/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/prodbin-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 01:57:01,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 01:57:01,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 01:57:01,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 01:57:01,078 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 01:57:01,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 01:57:01,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 01:57:01,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 01:57:01,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 01:57:01,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 01:57:01,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 01:57:01,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 01:57:01,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 01:57:01,105 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 01:57:01,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 01:57:01,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 01:57:01,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 01:57:01,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:57:01,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 01:57:01,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 01:57:01,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 01:57:01,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 01:57:01,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 01:57:01,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 01:57:01,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 01:57:01,314 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 01:57:01,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-03-20 01:57:01,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b07446d/c042b300ac124e3fb3c91da2a1246537/FLAG306b840be [2022-03-20 01:57:01,665 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 01:57:01,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-03-20 01:57:01,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b07446d/c042b300ac124e3fb3c91da2a1246537/FLAG306b840be [2022-03-20 01:57:02,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b07446d/c042b300ac124e3fb3c91da2a1246537 [2022-03-20 01:57:02,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 01:57:02,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 01:57:02,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 01:57:02,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 01:57:02,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 01:57:02,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a791cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02, skipping insertion in model container [2022-03-20 01:57:02,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 01:57:02,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 01:57:02,225 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/prodbin-ll_unwindbound20.c[537,550] [2022-03-20 01:57:02,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:57:02,261 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 01:57:02,272 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/prodbin-ll_unwindbound20.c[537,550] [2022-03-20 01:57:02,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:57:02,297 INFO L208 MainTranslator]: Completed translation [2022-03-20 01:57:02,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02 WrapperNode [2022-03-20 01:57:02,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 01:57:02,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 01:57:02,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 01:57:02,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 01:57:02,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 01:57:02,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 01:57:02,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 01:57:02,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 01:57:02,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (1/1) ... [2022-03-20 01:57:02,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:57:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:02,360 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 01:57:02,379 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 01:57:02,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 01:57:02,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 01:57:02,398 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 01:57:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 01:57:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 01:57:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 01:57:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 01:57:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 01:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 01:57:02,450 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 01:57:02,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 01:57:02,583 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 01:57:02,587 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 01:57:02,587 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 01:57:02,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:57:02 BoogieIcfgContainer [2022-03-20 01:57:02,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 01:57:02,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 01:57:02,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 01:57:02,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 01:57:02,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:57:02" (1/3) ... [2022-03-20 01:57:02,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d952989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:57:02, skipping insertion in model container [2022-03-20 01:57:02,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:57:02" (2/3) ... [2022-03-20 01:57:02,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d952989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:57:02, skipping insertion in model container [2022-03-20 01:57:02,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:57:02" (3/3) ... [2022-03-20 01:57:02,596 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2022-03-20 01:57:02,599 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 01:57:02,600 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 01:57:02,647 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 01:57:02,652 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 01:57:02,652 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 01:57:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 01:57:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 01:57:02,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:02,681 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:02,681 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-03-20 01:57:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829341874] [2022-03-20 01:57:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:57:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:57:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:02,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829341874] [2022-03-20 01:57:02,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829341874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:57:02,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:57:02,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 01:57:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853392712] [2022-03-20 01:57:02,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:57:02,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 01:57:02,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 01:57:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:57:02,858 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 01:57:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:02,913 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 01:57:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 01:57:02,916 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 01:57:02,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:02,923 INFO L225 Difference]: With dead ends: 52 [2022-03-20 01:57:02,923 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 01:57:02,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 01:57:02,931 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:02,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:57:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 01:57:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 01:57:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 01:57:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 01:57:02,963 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-20 01:57:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:02,963 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 01:57:02,963 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 01:57:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 01:57:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 01:57:02,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:02,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:02,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 01:57:02,965 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-03-20 01:57:02,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:02,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549731878] [2022-03-20 01:57:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:02,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:02,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:02,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347813796] [2022-03-20 01:57:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:02,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:03,000 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 01:57:03,001 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 01:57:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 01:57:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:03,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:57:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549731878] [2022-03-20 01:57:03,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347813796] [2022-03-20 