/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:32:18,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:32:18,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:32:18,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:32:18,893 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 [2022-03-19 23:32:18,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:32:18,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:32:18,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:32:18,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:32:18,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:32:18,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:32:18,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:32:18,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:32:18,919 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:32:18,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:32:18,920 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:32:18,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:32:18,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:32:18,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:32:18,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:32:18,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:32:18,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:32:18,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:32:18,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:32:18,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:32:18,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:32:18,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:32:18,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:32:18,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:32:18,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:32:18,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:32:18,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:32:19,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:32:19,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:32:19,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:32:19,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:32:19,105 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:32:19,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-19 23:32:19,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b9594a0/14b910d7da754832b66189f398a12e77/FLAGb346d4526 [2022-03-19 23:32:19,482 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:32:19,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-19 23:32:19,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b9594a0/14b910d7da754832b66189f398a12e77/FLAGb346d4526 [2022-03-19 23:32:19,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b9594a0/14b910d7da754832b66189f398a12e77 [2022-03-19 23:32:19,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:32:19,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:32:19,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:32:19,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:32:19,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:32:19,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:32:19" (1/1) ... [2022-03-19 23:32:19,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7fc5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:19, skipping insertion in model container [2022-03-19 23:32:19,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:32:19" (1/1) ... [2022-03-19 23:32:19,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:32:19,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:32:20,091 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/egcd2-ll.c[490,503] [2022-03-19 23:32:20,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:32:20,109 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:32:20,118 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/egcd2-ll.c[490,503] [2022-03-19 23:32:20,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:32:20,132 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:32:20,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20 WrapperNode [2022-03-19 23:32:20,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:32:20,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:32:20,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:32:20,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:32:20,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:32:20,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:32:20,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:32:20,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:32:20,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (1/1) ... [2022-03-19 23:32:20,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:32:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:20,189 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) [2022-03-19 23:32:20,203 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 [2022-03-19 23:32:20,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:32:20,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:32:20,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:32:20,225 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:32:20,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:32:20,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 23:32:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:32:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:32:20,274 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:32:20,276 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:32:20,397 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:32:20,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:32:20,403 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:32:20,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:32:20 BoogieIcfgContainer [2022-03-19 23:32:20,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:32:20,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:32:20,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:32:20,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:32:20,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:32:19" (1/3) ... [2022-03-19 23:32:20,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a91a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:32:20, skipping insertion in model container [2022-03-19 23:32:20,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:32:20" (2/3) ... [2022-03-19 23:32:20,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a91a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:32:20, skipping insertion in model container [2022-03-19 23:32:20,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:32:20" (3/3) ... [2022-03-19 23:32:20,410 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-03-19 23:32:20,414 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:32:20,414 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:32:20,462 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:32:20,467 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 [2022-03-19 23:32:20,467 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:32:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 23:32:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:32:20,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:20,483 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:20,484 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2022-03-19 23:32:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:20,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176355090] [2022-03-19 23:32:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:32:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 23:32:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 23:32:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:32:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 23:32:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176355090] [2022-03-19 23:32:20,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176355090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:32:20,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:32:20,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:32:20,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033599206] [2022-03-19 23:32:20,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:32:20,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:32:20,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:32:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:32:20,757 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:32:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:20,840 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-03-19 23:32:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:32:20,843 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-19 23:32:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:20,848 INFO L225 Difference]: With dead ends: 67 [2022-03-19 23:32:20,848 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 23:32:20,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:32:20,853 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:20,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:32:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 23:32:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 23:32:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:32:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 23:32:20,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-19 23:32:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:20,886 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 23:32:20,886 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:32:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 23:32:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 23:32:20,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:20,888 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:20,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:32:20,889 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2022-03-19 23:32:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:20,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045646644] [2022-03-19 23:32:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:20,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285940386] [2022-03-19 23:32:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:20,916 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) [2022-03-19 23:32:20,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:32:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:32:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 23:32:21,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 23:32:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045646644] [2022-03-19 23:32:21,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285940386] [2022-03-19 23:32:21,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285940386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:21,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:21,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 23:32:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505779446] [2022-03-19 23:32:21,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:21,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:32:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:32:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:32:21,289 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:32:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:21,372 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-19 23:32:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:32:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 23:32:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:21,374 INFO L225 Difference]: With dead ends: 49 [2022-03-19 23:32:21,374 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 23:32:21,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:32:21,375 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:21,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:32:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 23:32:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-19 23:32:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:32:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-19 23:32:21,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-03-19 23:32:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:21,384 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-19 23:32:21,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:32:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-19 23:32:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 23:32:21,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:21,385 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:21,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 23:32:21,605 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 [2022-03-19 23:32:21,605 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2022-03-19 23:32:21,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:21,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847330421] [2022-03-19 23:32:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:21,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:21,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:21,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773090674] [2022-03-19 23:32:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:21,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:21,636 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) [2022-03-19 23:32:21,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:32:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:32:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 23:32:21,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 23:32:21,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847330421] [2022-03-19 23:32:21,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773090674] [2022-03-19 23:32:21,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773090674] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:21,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:32:21,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 23:32:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414879892] [2022-03-19 23:32:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:32:21,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:32:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:32:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:32:21,927 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 23:32:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:21,970 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-03-19 23:32:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:32:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-19 23:32:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:21,973 INFO L225 Difference]: With dead ends: 40 [2022-03-19 23:32:21,973 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 23:32:21,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:32:21,977 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:21,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:32:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 23:32:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 23:32:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:32:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-19 23:32:21,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 34 [2022-03-19 23:32:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:21,993 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-19 23:32:21,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 23:32:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-19 23:32:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:32:21,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:21,994 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:22,194 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 [2022-03-19 23:32:22,195 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2022-03-19 23:32:22,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118751062] [2022-03-19 23:32:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:22,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205291138] [2022-03-19 23:32:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:22,212 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) [2022-03-19 23:32:22,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:32:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:32:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 23:32:22,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:32:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118751062] [2022-03-19 23:32:22,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205291138] [2022-03-19 23:32:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205291138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:32:22,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:32:22,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:32:22,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369930639] [2022-03-19 23:32:22,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:32:22,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:32:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:32:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:32:22,365 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 23:32:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:22,391 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-03-19 23:32:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:32:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-19 23:32:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:22,392 INFO L225 Difference]: With dead ends: 51 [2022-03-19 23:32:22,392 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 23:32:22,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:32:22,393 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:22,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:32:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 23:32:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-19 23:32:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 23:32:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-19 23:32:22,400 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 39 [2022-03-19 23:32:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:22,401 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-19 23:32:22,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 23:32:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-19 23:32:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 23:32:22,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:22,402 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:22,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:22,619 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 [2022-03-19 23:32:22,619 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2022-03-19 23:32:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969412817] [2022-03-19 23:32:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:22,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286301513] [2022-03-19 23:32:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:22,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:22,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:22,631 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) [2022-03-19 23:32:22,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:32:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:32:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 23:32:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:22,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969412817] [2022-03-19 23:32:22,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286301513] [2022-03-19 23:32:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286301513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:22,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:32:22,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 23:32:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362480390] [2022-03-19 23:32:22,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:22,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:32:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:32:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:32:22,857 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 23:32:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:22,936 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-03-19 23:32:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:32:22,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 23:32:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:22,938 INFO L225 Difference]: With dead ends: 55 [2022-03-19 23:32:22,938 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 23:32:22,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:32:22,939 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:22,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 176 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:32:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 23:32:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-19 23:32:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 23:32:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-19 23:32:22,948 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 44 [2022-03-19 23:32:22,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:22,948 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-19 23:32:22,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 23:32:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-19 23:32:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:32:22,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:22,950 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:22,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:23,167 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 [2022-03-19 23:32:23,168 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2022-03-19 23:32:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990424117] [2022-03-19 23:32:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:23,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:23,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899579001] [2022-03-19 23:32:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:23,189 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) [2022-03-19 23:32:23,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:32:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:32:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:32:23,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990424117] [2022-03-19 23:32:23,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899579001] [2022-03-19 23:32:23,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899579001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:23,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:32:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 23:32:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542328930] [2022-03-19 23:32:23,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:23,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:32:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:32:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:32:23,508 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 23:32:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:23,589 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-03-19 23:32:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:32:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-19 23:32:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:23,591 INFO L225 Difference]: With dead ends: 59 [2022-03-19 23:32:23,591 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 23:32:23,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:32:23,591 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:23,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:32:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 23:32:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-19 23:32:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 23:32:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-19 23:32:23,598 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2022-03-19 23:32:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:23,598 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-19 23:32:23,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 23:32:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-19 23:32:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:32:23,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:23,599 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:23,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:23,816 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 [2022-03-19 23:32:23,817 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2022-03-19 23:32:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284588530] [2022-03-19 23:32:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:23,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:23,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913689126] [2022-03-19 23:32:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:23,828 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) [2022-03-19 23:32:23,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:32:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:32:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 23:32:23,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 23:32:24,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284588530] [2022-03-19 23:32:24,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913689126] [2022-03-19 23:32:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913689126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:24,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:24,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 23:32:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968201072] [2022-03-19 23:32:24,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:24,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:32:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:32:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:32:24,072 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 23:32:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:24,181 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-03-19 23:32:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:32:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-03-19 23:32:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:24,183 INFO L225 Difference]: With dead ends: 103 [2022-03-19 23:32:24,183 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 23:32:24,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:32:24,184 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:24,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 367 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:32:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 23:32:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-03-19 23:32:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 23:32:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2022-03-19 23:32:24,195 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 58 [2022-03-19 23:32:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:24,195 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2022-03-19 23:32:24,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 23:32:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2022-03-19 23:32:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:32:24,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:24,196 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:24,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:24,413 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 [2022-03-19 23:32:24,413 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2022-03-19 23:32:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982759178] [2022-03-19 23:32:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:24,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:24,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487777365] [2022-03-19 23:32:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:24,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:24,423 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) [2022-03-19 23:32:24,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:32:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:32:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 23:32:24,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 23:32:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:24,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982759178] [2022-03-19 23:32:24,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:24,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487777365] [2022-03-19 23:32:24,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487777365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:24,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:24,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 23:32:24,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622910251] [2022-03-19 23:32:24,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:24,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 23:32:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 23:32:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:32:24,835 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 23:32:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:25,081 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2022-03-19 23:32:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:32:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 64 [2022-03-19 23:32:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:25,083 INFO L225 Difference]: With dead ends: 129 [2022-03-19 23:32:25,083 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 23:32:25,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:32:25,084 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:25,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 241 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:32:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 23:32:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2022-03-19 23:32:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 23:32:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-03-19 23:32:25,097 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 64 [2022-03-19 23:32:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:25,098 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-03-19 23:32:25,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 23:32:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-03-19 23:32:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:32:25,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:25,099 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:25,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:25,316 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 [2022-03-19 23:32:25,316 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 2 times [2022-03-19 23:32:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679232458] [2022-03-19 23:32:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:25,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:25,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113561711] [2022-03-19 23:32:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:32:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:25,343 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) [2022-03-19 23:32:25,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:32:25,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:32:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:32:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-19 23:32:25,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 23:32:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679232458] [2022-03-19 23:32:26,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113561711] [2022-03-19 23:32:26,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113561711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:26,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:26,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-19 23:32:26,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254589268] [2022-03-19 23:32:26,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:26,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:32:26,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:32:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:32:26,031 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 23:32:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:28,841 INFO L93 Difference]: Finished difference Result 229 states and 335 transitions. [2022-03-19 23:32:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:32:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 69 [2022-03-19 23:32:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:28,844 INFO L225 Difference]: With dead ends: 229 [2022-03-19 23:32:28,844 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 23:32:28,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:32:28,847 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 91 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:28,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 433 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 23:32:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 23:32:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2022-03-19 23:32:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 100 states have internal predecessors, (118), 69 states have call successors, (69), 12 states have call predecessors, (69), 11 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-19 23:32:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 254 transitions. [2022-03-19 23:32:28,889 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 254 transitions. Word has length 69 [2022-03-19 23:32:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:28,889 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 254 transitions. [2022-03-19 23:32:28,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 23:32:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 254 transitions. [2022-03-19 23:32:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 23:32:28,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:28,892 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:28,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:29,107 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 [2022-03-19 23:32:29,108 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 3 times [2022-03-19 23:32:29,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:29,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440576669] [2022-03-19 23:32:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:29,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:29,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553381109] [2022-03-19 23:32:29,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:32:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:29,117 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) [2022-03-19 23:32:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:32:29,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:32:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:29,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:32:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:32:29,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440576669] [2022-03-19 23:32:29,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553381109] [2022-03-19 23:32:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553381109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:29,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:32:29,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 23:32:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954514511] [2022-03-19 23:32:29,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:29,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:32:29,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:32:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:32:29,615 INFO L87 Difference]: Start difference. First operand 178 states and 254 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 23:32:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:29,949 INFO L93 Difference]: Finished difference Result 210 states and 293 transitions. [2022-03-19 23:32:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:32:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-19 23:32:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:29,952 INFO L225 Difference]: With dead ends: 210 [2022-03-19 23:32:29,952 INFO L226 Difference]: Without dead ends: 208 [2022-03-19 23:32:29,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:32:29,953 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:29,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 252 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:32:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-19 23:32:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2022-03-19 23:32:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 116 states have internal predecessors, (136), 77 states have call successors, (77), 15 states have call predecessors, (77), 14 states have return successors, (75), 73 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-19 23:32:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 288 transitions. [2022-03-19 23:32:29,982 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 288 transitions. Word has length 74 [2022-03-19 23:32:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:29,982 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 288 transitions. [2022-03-19 23:32:29,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 23:32:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 288 transitions. [2022-03-19 23:32:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 23:32:29,983 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:29,983 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:30,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:30,200 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 [2022-03-19 23:32:30,201 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2022-03-19 23:32:30,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:30,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650687041] [2022-03-19 23:32:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:30,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:30,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262917147] [2022-03-19 23:32:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:30,217 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) [2022-03-19 23:32:30,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:32:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 23:32:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-19 23:32:30,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-19 23:32:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650687041] [2022-03-19 23:32:31,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262917147] [2022-03-19 23:32:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262917147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:31,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:31,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-19 23:32:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937786759] [2022-03-19 23:32:31,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:31,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:32:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:32:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:32:31,149 INFO L87 Difference]: Start difference. First operand 205 states and 288 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 23:32:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:33,192 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2022-03-19 23:32:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:32:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 80 [2022-03-19 23:32:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:33,194 INFO L225 Difference]: With dead ends: 307 [2022-03-19 23:32:33,194 INFO L226 Difference]: Without dead ends: 298 [2022-03-19 23:32:33,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:32:33,195 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:33,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 442 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:32:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-19 23:32:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-03-19 23:32:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 167 states have internal predecessors, (198), 113 states have call successors, (113), 18 states have call predecessors, (113), 17 states have return successors, (111), 109 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-19 23:32:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 422 transitions. [2022-03-19 23:32:33,236 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 422 transitions. Word has length 80 [2022-03-19 23:32:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:33,237 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 422 transitions. [2022-03-19 23:32:33,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 23:32:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 422 transitions. [2022-03-19 23:32:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 23:32:33,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:33,238 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:33,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:33,451 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 [2022-03-19 23:32:33,451 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2022-03-19 23:32:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434095793] [2022-03-19 23:32:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:33,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:32:33,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813965092] [2022-03-19 23:32:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:33,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:33,466 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) [2022-03-19 23:32:33,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:32:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 23:32:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 55 proven. 57 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 23:32:34,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 55 proven. 57 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 23:32:39,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434095793] [2022-03-19 23:32:39,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:32:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813965092] [2022-03-19 23:32:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813965092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:39,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:32:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-03-19 23:32:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509820136] [2022-03-19 23:32:39,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:39,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:32:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:32:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:32:39,192 INFO L87 Difference]: Start difference. First operand 295 states and 422 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-03-19 23:32:47,241 WARN L232 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:32:55,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:06,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:08,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:13,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:15,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:17,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:19,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:21,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:23,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:26,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:28,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:31,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:33,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:35,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:33:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:44,149 INFO L93 Difference]: Finished difference Result 343 states and 495 transitions. [2022-03-19 23:33:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 23:33:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 96 [2022-03-19 23:33:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:44,179 INFO L225 Difference]: With dead ends: 343 [2022-03-19 23:33:44,179 INFO L226 Difference]: Without dead ends: 341 [2022-03-19 23:33:44,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=224, Invalid=700, Unknown=6, NotChecked=0, Total=930 [2022-03-19 23:33:44,183 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 126 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:44,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 315 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 422 Invalid, 11 Unknown, 0 Unchecked, 34.3s Time] [2022-03-19 23:33:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-19 23:33:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2022-03-19 23:33:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 189 states have internal predecessors, (222), 134 states have call successors, (134), 19 states have call predecessors, (134), 18 states have return successors, (132), 127 states have call predecessors, (132), 132 states have call successors, (132) [2022-03-19 23:33:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 488 transitions. [2022-03-19 23:33:44,248 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 488 transitions. Word has length 96 [2022-03-19 23:33:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:44,249 INFO L478 AbstractCegarLoop]: Abstraction has 336 states and 488 transitions. [2022-03-19 23:33:44,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-03-19 23:33:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 488 transitions. [2022-03-19 23:33:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 23:33:44,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:44,250 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:44,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:44,463 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 [2022-03-19 23:33:44,463 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -452504748, now seen corresponding path program 4 times [2022-03-19 23:33:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:44,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552198331] [2022-03-19 23:33:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:44,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:33:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948994831] [2022-03-19 23:33:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:33:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:44,474 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) [2022-03-19 23:33:44,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:33:44,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:33:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:33:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 23:33:44,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:33:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552198331] [2022-03-19 23:33:44,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:33:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948994831] [2022-03-19 23:33:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948994831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:33:44,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:33:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:33:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680880634] [2022-03-19 23:33:44,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:33:44,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:33:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:33:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:33:44,686 INFO L87 Difference]: Start difference. First operand 336 states and 488 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 23:33:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:44,775 INFO L93 Difference]: Finished difference Result 410 states and 590 transitions. [2022-03-19 23:33:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:33:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2022-03-19 23:33:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:44,777 INFO L225 Difference]: With dead ends: 410 [2022-03-19 23:33:44,777 INFO L226 Difference]: Without dead ends: 239 [2022-03-19 23:33:44,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:33:44,779 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:44,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:33:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-19 23:33:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 215. [2022-03-19 23:33:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 23:33:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 289 transitions. [2022-03-19 23:33:44,822 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 289 transitions. Word has length 99 [2022-03-19 23:33:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:44,822 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 289 transitions. [2022-03-19 23:33:44,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 23:33:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 289 transitions. [2022-03-19 23:33:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 23:33:44,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:44,823 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:44,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 23:33:45,039 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 [2022-03-19 23:33:45,039 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 2 times [2022-03-19 23:33:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:45,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235287749] [2022-03-19 23:33:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:45,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:33:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900857940] [2022-03-19 23:33:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:33:45,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:45,051 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) [2022-03-19 23:33:45,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 23:33:45,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:33:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 23:33:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-19 23:33:45,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:46,159 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 120 proven. 32 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-19 23:33:46,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235287749] [2022-03-19 23:33:46,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:33:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900857940] [2022-03-19 23:33:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900857940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:46,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:33:46,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-19 23:33:46,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708309058] [2022-03-19 23:33:46,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:46,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 23:33:46,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 23:33:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:33:46,370 INFO L87 Difference]: Start difference. First operand 215 states and 289 transitions. Second operand has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2022-03-19 23:33:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:47,725 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2022-03-19 23:33:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:33:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) Word has length 116 [2022-03-19 23:33:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:47,741 INFO L225 Difference]: With dead ends: 246 [2022-03-19 23:33:47,741 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 23:33:47,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-03-19 23:33:47,746 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:47,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 568 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:33:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 23:33:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2022-03-19 23:33:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 126 states have (on average 1.126984126984127) internal successors, (142), 128 states have internal predecessors, (142), 79 states have call successors, (79), 22 states have call predecessors, (79), 21 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 23:33:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2022-03-19 23:33:47,816 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 116 [2022-03-19 23:33:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:47,818 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2022-03-19 23:33:47,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2022-03-19 23:33:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2022-03-19 23:33:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 23:33:47,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:47,832 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:47,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:48,032 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 [2022-03-19 23:33:48,032 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:48,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 2 times [2022-03-19 23:33:48,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:48,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774698992] [2022-03-19 23:33:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:48,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:33:48,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253871363] [2022-03-19 23:33:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:33:48,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:48,048 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) [2022-03-19 23:33:48,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 23:33:48,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:33:48,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 23:33:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:49,136 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:49,138 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:49,166 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:49,168 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:49,171 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:33:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 133 proven. 86 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 23:33:49,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2022-03-19 23:33:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774698992] [2022-03-19 23:33:51,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:33:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253871363] [2022-03-19 23:33:51,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253871363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:51,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:33:51,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-19 23:33:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988786786] [2022-03-19 23:33:51,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:51,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 23:33:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 23:33:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-19 23:33:51,451 INFO L87 Difference]: Start difference. First operand 227 states and 298 transitions. Second operand has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-19 23:34:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:03,696 INFO L93 Difference]: Finished difference Result 278 states and 365 transitions. [2022-03-19 23:34:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:34:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 127 [2022-03-19 23:34:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:03,698 INFO L225 Difference]: With dead ends: 278 [2022-03-19 23:34:03,698 INFO L226 Difference]: Without dead ends: 270 [2022-03-19 23:34:03,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:34:03,699 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:03,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 579 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-19 23:34:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-19 23:34:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2022-03-19 23:34:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 133 states have internal predecessors, (144), 78 states have call successors, (78), 25 states have call predecessors, (78), 24 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 23:34:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-03-19 23:34:03,756 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 127 [2022-03-19 23:34:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:03,758 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-03-19 23:34:03,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-19 23:34:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-03-19 23:34:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-19 23:34:03,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:03,764 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:03,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:03,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:03,979 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash -931001923, now seen corresponding path program 3 times [2022-03-19 23:34:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:03,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602933950] [2022-03-19 23:34:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:03,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:34:03,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76152221] [2022-03-19 23:34:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:34:03,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:03,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:03,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 23:34:05,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:34:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:34:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 168 proven. 35 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2022-03-19 23:34:11,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:12,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602933950] [2022-03-19 23:34:12,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:34:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76152221] [2022-03-19 23:34:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76152221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:12,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:34:12,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 23:34:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867218266] [2022-03-19 23:34:12,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:12,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 23:34:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 23:34:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-19 23:34:12,434 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 23:34:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:19,734 INFO L93 Difference]: Finished difference Result 331 states and 450 transitions. [2022-03-19 23:34:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:34:19,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 168 [2022-03-19 23:34:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:19,738 INFO L225 Difference]: With dead ends: 331 [2022-03-19 23:34:19,738 INFO L226 Difference]: Without dead ends: 329 [2022-03-19 23:34:19,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:34:19,739 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:19,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 327 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 574 Invalid, 0 Unknown, 76 Unchecked, 2.3s Time] [2022-03-19 23:34:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-19 23:34:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 323. [2022-03-19 23:34:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 172 states have internal predecessors, (191), 126 states have call successors, (126), 27 states have call predecessors, (126), 26 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 23:34:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2022-03-19 23:34:19,841 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 168 [2022-03-19 23:34:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:19,841 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2022-03-19 23:34:19,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 23:34:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2022-03-19 23:34:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-19 23:34:19,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:19,843 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:19,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:20,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 23:34:20,049 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -700015396, now seen corresponding path program 4 times [2022-03-19 23:34:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309183405] [2022-03-19 23:34:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:20,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:34:20,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633555100] [2022-03-19 23:34:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:34:20,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:20,071 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:20,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 23:34:20,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:34:20,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 23:34:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:22,760 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:34:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 303 proven. 264 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-03-19 23:34:43,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:01,795 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:35:01,800 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:35:13,689 WARN L232 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 23 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 23:35:45,056 WARN L232 SmtUtils]: Spent 9.54s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:36:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 356 proven. 91 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-03-19 23:36:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:36:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309183405] [2022-03-19 23:36:19,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:36:19,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633555100] [2022-03-19 23:36:19,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633555100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:36:19,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:36:19,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-19 23:36:19,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686280151] [2022-03-19 23:36:19,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:36:19,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 23:36:19,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:36:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 23:36:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=855, Unknown=9, NotChecked=0, Total=1122 [2022-03-19 23:36:19,415 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 28 states have internal predecessors, (63), 17 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) [2022-03-19 23:36:20,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:37:02,476 WARN L232 SmtUtils]: Spent 28.34s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:37:23,065 WARN L232 SmtUtils]: Spent 15.43s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:38:19,925 WARN L232 SmtUtils]: Spent 42.18s on a formula simplification. DAG size of input: 188 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:38:51,704 WARN L232 SmtUtils]: Spent 27.34s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:40:23,351 WARN L232 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 175 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:44:04,411 WARN L232 SmtUtils]: Spent 2.42m on a formula simplification. DAG size of input: 186 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:44:06,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:08,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:10,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:12,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:14,476 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse22 (* c_main_~q~0 c_main_~x~0)) (.cse23 (* c_main_~s~0 c_main_~y~0))) (let ((.cse27 (= (+ .cse22 .cse23 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (.cse46 (* c_main_~b~0 2)) (.cse24 (* c_main_~q~0 c_main_~x~0 c_main_~k~0))) (let ((.cse20 (= c_main_~y~0 0)) (.cse21 (+ .cse24 c_main_~c~0 (* (- 1) c_main_~p~0 c_main_~x~0))) (.cse1 (<= .cse46 c_main_~c~0)) (.cse38 (* (- 1) c_main_~b~0)) (.cse2 (not .cse27)) (.cse7 (not (= c_main_~b~0 (+ .cse22 .cse23)))) (.cse25 (* c_main_~p~0 c_main_~x~0))) (and (let ((.cse8 (+ 2 c_main_~k~0))) (let ((.cse3 (+ c_main_~p~0 (* (- 1) c_main_~q~0 .cse8))) (.cse5 (+ (* (- 1) (* c_main_~s~0 .cse8)) c_main_~r~0))) (let ((.cse4 (* .cse5 c_main_~y~0)) (.cse6 (* .cse3 c_main_~x~0))) (let ((.cse0 (+ .cse4 .cse6))) (or (not (= (+ c_main_~c~0 (* (- 2) c_main_~b~0)) .cse0)) (not .cse1) (= .cse0 0) .cse2 (= (+ (* .cse3 c_main_~xy~0) .cse4 (* c_main_~yy~0 .cse5) .cse6) (+ (* .cse0 c_main_~y~0) .cse4 .cse6)) .cse7 (<= (* c_main_~b~0 3) c_main_~c~0)))))) (let ((.cse26 (* (- 1) c_main_~q~0 c_main_~k~0)) (.cse18 (div .cse21 c_main_~y~0))) (let ((.cse11 (+ c_main_~s~0 (* (- 2) .cse18))) (.cse10 (+ (* (- 2) c_main_~p~0) c_main_~q~0 (* (- 2) .cse26)))) (let ((.cse19 (* c_main_~y~0 .cse18)) (.cse9 (* .cse10 c_main_~x~0)) (.cse12 (* .cse11 c_main_~y~0))) (let ((.cse13 (+ .cse9 .cse12)) (.cse17 (+ c_main_~p~0 .cse26)) (.cse14 (* 2 .cse19)) (.cse15 (* 2 .cse25)) (.cse16 (+ .cse22 .cse23 (* 2 .cse24)))) (or (= (+ .cse9 (* c_main_~xy~0 .cse10) (* c_main_~yy~0 .cse11) .cse12) (+ (* .cse13 c_main_~y~0) .cse9 .cse12)) (<= (+ .cse14 c_main_~c~0 .cse15) .cse16) (not (= (+ (* c_main_~xy~0 .cse17) (* c_main_~yy~0 .cse18) c_main_~c~0) (+ (* .cse17 c_main_~x~0) .cse19 (* c_main_~c~0 c_main_~y~0)))) .cse20 (< c_main_~r~0 (+ (* c_main_~s~0 c_main_~k~0) .cse18)) (not (= (mod .cse21 c_main_~y~0) 0)) (= .cse13 0) (not (= c_main_~b~0 (+ (* (- 2) .cse17 c_main_~x~0) .cse22 (* 2 c_main_~c~0) (* (- 2) c_main_~y~0 .cse18) .cse23))) (not (<= (+ .cse14 .cse15) .cse16))))))) .cse27 (or (not .cse20) (forall ((v_main_~s~0_49 Int)) (let ((.cse32 (* c_main_~p~0 c_main_~x~0)) (.cse33 (* v_main_~s~0_49 c_main_~y~0))) (let ((.cse34 (* 2 .cse33)) (.cse35 (* 2 .cse32)) (.cse31 (* c_main_~q~0 c_main_~x~0 c_main_~k~0))) (let ((.cse30 (* v_main_~s~0_49 c_main_~yy~0)) (.cse29 (* c_main_~xy~0 c_main_~p~0)) (.cse28 (* c_main_~q~0 c_main_~xy~0 c_main_~k~0)) (.cse36 (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0) (* 2 .cse31))) (.cse37 (+ .cse34 .cse35))) (or (= (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) (* 2 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (* .cse28 2) (* 2 (* v_main_~s~0_49 c_main_~y~0 c_main_~y~0))) (+ (* 2 .cse29) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* .cse30 2) (* (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) 2) (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (not (= (+ .cse30 .cse31 c_main_~c~0 .cse29) (+ .cse28 .cse32 .cse33 (* c_main_~c~0 c_main_~y~0)))) (<= (+ .cse34 c_main_~c~0 .cse35) .cse36) (< c_main_~r~0 (+ v_main_~s~0_49 (* c_main_~s~0 c_main_~k~0))) (= .cse36 .cse37) (< .cse36 .cse37)))))) (not (= (+ (div (+ .cse38 .cse22 .cse23) 2) .cse24 c_main_~c~0) .cse25)) (not (= .cse21 0)) (not (= (mod (+ c_main_~b~0 (* c_main_~q~0 2 c_main_~x~0 c_main_~k~0) .cse22 .cse23 (* (- 2) c_main_~p~0 c_main_~x~0)) 2) 0))) (let ((.cse44 (+ c_main_~k~0 1))) (let ((.cse42 (+ (* (- 1) (* c_main_~s~0 .cse44)) c_main_~r~0)) (.cse41 (+ (* (- 1) c_main_~q~0 .cse44) c_main_~p~0))) (let ((.cse40 (* .cse41 c_main_~x~0)) (.cse43 (* .cse42 c_main_~y~0))) (let ((.cse39 (+ .cse40 .cse43))) (or (= .cse39 0) .cse2 .cse7 (= (+ .cse40 (* .cse41 c_main_~xy~0) (* c_main_~yy~0 .cse42) .cse43) (+ (* .cse39 c_main_~y~0) .cse40 .cse43)) .cse1 (not (= .cse39 (+ .cse38 c_main_~c~0))) (not (<= c_main_~b~0 c_main_~c~0))))))) (let ((.cse53 (+ c_main_~p~0 (* (- 2) c_main_~q~0))) (.cse54 (+ (* (- 2) c_main_~s~0) c_main_~r~0))) (let ((.cse51 (* .cse54 c_main_~y~0)) (.cse52 (* .cse53 c_main_~x~0)) (.cse47 (* c_main_~r~0 c_main_~y~0))) (let ((.cse48 (* .cse22 2)) (.cse49 (* 2 .cse23)) (.cse50 (+ .cse25 .cse47)) (.cse45 (+ .cse51 .cse52))) (or (= .cse45 0) .cse2 (not (= (+ .cse46 (* (- 2) c_main_~q~0 c_main_~x~0) .cse25 .cse47 (* (- 2) c_main_~s~0 c_main_~y~0)) c_main_~a~0)) .cse7 (not (<= (+ .cse48 .cse49) .cse50)) (<= (+ .cse48 c_main_~b~0 .cse49) .cse50) (= (+ .cse51 (* .cse45 c_main_~y~0) .cse52) (+ .cse51 (* c_main_~xy~0 .cse53) .cse52 (* .cse54 c_main_~yy~0))))))))))) is different from true [2022-03-19 23:44:16,529 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 [] [2022-03-19 23:44:18,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:27,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:44:50,310 WARN L232 SmtUtils]: Spent 17.35s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:44:53,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:45:07,514 WARN L232 SmtUtils]: Spent 9.35s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:45:10,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []