50:57,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) [2022-03-20 00:50:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 18080 states and 26497 transitions. [2022-03-20 00:50:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-20 00:50:57,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:50:57,606 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:50:57,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 00:50:57,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:57,819 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:50:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:50:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash 141850999, now seen corresponding path program 1 times [2022-03-20 00:50:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:50:57,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593744653] [2022-03-20 00:50:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:57,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:50:57,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:50:57,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026030898] [2022-03-20 00:50:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:50:57,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:50:57,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:50:57,836 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:50:57,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 00:50:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:50:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 00:50:57,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:50:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 897 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 00:50:58,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:50:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 257 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 00:50:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:50:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593744653] [2022-03-20 00:50:59,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:50:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026030898] [2022-03-20 00:50:59,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026030898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:50:59,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:50:59,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 00:50:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481227212] [2022-03-20 00:50:59,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:50:59,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 00:50:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:50:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 00:50:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 00:50:59,193 INFO L87 Difference]: Start difference. First operand 18080 states and 26497 transitions. Second operand has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-03-20 00:51:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:51:12,725 INFO L93 Difference]: Finished difference Result 32268 states and 48682 transitions. [2022-03-20 00:51:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 00:51:12,725 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 196 [2022-03-20 00:51:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:51:12,791 INFO L225 Difference]: With dead ends: 32268 [2022-03-20 00:51:12,791 INFO L226 Difference]: Without dead ends: 28608 [2022-03-20 00:51:12,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2609, Invalid=4531, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 00:51:12,806 INFO L913 BasicCegarLoop]: 197 mSDtfsCounter, 1629 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 00:51:12,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1629 Valid, 1310 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 00:51:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28608 states. [2022-03-20 00:51:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28608 to 28110. [2022-03-20 00:51:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28110 states, 18010 states have (on average 1.2953359244863965) internal successors, (23329), 18369 states have internal predecessors, (23329), 8963 states have call successors, (8963), 1138 states have call predecessors, (8963), 1136 states have return successors, (8961), 8602 states have call predecessors, (8961), 8961 states have call successors, (8961) [2022-03-20 00:51:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28110 states to 28110 states and 41253 transitions. [2022-03-20 00:51:25,814 INFO L78 Accepts]: Start accepts. Automaton has 28110 states and 41253 transitions. Word has length 196 [2022-03-20 00:51:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:51:25,815 INFO L478 AbstractCegarLoop]: Abstraction has 28110 states and 41253 transitions. [2022-03-20 00:51:25,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-03-20 00:51:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28110 states and 41253 transitions. [2022-03-20 00:51:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 00:51:25,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:51:25,829 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:51:25,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 00:51:26,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 00:51:26,048 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:51:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:51:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2004431571, now seen corresponding path program 2 times [2022-03-20 00:51:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:51:26,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816195953] [2022-03-20 00:51:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:51:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:51:26,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:51:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006680775] [2022-03-20 00:51:26,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:51:26,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:51:26,099 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:51:26,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 00:51:26,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:51:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:51:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 00:51:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:51:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 950 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 00:51:26,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:51:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 310 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 00:51:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:51:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816195953] [2022-03-20 00:51:27,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:51:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006680775] [2022-03-20 00:51:27,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006680775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:51:27,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:51:27,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 00:51:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440760049] [2022-03-20 00:51:27,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:51:27,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 00:51:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:51:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 00:51:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 00:51:27,564 INFO L87 Difference]: Start difference. First operand 28110 states and 41253 transitions. Second operand has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-03-20 00:51:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:51:43,376 INFO L93 Difference]: Finished difference Result 43612 states and 65007 transitions. [2022-03-20 00:51:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 00:51:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 207 [2022-03-20 00:51:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:51:43,443 INFO L225 Difference]: With dead ends: 43612 [2022-03-20 00:51:43,443 INFO L226 Difference]: Without dead ends: 29398 [2022-03-20 00:51:43,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3132, Invalid=5424, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 00:51:43,474 INFO L913 BasicCegarLoop]: 215 mSDtfsCounter, 1578 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:51:43,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 1404 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1018 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 00:51:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29398 states. [2022-03-20 00:51:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29398 to 29113. [2022-03-20 00:51:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29113 states, 17803 states have (on average 1.207493119137224) internal successors, (21497), 18138 states have internal predecessors, (21497), 10045 states have call successors, (10045), 1266 states have call predecessors, (10045), 1264 states have return successors, (10043), 9708 states have call predecessors, (10043), 10043 states have call successors, (10043) [2022-03-20 00:51:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29113 states to 29113 states and 41585 transitions. [2022-03-20 00:51:57,405 INFO L78 Accepts]: Start accepts. Automaton has 29113 states and 41585 transitions. Word has length 207 [2022-03-20 00:51:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:51:57,406 INFO L478 AbstractCegarLoop]: Abstraction has 29113 states and 41585 transitions. [2022-03-20 00:51:57,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-03-20 00:51:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29113 states and 41585 transitions. [2022-03-20 00:51:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-20 00:51:57,426 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:51:57,426 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 15, 15, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:51:57,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 00:51:57,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 00:51:57,627 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:51:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:51:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash 150663480, now seen corresponding path program 3 times [2022-03-20 00:51:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:51:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312682148] [2022-03-20 00:51:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:51:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:51:57,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:51:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975093235] [2022-03-20 00:51:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:51:57,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:51:57,637 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:51:57,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 00:52:45,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 00:52:45,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:52:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 00:52:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:52:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 1955 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 00:52:45,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:52:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 611 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-20 00:52:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:52:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312682148] [2022-03-20 00:52:46,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:52:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975093235] [2022-03-20 00:52:46,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975093235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:52:46,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:52:46,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-20 00:52:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581650892] [2022-03-20 00:52:46,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:52:46,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 00:52:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:52:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 00:52:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 00:52:46,793 INFO L87 Difference]: Start difference. First operand 29113 states and 41585 transitions. Second operand has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-03-20 00:53:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:53:05,598 INFO L93 Difference]: Finished difference Result 33641 states and 48486 transitions. [2022-03-20 00:53:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 00:53:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) Word has length 268 [2022-03-20 00:53:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:53:05,678 INFO L225 Difference]: With dead ends: 33641 [2022-03-20 00:53:05,678 INFO L226 Difference]: Without dead ends: 33636 [2022-03-20 00:53:05,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3713, Invalid=6387, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 00:53:05,689 INFO L913 BasicCegarLoop]: 234 mSDtfsCounter, 1840 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:53:05,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 1254 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1436 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 00:53:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33636 states. [2022-03-20 00:53:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33636 to 33045. [2022-03-20 00:53:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33045 states, 20346 states have (on average 1.2263344146269537) internal successors, (24951), 20801 states have internal predecessors, (24951), 11310 states have call successors, (11310), 1390 states have call predecessors, (11310), 1388 states have return successors, (11308), 10853 states have call predecessors, (11308), 11308 states have call successors, (11308) [2022-03-20 00:53:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33045 states to 33045 states and 47569 transitions. [2022-03-20 00:53:21,390 INFO L78 Accepts]: Start accepts. Automaton has 33045 states and 47569 transitions. Word has length 268 [2022-03-20 00:53:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:53:21,391 INFO L478 AbstractCegarLoop]: Abstraction has 33045 states and 47569 transitions. [2022-03-20 00:53:21,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-03-20 00:53:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33045 states and 47569 transitions. [2022-03-20 00:53:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-03-20 00:53:21,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:53:21,424 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 22, 21, 13, 13, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:53:21,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 00:53:21,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 00:53:21,632 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:53:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:53:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1876047454, now seen corresponding path program 2 times [2022-03-20 00:53:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:53:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131800686] [2022-03-20 00:53:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:53:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:53:21,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:53:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497989400] [2022-03-20 00:53:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:53:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:53:21,654 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:53:21,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 00:53:21,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:53:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:53:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 00:53:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:53:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 4165 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 00:53:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:53:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 1285 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-20 00:53:23,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:53:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131800686] [2022-03-20 00:53:23,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:53:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497989400] [2022-03-20 00:53:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497989400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:53:23,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:53:23,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-03-20 00:53:23,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692314717] [2022-03-20 00:53:23,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:53:23,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 00:53:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:53:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 00:53:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 00:53:23,984 INFO L87 Difference]: Start difference. First operand 33045 states and 47569 transitions. Second operand has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-03-20 00:53:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:53:42,165 INFO L93 Difference]: Finished difference Result 34949 states and 50413 transitions. [2022-03-20 00:53:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 00:53:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) Word has length 377 [2022-03-20 00:53:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:53:42,249 INFO L225 Difference]: With dead ends: 34949 [2022-03-20 00:53:42,250 INFO L226 Difference]: Without dead ends: 32769 [2022-03-20 00:53:42,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 700 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3724, Invalid=6376, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 00:53:42,275 INFO L913 BasicCegarLoop]: 229 mSDtfsCounter, 1928 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 1537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1928 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1537 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:53:42,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1928 Valid, 1384 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1537 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 00:53:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32769 states. [2022-03-20 00:53:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32769 to 32625. [2022-03-20 00:53:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32625 states, 19997 states have (on average 1.2088313246987048) internal successors, (24173), 20368 states have internal predecessors, (24173), 11235 states have call successors, (11235), 1394 states have call predecessors, (11235), 1392 states have return successors, (11233), 10862 states have call predecessors, (11233), 11233 states have call successors, (11233) [2022-03-20 00:53:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32625 states to 32625 states and 46641 transitions. [2022-03-20 00:53:59,463 INFO L78 Accepts]: Start accepts. Automaton has 32625 states and 46641 transitions. Word has length 377 [2022-03-20 00:53:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:53:59,464 INFO L478 AbstractCegarLoop]: Abstraction has 32625 states and 46641 transitions. [2022-03-20 00:53:59,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-03-20 00:53:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32625 states and 46641 transitions. [2022-03-20 00:53:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-03-20 00:53:59,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:53:59,502 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 24, 24, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:53:59,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 00:53:59,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:59,715 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:53:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:53:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash -671688507, now seen corresponding path program 3 times [2022-03-20 00:53:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:53:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623881289] [2022-03-20 00:53:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:53:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:53:59,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:53:59,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348301993] [2022-03-20 00:53:59,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:53:59,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:53:59,732 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:53:59,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 00:53:59,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:53:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:53:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 00:53:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:54:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-03-20 00:54:00,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:54:00,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:54:00,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623881289] [2022-03-20 00:54:00,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:54:00,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348301993] [2022-03-20 00:54:00,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348301993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:54:00,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:54:00,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:54:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473276134] [2022-03-20 00:54:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:54:00,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:54:00,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:54:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:54:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:54:00,331 INFO L87 Difference]: Start difference. First operand 32625 states and 46641 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 00:54:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:54:17,131 INFO L93 Difference]: Finished difference Result 34691 states and 49752 transitions. [2022-03-20 00:54:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:54:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 411 [2022-03-20 00:54:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:54:17,224 INFO L225 Difference]: With dead ends: 34691 [2022-03-20 00:54:17,224 INFO L226 Difference]: Without dead ends: 33766 [2022-03-20 00:54:17,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:54:17,238 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:54:17,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 247 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:54:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33766 states. [2022-03-20 00:54:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33766 to 32981. [2022-03-20 00:54:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32981 states, 20112 states have (on average 1.2077863961813842) internal successors, (24291), 20497 states have internal predecessors, (24291), 11441 states have call successors, (11441), 1429 states have call predecessors, (11441), 1427 states have return successors, (11439), 11054 states have call predecessors, (11439), 11439 states have call successors, (11439) [2022-03-20 00:54:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32981 states to 32981 states and 47171 transitions. [2022-03-20 00:54:35,553 INFO L78 Accepts]: Start accepts. Automaton has 32981 states and 47171 transitions. Word has length 411 [2022-03-20 00:54:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:54:35,554 INFO L478 AbstractCegarLoop]: Abstraction has 32981 states and 47171 transitions. [2022-03-20 00:54:35,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 00:54:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 32981 states and 47171 transitions. [2022-03-20 00:54:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-03-20 00:54:35,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:54:35,595 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 25, 25, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:54:35,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 00:54:35,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 00:54:35,814 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:54:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:54:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1935008670, now seen corresponding path program 1 times [2022-03-20 00:54:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:54:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885992794] [2022-03-20 00:54:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:54:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:54:35,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:54:35,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647318943] [2022-03-20 00:54:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:54:35,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:54:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:54:35,852 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:54:35,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 00:54:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:54:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 00:54:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:54:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 4994 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-20 00:54:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:54:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 1474 refuted. 0 times theorem prover too weak. 3792 trivial. 0 not checked. [2022-03-20 00:54:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:54:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885992794] [2022-03-20 00:54:37,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:54:37,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647318943] [2022-03-20 00:54:37,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647318943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:54:37,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:54:37,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-03-20 00:54:37,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669783714] [2022-03-20 00:54:37,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:54:37,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 00:54:37,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:54:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 00:54:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 00:54:37,856 INFO L87 Difference]: Start difference. First operand 32981 states and 47171 transitions. Second operand has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-03-20 00:54:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:54:56,687 INFO L93 Difference]: Finished difference Result 33634 states and 48150 transitions. [2022-03-20 00:54:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 00:54:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) Word has length 416 [2022-03-20 00:54:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:54:56,757 INFO L225 Difference]: With dead ends: 33634 [2022-03-20 00:54:56,757 INFO L226 Difference]: Without dead ends: 32754 [2022-03-20 00:54:56,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3726, Invalid=6374, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 00:54:56,770 INFO L913 BasicCegarLoop]: 229 mSDtfsCounter, 1786 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:54:56,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1786 Valid, 1171 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1395 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 00:54:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32754 states. [2022-03-20 00:55:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32754 to 32754. [2022-03-20 00:55:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32754 states, 19966 states have (on average 1.195632575378143) internal successors, (23872), 20335 states have internal predecessors, (23872), 11376 states have call successors, (11376), 1413 states have call predecessors, (11376), 1411 states have return successors, (11374), 11005 states have call predecessors, (11374), 11374 states have call successors, (11374) [2022-03-20 00:55:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32754 states to 32754 states and 46622 transitions. [2022-03-20 00:55:12,886 INFO L78 Accepts]: Start accepts. Automaton has 32754 states and 46622 transitions. Word has length 416 [2022-03-20 00:55:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:55:12,887 INFO L478 AbstractCegarLoop]: Abstraction has 32754 states and 46622 transitions. [2022-03-20 00:55:12,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-03-20 00:55:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32754 states and 46622 transitions. [2022-03-20 00:55:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-03-20 00:55:12,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:55:12,917 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 25, 25, 14, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:55:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 00:55:13,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 00:55:13,131 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:55:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:55:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1592840884, now seen corresponding path program 4 times [2022-03-20 00:55:13,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:55:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99831693] [2022-03-20 00:55:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:55:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:55:13,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:55:13,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324373865] [2022-03-20 00:55:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:55:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:55:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:55:13,146 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:55:13,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 00:55:15,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:55:15,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 00:55:15,138 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 00:55:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 00:55:15,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 00:55:15,876 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 00:55:15,876 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 00:55:15,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 00:55:16,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 00:55:16,089 INFO L719 BasicCegarLoop]: Path program histogram: [8, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:55:16,093 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 00:55:16,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:55:16 BoogieIcfgContainer [2022-03-20 00:55:16,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 00:55:16,223 INFO L158 Benchmark]: Toolchain (without parser) took 806004.00ms. Allocated memory was 168.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 110.6MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-03-20 00:55:16,223 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 168.8MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 00:55:16,223 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.31ms. Allocated memory was 168.8MB in the beginning and 215.0MB in the end (delta: 46.1MB). Free memory was 110.3MB in the beginning and 186.2MB in the end (delta: -75.9MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. [2022-03-20 00:55:16,223 INFO L158 Benchmark]: Boogie Preprocessor took 20.36ms. Allocated memory is still 215.0MB. Free memory was 186.2MB in the beginning and 184.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 00:55:16,223 INFO L158 Benchmark]: RCFGBuilder took 338.43ms. Allocated memory is still 215.0MB. Free memory was 184.7MB in the beginning and 172.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 00:55:16,224 INFO L158 Benchmark]: TraceAbstraction took 805420.81ms. Allocated memory was 215.0MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 172.1MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-03-20 00:55:16,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 168.8MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.31ms. Allocated memory was 168.8MB in the beginning and 215.0MB in the end (delta: 46.1MB). Free memory was 110.3MB in the beginning and 186.2MB in the end (delta: -75.9MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.36ms. Allocated memory is still 215.0MB. Free memory was 186.2MB in the beginning and 184.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 338.43ms. Allocated memory is still 215.0MB. Free memory was 184.7MB in the beginning and 172.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 805420.81ms. Allocated memory was 215.0MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 172.1MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=53, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=377, y=610] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=377, y=610] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=377, b=610, counter=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=610, c=377, counter=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=610, b=377, c=377, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=377, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=610, b=377, c=610, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=610, b=377, c=233, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=377, b=233, c=233, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=233, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=233, c=377, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=377, b=233, c=144, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=233, b=144, c=144, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=144, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=233, b=144, c=233, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=233, b=144, c=89, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=144, b=89, c=89, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=89, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=144, b=89, c=144, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=144, b=89, c=55, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=89, b=55, c=55, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=55, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=89, b=55, c=89, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=89, b=55, c=34, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=55, b=34, c=34, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=34, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=55, b=34, c=55, counter=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, counter++=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, counter++=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=55, b=34, c=21, counter=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, counter++=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=34, b=21, c=21, counter=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=21, counter=27, counter++=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=34, b=21, c=34, counter=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, counter++=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, counter++=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=34, b=21, c=13, counter=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, counter++=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=31, counter++=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, counter++=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, counter++=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, counter++=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=35, counter++=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, counter++=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, counter++=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, counter++=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=39, counter++=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, counter++=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, counter++=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, counter++=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=43, counter++=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, counter++=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, counter++=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, counter++=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=47, counter++=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=48, counter++=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, counter++=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, counter++=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=51, counter++=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] COND FALSE !(counter++<50) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=51] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 805.3s, OverallIterations: 40, TraceHistogramMax: 49, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.3s, AutomataDifference: 521.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 35 mSolverCounterUnknown, 15355 SdHoareTripleChecker+Valid, 203.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15211 mSDsluCounter, 25809 SdHoareTripleChecker+Invalid, 199.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22306 mSDsCounter, 11877 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23905 IncrementalHoareTripleChecker+Invalid, 35817 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11877 mSolverCounterUnsat, 3503 mSDtfsCounter, 23905 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8254 GetRequests, 6852 SyntacticMatches, 30 SemanticMatches, 1372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20049 ImplicationChecksByTransitivity, 203.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33045occurred in iteration=36, InterpolantAutomatonStates: 1236, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 143.4s AutomataMinimizationTime, 39 MinimizatonAttempts, 18606 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 51.1s SatisfiabilityAnalysisTime, 77.6s InterpolantComputationTime, 4790 NumberOfCodeBlocks, 4290 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 7382 ConstructedInterpolants, 0 QuantifiedInterpolants, 37030 SizeOfPredicates, 419 NumberOfNonLiveVariables, 11454 ConjunctsInSsa, 1498 ConjunctsInUnsatCore, 63 InterpolantComputations, 13 PerfectInterpolantSequences, 27877/46851 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 00:55:16,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...