01:57:03,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347813796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:57:03,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:57:03,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 01:57:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107876324] [2022-03-20 01:57:03,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:57:03,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 01:57:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 01:57:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 01:57:03,167 INFO L87 Difference]: Start difference. First operand 25 states and 28 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 01:57:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:03,181 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 01:57:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 01:57:03,183 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 01:57:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:03,186 INFO L225 Difference]: With dead ends: 34 [2022-03-20 01:57:03,188 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 01:57:03,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 01:57:03,189 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:03,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:57:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 01:57:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 01:57:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 01:57:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 01:57:03,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-20 01:57:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:03,194 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 01:57:03,194 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 01:57:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 01:57:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 01:57:03,195 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:03,195 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:03,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 01:57:03,400 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 01:57:03,401 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-03-20 01:57:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:03,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080532561] [2022-03-20 01:57:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:03,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:03,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765289433] [2022-03-20 01:57:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:03,412 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 01:57:03,414 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 01:57:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:57:03,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:03,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:57:03,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080532561] [2022-03-20 01:57:03,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:03,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765289433] [2022-03-20 01:57:03,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765289433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:57:03,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:57:03,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:57:03,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447160817] [2022-03-20 01:57:03,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:57:03,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:57:03,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:57:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:57:03,526 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 01:57:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:03,555 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-20 01:57:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:57:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 01:57:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:03,556 INFO L225 Difference]: With dead ends: 38 [2022-03-20 01:57:03,556 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 01:57:03,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 01:57:03,558 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:03,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:57:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 01:57:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-20 01:57:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 01:57:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 01:57:03,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 01:57:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:03,564 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 01:57:03,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 01:57:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 01:57:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 01:57:03,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:03,565 INFO L499 BasicCegarLoop]: trace histogram [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 01:57:03,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 01:57:03,765 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 01:57:03,766 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-03-20 01:57:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:03,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453893648] [2022-03-20 01:57:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:03,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518280284] [2022-03-20 01:57:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:03,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:03,784 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 01:57:03,805 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 01:57:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:57:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:03,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:57:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453893648] [2022-03-20 01:57:03,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518280284] [2022-03-20 01:57:03,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518280284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:57:03,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:57:03,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:57:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778713972] [2022-03-20 01:57:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:57:03,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:57:03,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:57:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:57:03,887 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 01:57:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:03,918 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 01:57:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 01:57:03,918 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 01:57:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:03,919 INFO L225 Difference]: With dead ends: 42 [2022-03-20 01:57:03,919 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 01:57:03,919 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 01:57:03,920 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:03,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:57:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 01:57:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 01:57:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 01:57:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 01:57:03,926 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-20 01:57:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:03,927 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 01:57:03,927 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 01:57:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 01:57:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:57:03,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:03,928 INFO L499 BasicCegarLoop]: trace histogram [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 01:57:03,947 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 01:57:04,147 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 01:57:04,148 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-03-20 01:57:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349476556] [2022-03-20 01:57:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:04,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104421895] [2022-03-20 01:57:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:04,186 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 01:57:04,209 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 01:57:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:04,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:57:04,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:04,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:57:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:04,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349476556] [2022-03-20 01:57:04,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104421895] [2022-03-20 01:57:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104421895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:57:04,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:57:04,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 01:57:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540964812] [2022-03-20 01:57:04,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:57:04,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 01:57:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 01:57:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 01:57:04,405 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 01:57:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:04,473 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-20 01:57:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 01:57:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-03-20 01:57:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:04,475 INFO L225 Difference]: With dead ends: 70 [2022-03-20 01:57:04,475 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 01:57:04,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:57:04,477 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:04,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:57:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 01:57:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-20 01:57:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 01:57:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-20 01:57:04,483 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-03-20 01:57:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:04,484 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-20 01:57:04,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 01:57:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-20 01:57:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:57:04,485 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:04,485 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:04,506 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 01:57:04,697 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 01:57:04,698 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-03-20 01:57:04,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:04,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132309191] [2022-03-20 01:57:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:04,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:04,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919307787] [2022-03-20 01:57:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:04,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:04,724 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 01:57:04,758 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 01:57:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 01:57:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:05,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:57:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132309191] [2022-03-20 01:57:06,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919307787] [2022-03-20 01:57:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919307787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:57:06,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:57:06,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-20 01:57:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332277878] [2022-03-20 01:57:06,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:57:06,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 01:57:06,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 01:57:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-20 01:57:06,092 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 01:57:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:07,087 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2022-03-20 01:57:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 01:57:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-20 01:57:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:07,089 INFO L225 Difference]: With dead ends: 103 [2022-03-20 01:57:07,089 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 01:57:07,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-20 01:57:07,090 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:07,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 01:57:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 01:57:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-03-20 01:57:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 01:57:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-03-20 01:57:07,112 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 28 [2022-03-20 01:57:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:07,113 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-03-20 01:57:07,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 01:57:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-03-20 01:57:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 01:57:07,114 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:07,114 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:07,141 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 01:57:07,315 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 01:57:07,315 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-03-20 01:57:07,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:07,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136177829] [2022-03-20 01:57:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:07,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:07,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:07,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090378204] [2022-03-20 01:57:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:07,344 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 01:57:07,345 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 01:57:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 01:57:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 01:57:07,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:57:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 01:57:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136177829] [2022-03-20 01:57:07,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090378204] [2022-03-20 01:57:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090378204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:57:07,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:57:07,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 01:57:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718755304] [2022-03-20 01:57:07,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:57:07,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 01:57:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 01:57:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:57:07,563 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 01:57:09,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:57:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:09,704 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-03-20 01:57:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 01:57:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 01:57:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:09,705 INFO L225 Difference]: With dead ends: 104 [2022-03-20 01:57:09,705 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 01:57:09,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:57:09,706 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:09,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 01:57:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 01:57:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-20 01:57:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 01:57:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-03-20 01:57:09,714 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2022-03-20 01:57:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:09,715 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-03-20 01:57:09,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 01:57:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-03-20 01:57:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 01:57:09,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:09,716 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:09,755 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 01:57:09,916 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 01:57:09,916 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 1 times [2022-03-20 01:57:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:09,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295749949] [2022-03-20 01:57:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:09,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:09,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762846440] [2022-03-20 01:57:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:09,927 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 01:57:09,928 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 01:57:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:57:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 01:57:09,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 01:57:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:57:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 01:57:15,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:15,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295749949] [2022-03-20 01:57:15,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:15,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762846440] [2022-03-20 01:57:15,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762846440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:57:15,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:57:15,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-20 01:57:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254862177] [2022-03-20 01:57:15,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:57:15,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 01:57:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 01:57:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-20 01:57:15,440 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 01:57:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:20,985 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2022-03-20 01:57:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 01:57:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-03-20 01:57:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:20,987 INFO L225 Difference]: With dead ends: 124 [2022-03-20 01:57:20,987 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 01:57:20,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-20 01:57:20,988 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:20,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 336 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 22 Unchecked, 0.9s Time] [2022-03-20 01:57:20,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 01:57:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-03-20 01:57:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 01:57:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-03-20 01:57:21,002 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 38 [2022-03-20 01:57:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:21,002 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-03-20 01:57:21,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 01:57:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-03-20 01:57:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 01:57:21,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:21,004 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:21,030 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 01:57:21,204 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 01:57:21,205 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 2 times [2022-03-20 01:57:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:21,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49521498] [2022-03-20 01:57:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:21,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301629862] [2022-03-20 01:57:21,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:57:21,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:21,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:21,214 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 01:57:21,215 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 01:57:21,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:57:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:57:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:57:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:57:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 01:57:21,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:57:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 01:57:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:57:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49521498] [2022-03-20 01:57:21,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:57:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301629862] [2022-03-20 01:57:21,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301629862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:57:21,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:57:21,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 01:57:21,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955970019] [2022-03-20 01:57:21,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:57:21,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 01:57:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:57:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 01:57:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 01:57:21,534 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 01:57:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:57:21,666 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2022-03-20 01:57:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 01:57:21,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-03-20 01:57:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:57:21,668 INFO L225 Difference]: With dead ends: 300 [2022-03-20 01:57:21,668 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 01:57:21,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 01:57:21,669 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:57:21,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 162 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:57:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 01:57:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2022-03-20 01:57:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 230 states have internal predecessors, (250), 32 states have call successors, (32), 30 states have call predecessors, (32), 29 states have return successors, (30), 22 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 01:57:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-03-20 01:57:21,691 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 58 [2022-03-20 01:57:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:57:21,692 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-03-20 01:57:21,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 01:57:21,692 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-03-20 01:57:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 01:57:21,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:57:21,693 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:57:21,725 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 01:57:21,919 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 01:57:21,920 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:57:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:57:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 2 times [2022-03-20 01:57:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:57:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345635705] [2022-03-20 01:57:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:57:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:57:21,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:57:21,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078869176] [2022-03-20 01:57:21,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:57:21,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:57:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:57:21,929 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 01:57:21,930 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 01:57:21,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:57:21,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:57:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 01:57:21,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:58:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 01:58:56,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:59:02,928 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:59:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 01:59:08,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:59:08,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345635705] [2022-03-20 01:59:08,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:59:08,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078869176] [2022-03-20 01:59:08,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078869176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:59:08,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:59:08,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2022-03-20 01:59:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982309876] [2022-03-20 01:59:08,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:59:08,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 01:59:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:59:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 01:59:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-03-20 01:59:08,354 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 02:00:42,166 WARN L232 SmtUtils]: Spent 1.48m on a formula simplification. DAG size of input: 166 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 02:00:44,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:00:46,196 WARN L534 Checker$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 02:00:48,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:01:26,698 WARN L232 SmtUtils]: Spent 19.55s on a formula simplification. DAG size of input: 172 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 02:01:29,327 WARN L534 Checker$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 02:01:31,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:01:33,333 WARN L534 Checker$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 02:01:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:01:33,496 INFO L93 Difference]: Finished difference Result 409 states and 471 transitions. [2022-03-20 02:01:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 02:01:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 58 [2022-03-20 02:01:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:01:33,499 INFO L225 Difference]: With dead ends: 409 [2022-03-20 02:01:33,499 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 02:01:33,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 133.1s TimeCoverageRelationStatistics Valid=365, Invalid=1438, Unknown=3, NotChecked=0, Total=1806 [2022-03-20 02:01:33,501 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 106 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:01:33,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 481 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 628 Invalid, 6 Unknown, 0 Unchecked, 16.2s Time] [2022-03-20 02:01:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 02:01:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 403. [2022-03-20 02:01:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 321 states have (on average 1.146417445482866) internal successors, (368), 328 states have internal predecessors, (368), 47 states have call successors, (47), 35 states have call predecessors, (47), 34 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 02:01:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 460 transitions. [2022-03-20 02:01:33,544 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 460 transitions. Word has length 58 [2022-03-20 02:01:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:01:33,544 INFO L478 AbstractCegarLoop]: Abstraction has 403 states and 460 transitions. [2022-03-20 02:01:33,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 02:01:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 460 transitions. [2022-03-20 02:01:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 02:01:33,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:01:33,552 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:01:33,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 02:01:33,753 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 02:01:33,753 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:01:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:01:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 86722727, now seen corresponding path program 2 times [2022-03-20 02:01:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:01:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845206544] [2022-03-20 02:01:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:01:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:01:33,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:01:33,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600088159] [2022-03-20 02:01:33,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:01:33,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:01:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:01:33,776 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 02:01:33,781 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 02:01:33,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:01:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:01:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 02:01:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:01:34,430 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:01:39,424 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:01:44,331 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:02:13,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:02:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 02:02:16,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:02:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:02:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845206544] [2022-03-20 02:02:26,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:02:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600088159] [2022-03-20 02:02:26,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600088159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:02:26,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:02:26,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 02:02:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531672350] [2022-03-20 02:02:26,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:02:26,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 02:02:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:02:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 02:02:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=765, Unknown=5, NotChecked=0, Total=930 [2022-03-20 02:02:26,778 INFO L87 Difference]: Start difference. First operand 403 states and 460 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 02:02:29,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:31,148 WARN L534 Checker$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 02:02:33,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:37,591 WARN L534 Checker$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 02:02:40,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:42,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:44,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:46,225 WARN L534 Checker$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 02:02:48,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:02:50,259 WARN L534 Checker$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 02:02:52,277 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 02:02:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:02:52,492 INFO L93 Difference]: Finished difference Result 412 states and 468 transitions. [2022-03-20 02:02:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 02:02:52,493 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 68 [2022-03-20 02:02:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:02:52,495 INFO L225 Difference]: With dead ends: 412 [2022-03-20 02:02:52,495 INFO L226 Difference]: Without dead ends: 410 [2022-03-20 02:02:52,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=184, Invalid=1001, Unknown=5, NotChecked=0, Total=1190 [2022-03-20 02:02:52,496 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 14 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:02:52,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 407 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 434 Invalid, 9 Unknown, 152 Unchecked, 23.3s Time] [2022-03-20 02:02:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-20 02:02:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 407. [2022-03-20 02:02:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 324 states have (on average 1.1419753086419753) internal successors, (370), 331 states have internal predecessors, (370), 47 states have call successors, (47), 36 states have call predecessors, (47), 35 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 02:02:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 462 transitions. [2022-03-20 02:02:52,519 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 462 transitions. Word has length 68 [2022-03-20 02:02:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:02:52,520 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 462 transitions. [2022-03-20 02:02:52,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 02:02:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 462 transitions. [2022-03-20 02:02:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 02:02:52,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:02:52,521 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:02:52,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 02:02:52,723 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 02:02:52,724 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:02:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:02:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash 518514370, now seen corresponding path program 3 times [2022-03-20 02:02:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:02:52,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144395011] [2022-03-20 02:02:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:02:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:02:52,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:02:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222974084] [2022-03-20 02:02:52,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:02:52,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:02:52,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:02:52,739 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 02:02:52,740 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 02:02:52,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 02:02:52,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:02:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 02:02:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:02:54,604 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:02:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 02:02:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:03:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 98 proven. 32 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-20 02:03:02,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:03:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144395011] [2022-03-20 02:03:02,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:03:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222974084] [2022-03-20 02:03:02,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222974084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:03:02,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:03:02,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 02:03:02,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133824663] [2022-03-20 02:03:02,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:03:02,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 02:03:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:03:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 02:03:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=394, Unknown=1, NotChecked=0, Total=506 [2022-03-20 02:03:02,358 INFO L87 Difference]: Start difference. First operand 407 states and 462 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 02:03:04,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:03:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:03:08,102 INFO L93 Difference]: Finished difference Result 462 states and 518 transitions. [2022-03-20 02:03:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:03:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 78 [2022-03-20 02:03:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:03:08,104 INFO L225 Difference]: With dead ends: 462 [2022-03-20 02:03:08,104 INFO L226 Difference]: Without dead ends: 460 [2022-03-20 02:03:08,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=180, Invalid=631, Unknown=1, NotChecked=0, Total=812 [2022-03-20 02:03:08,105 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:03:08,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 313 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 1 Unchecked, 3.3s Time] [2022-03-20 02:03:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-20 02:03:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 215. [2022-03-20 02:03:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 168 states have (on average 1.130952380952381) internal successors, (190), 170 states have internal predecessors, (190), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 02:03:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 236 transitions. [2022-03-20 02:03:08,127 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 236 transitions. Word has length 78 [2022-03-20 02:03:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:03:08,127 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 236 transitions. [2022-03-20 02:03:08,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 02:03:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 236 transitions. [2022-03-20 02:03:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 02:03:08,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:03:08,128 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:03:08,160 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 02:03:08,344 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 02:03:08,344 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:03:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:03:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash -788544728, now seen corresponding path program 3 times [2022-03-20 02:03:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:03:08,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180436752] [2022-03-20 02:03:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:03:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:03:08,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:03:08,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514034012] [2022-03-20 02:03:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:03:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:03:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:03:08,352 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 02:03:08,353 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 02:03:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 02:03:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:03:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 02:03:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:03:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:03:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:03:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 02:03:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:03:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180436752] [2022-03-20 02:03:09,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:03:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514034012] [2022-03-20 02:03:09,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514034012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:03:09,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:03:09,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 02:03:09,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925112946] [2022-03-20 02:03:09,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:03:09,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 02:03:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:03:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 02:03:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 02:03:09,107 INFO L87 Difference]: Start difference. First operand 215 states and 236 transitions. Second operand has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-20 02:03:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:03:09,512 INFO L93 Difference]: Finished difference Result 435 states and 495 transitions. [2022-03-20 02:03:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 02:03:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 118 [2022-03-20 02:03:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:03:09,515 INFO L225 Difference]: With dead ends: 435 [2022-03-20 02:03:09,515 INFO L226 Difference]: Without dead ends: 428 [2022-03-20 02:03:09,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 02:03:09,516 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 263 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:03:09,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 315 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:03:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-20 02:03:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 410. [2022-03-20 02:03:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 325 states have (on average 1.156923076923077) internal successors, (376), 326 states have internal predecessors, (376), 43 states have call successors, (43), 42 states have call predecessors, (43), 41 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 02:03:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 460 transitions. [2022-03-20 02:03:09,561 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 460 transitions. Word has length 118 [2022-03-20 02:03:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:03:09,561 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 460 transitions. [2022-03-20 02:03:09,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-20 02:03:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 460 transitions. [2022-03-20 02:03:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 02:03:09,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:03:09,567 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:03:09,598 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 02:03:09,783 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 02:03:09,783 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:03:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:03:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash -786757268, now seen corresponding path program 3 times [2022-03-20 02:03:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:03:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039727859] [2022-03-20 02:03:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:03:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:03:09,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:03:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845174098] [2022-03-20 02:03:09,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 02:03:09,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:03:09,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:03:09,802 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 02:03:09,803 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 02:03:10,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 02:03:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:03:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 02:03:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:03:13,406 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 02:03:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 46 proven. 301 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 02:03:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:03:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:03:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039727859] [2022-03-20 02:03:20,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:03:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845174098] [2022-03-20 02:03:20,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845174098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:03:20,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:03:20,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-20 02:03:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116760631] [2022-03-20 02:03:20,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 02:03:20,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 02:03:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:03:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 02:03:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=1936, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 02:03:20,708 INFO L87 Difference]: Start difference. First operand 410 states and 460 transitions. Second operand has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 02:03:22,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:03:40,801 WARN L534 Checker$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 02:03:47,590 WARN L232 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 72 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 02:04:04,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 02:04:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:04:47,479 INFO L93 Difference]: Finished difference Result 412 states and 461 transitions. [2022-03-20 02:04:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 02:04:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 118 [2022-03-20 02:04:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:04:47,481 INFO L225 Difference]: With dead ends: 412 [2022-03-20 02:04:47,482 INFO L226 Difference]: Without dead ends: 410 [2022-03-20 02:04:47,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 137 SyntacticMatches, 15 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=1656, Invalid=4984, Unknown=2, NotChecked=0, Total=6642 [2022-03-20 02:04:47,484 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:04:47,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 227 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 202 Invalid, 1 Unknown, 89 Unchecked, 11.5s Time] [2022-03-20 02:04:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-20 02:04:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2022-03-20 02:04:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 325 states have (on average 1.1538461538461537) internal successors, (375), 326 states have internal predecessors, (375), 43 states have call successors, (43), 42 states have call predecessors, (43), 41 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 02:04:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 459 transitions. [2022-03-20 02:04:47,541 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 459 transitions. Word has length 118 [2022-03-20 02:04:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:04:47,542 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 459 transitions. [2022-03-20 02:04:47,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 02:04:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 459 transitions. [2022-03-20 02:04:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 02:04:47,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:04:47,544 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:04:47,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 02:04:47,759 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 02:04:47,759 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:04:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:04:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2145405639, now seen corresponding path program 4 times [2022-03-20 02:04:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:04:47,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716160395] [2022-03-20 02:04:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:04:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:04:47,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:04:47,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958271393] [2022-03-20 02:04:47,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 02:04:47,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:04:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:04:47,769 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 02:04:47,770 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 02:04:47,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 02:04:47,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:04:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 02:04:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates...