/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 17:10:33,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 17:10:33,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 17:10:33,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 17:10:33,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 17:10:33,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 17:10:33,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 17:10:33,159 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 [2022-02-14 17:10:33,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 17:10:33,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 17:10:33,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 17:10:33,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 17:10:33,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 17:10:33,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 17:10:33,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 17:10:33,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 17:10:33,183 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 17:10:33,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 17:10:33,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 17:10:33,185 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 17:10:33,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 17:10:33,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 17:10:33,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 17:10:33,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 17:10:33,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 17:10:33,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 17:10:33,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 17:10:33,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 17:10:33,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 17:10:33,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 17:10:33,396 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 17:10:33,398 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 17:10:33,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-02-14 17:10:33,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f91c694a/376d1c11854044cf898625239c296e50/FLAGbffcc6647 [2022-02-14 17:10:33,807 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 17:10:33,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-02-14 17:10:33,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f91c694a/376d1c11854044cf898625239c296e50/FLAGbffcc6647 [2022-02-14 17:10:33,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f91c694a/376d1c11854044cf898625239c296e50 [2022-02-14 17:10:33,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 17:10:33,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 17:10:33,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 17:10:33,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 17:10:33,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 17:10:33,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 05:10:33" (1/1) ... [2022-02-14 17:10:33,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb1a5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:33, skipping insertion in model container [2022-02-14 17:10:33,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 05:10:33" (1/1) ... [2022-02-14 17:10:33,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 17:10:33,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 17:10:33,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-02-14 17:10:33,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 17:10:34,002 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 17:10:34,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-02-14 17:10:34,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 17:10:34,032 INFO L208 MainTranslator]: Completed translation [2022-02-14 17:10:34,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34 WrapperNode [2022-02-14 17:10:34,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 17:10:34,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 17:10:34,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 17:10:34,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 17:10:34,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 17:10:34,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 17:10:34,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 17:10:34,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 17:10:34,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (1/1) ... [2022-02-14 17:10:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 17:10:34,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:10:34,106 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) [2022-02-14 17:10:34,115 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 [2022-02-14 17:10:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 17:10:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 17:10:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 17:10:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 17:10:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 17:10:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 17:10:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 17:10:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 17:10:34,187 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 17:10:34,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 17:10:34,307 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 17:10:34,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 17:10:34,311 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 17:10:34,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 05:10:34 BoogieIcfgContainer [2022-02-14 17:10:34,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 17:10:34,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 17:10:34,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 17:10:34,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 17:10:34,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 05:10:33" (1/3) ... [2022-02-14 17:10:34,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f2c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 05:10:34, skipping insertion in model container [2022-02-14 17:10:34,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:10:34" (2/3) ... [2022-02-14 17:10:34,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f2c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 05:10:34, skipping insertion in model container [2022-02-14 17:10:34,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 05:10:34" (3/3) ... [2022-02-14 17:10:34,318 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.c [2022-02-14 17:10:34,321 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 17:10:34,321 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 17:10:34,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 17:10:34,368 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 17:10:34,368 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 17:10:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-02-14 17:10:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 17:10:34,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:34,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:34,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2024343623, now seen corresponding path program 1 times [2022-02-14 17:10:34,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:34,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001362052] [2022-02-14 17:10:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:34,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:10:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:10:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:34,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:34,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001362052] [2022-02-14 17:10:34,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001362052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:10:34,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:10:34,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 17:10:34,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421338855] [2022-02-14 17:10:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:10:34,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 17:10:34,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 17:10:34,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 17:10:34,648 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:10:36,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:38,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:10:39,514 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-02-14 17:10:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 17:10:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 17:10:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:10:39,526 INFO L225 Difference]: With dead ends: 70 [2022-02-14 17:10:39,526 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 17:10:39,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 17:10:39,530 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-14 17:10:39,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-02-14 17:10:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 17:10:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-14 17:10:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-02-14 17:10:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-02-14 17:10:39,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-02-14 17:10:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:10:39,567 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-02-14 17:10:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:10:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-02-14 17:10:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 17:10:39,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:39,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 17:10:39,569 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -96361696, now seen corresponding path program 1 times [2022-02-14 17:10:39,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:39,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051875988] [2022-02-14 17:10:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:39,588 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:10:39,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061458985] [2022-02-14 17:10:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:39,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:10:39,590 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) [2022-02-14 17:10:39,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 17:10:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 17:10:39,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:10:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:39,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:10:39,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:39,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051875988] [2022-02-14 17:10:39,717 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:10:39,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061458985] [2022-02-14 17:10:39,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061458985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:10:39,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:10:39,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 17:10:39,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557763246] [2022-02-14 17:10:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:10:39,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 17:10:39,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 17:10:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 17:10:39,721 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 17:10:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:10:39,752 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-02-14 17:10:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 17:10:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-14 17:10:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:10:39,753 INFO L225 Difference]: With dead ends: 55 [2022-02-14 17:10:39,753 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 17:10:39,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 17:10:39,755 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 17:10:39,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 17:10:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 17:10:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-14 17:10:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-02-14 17:10:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-02-14 17:10:39,761 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-02-14 17:10:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:10:39,761 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-02-14 17:10:39,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 17:10:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-02-14 17:10:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 17:10:39,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:39,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:39,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 17:10:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:39,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 962099791, now seen corresponding path program 1 times [2022-02-14 17:10:39,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:39,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937009114] [2022-02-14 17:10:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:39,992 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:10:39,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305523051] [2022-02-14 17:10:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:10:39,994 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) [2022-02-14 17:10:39,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 17:10:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 17:10:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:10:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:40,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:10:40,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:40,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937009114] [2022-02-14 17:10:40,078 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:10:40,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305523051] [2022-02-14 17:10:40,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305523051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:10:40,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:10:40,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 17:10:40,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057374193] [2022-02-14 17:10:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:10:40,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 17:10:40,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 17:10:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 17:10:40,079 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 17:10:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:10:40,115 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-02-14 17:10:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 17:10:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-14 17:10:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:10:40,128 INFO L225 Difference]: With dead ends: 49 [2022-02-14 17:10:40,128 INFO L226 Difference]: Without dead ends: 40 [2022-02-14 17:10:40,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 17:10:40,129 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 17:10:40,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 17:10:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-14 17:10:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-14 17:10:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-02-14 17:10:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-14 17:10:40,135 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-02-14 17:10:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:10:40,136 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-14 17:10:40,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 17:10:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-14 17:10:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 17:10:40,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:40,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:40,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 17:10:40,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 17:10:40,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 963589341, now seen corresponding path program 1 times [2022-02-14 17:10:40,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:40,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850217226] [2022-02-14 17:10:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:10:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:40,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:10:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:40,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:40,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850217226] [2022-02-14 17:10:40,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850217226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:10:40,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:10:40,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 17:10:40,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910849639] [2022-02-14 17:10:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:10:40,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 17:10:40,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 17:10:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 17:10:40,577 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:10:43,091 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 [] [2022-02-14 17:10:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:10:45,865 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-02-14 17:10:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 17:10:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-02-14 17:10:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:10:45,866 INFO L225 Difference]: With dead ends: 72 [2022-02-14 17:10:45,866 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 17:10:45,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 17:10:45,867 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:10:45,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-02-14 17:10:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 17:10:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-14 17:10:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 17:10:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-02-14 17:10:45,876 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-02-14 17:10:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:10:45,876 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-02-14 17:10:45,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:10:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-02-14 17:10:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 17:10:45,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:45,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 17:10:45,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1701877900, now seen corresponding path program 1 times [2022-02-14 17:10:45,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:45,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146765811] [2022-02-14 17:10:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:45,885 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:10:45,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684886527] [2022-02-14 17:10:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:10:45,886 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) [2022-02-14 17:10:45,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 17:10:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 17:10:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:10:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:45,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:10:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:46,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:46,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146765811] [2022-02-14 17:10:46,030 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:10:46,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684886527] [2022-02-14 17:10:46,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684886527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:10:46,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:10:46,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 17:10:46,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903721098] [2022-02-14 17:10:46,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:10:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 17:10:46,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 17:10:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 17:10:46,031 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 17:10:48,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:50,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:52,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:55,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:57,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:10:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:10:57,467 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-02-14 17:10:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 17:10:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-02-14 17:10:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:10:57,469 INFO L225 Difference]: With dead ends: 102 [2022-02-14 17:10:57,469 INFO L226 Difference]: Without dead ends: 83 [2022-02-14 17:10:57,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 17:10:57,471 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 55 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-02-14 17:10:57,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 289 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 11.4s Time] [2022-02-14 17:10:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-14 17:10:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2022-02-14 17:10:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 47 states have internal predecessors, (57), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 17:10:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2022-02-14 17:10:57,487 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 23 [2022-02-14 17:10:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:10:57,488 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2022-02-14 17:10:57,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 17:10:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2022-02-14 17:10:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 17:10:57,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:10:57,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:10:57,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 17:10:57,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:57,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:10:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:10:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1564262277, now seen corresponding path program 1 times [2022-02-14 17:10:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:10:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525805812] [2022-02-14 17:10:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:10:57,700 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:10:57,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446260798] [2022-02-14 17:10:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:10:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:10:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:10:57,703 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) [2022-02-14 17:10:57,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 17:10:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:10:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 17:10:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:10:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:10:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:10:57,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:10:57,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525805812] [2022-02-14 17:10:57,845 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:10:57,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446260798] [2022-02-14 17:10:57,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446260798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:10:57,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:10:57,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 17:10:57,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970293027] [2022-02-14 17:10:57,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:10:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 17:10:57,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:10:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 17:10:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 17:10:57,846 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 17:11:00,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:03,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:11:05,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:11:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:11:09,754 INFO L93 Difference]: Finished difference Result 155 states and 209 transitions. [2022-02-14 17:11:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 17:11:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-02-14 17:11:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:11:09,756 INFO L225 Difference]: With dead ends: 155 [2022-02-14 17:11:09,756 INFO L226 Difference]: Without dead ends: 139 [2022-02-14 17:11:09,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 17:11:09,756 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 126 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-02-14 17:11:09,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 301 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 131 Invalid, 3 Unknown, 0 Unchecked, 11.9s Time] [2022-02-14 17:11:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-14 17:11:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2022-02-14 17:11:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 77 states have internal predecessors, (96), 46 states have call successors, (46), 12 states have call predecessors, (46), 10 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-14 17:11:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 182 transitions. [2022-02-14 17:11:09,772 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 182 transitions. Word has length 24 [2022-02-14 17:11:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:11:09,772 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 182 transitions. [2022-02-14 17:11:09,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 17:11:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 182 transitions. [2022-02-14 17:11:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 17:11:09,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:11:09,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:11:09,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 17:11:09,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:09,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:11:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:11:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1562772727, now seen corresponding path program 1 times [2022-02-14 17:11:09,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:11:09,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370728968] [2022-02-14 17:11:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:11:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:10,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:11:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:10,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:11:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:10,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:11:10,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370728968] [2022-02-14 17:11:10,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370728968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 17:11:10,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493487653] [2022-02-14 17:11:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:10,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:11:10,133 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) [2022-02-14 17:11:10,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 17:11:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 17:11:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:11:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:10,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:11:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:10,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493487653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:11:10,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 17:11:10,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-14 17:11:10,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076374801] [2022-02-14 17:11:10,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 17:11:10,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 17:11:10,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:11:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 17:11:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-14 17:11:10,463 INFO L87 Difference]: Start difference. First operand 130 states and 182 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:11:14,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:17,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:20,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:22,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:24,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:27,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:30,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:32,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:34,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:11:34,807 INFO L93 Difference]: Finished difference Result 204 states and 293 transitions. [2022-02-14 17:11:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 17:11:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-14 17:11:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:11:34,809 INFO L225 Difference]: With dead ends: 204 [2022-02-14 17:11:34,809 INFO L226 Difference]: Without dead ends: 183 [2022-02-14 17:11:34,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-14 17:11:34,813 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 163 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:11:34,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 266 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 417 Invalid, 7 Unknown, 0 Unchecked, 24.2s Time] [2022-02-14 17:11:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-14 17:11:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2022-02-14 17:11:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.268041237113402) internal successors, (123), 104 states have internal predecessors, (123), 65 states have call successors, (65), 15 states have call predecessors, (65), 13 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-14 17:11:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 245 transitions. [2022-02-14 17:11:34,831 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 245 transitions. Word has length 24 [2022-02-14 17:11:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:11:34,831 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 245 transitions. [2022-02-14 17:11:34,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:11:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 245 transitions. [2022-02-14 17:11:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-14 17:11:34,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:11:34,832 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 17:11:34,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 17:11:35,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:35,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:11:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:11:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash -45171523, now seen corresponding path program 1 times [2022-02-14 17:11:35,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:11:35,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785969102] [2022-02-14 17:11:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:35,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:11:35,060 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:11:35,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597782851] [2022-02-14 17:11:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:35,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:11:35,062 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) [2022-02-14 17:11:35,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 17:11:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 17:11:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:11:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 17:11:35,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:11:35,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:11:35,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785969102] [2022-02-14 17:11:35,249 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:11:35,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597782851] [2022-02-14 17:11:35,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597782851] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:11:35,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:11:35,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 17:11:35,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024533754] [2022-02-14 17:11:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:11:35,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 17:11:35,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:11:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 17:11:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 17:11:35,251 INFO L87 Difference]: Start difference. First operand 176 states and 245 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 17:11:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:11:35,875 INFO L93 Difference]: Finished difference Result 182 states and 249 transitions. [2022-02-14 17:11:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 17:11:35,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-02-14 17:11:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:11:35,877 INFO L225 Difference]: With dead ends: 182 [2022-02-14 17:11:35,877 INFO L226 Difference]: Without dead ends: 152 [2022-02-14 17:11:35,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 17:11:35,878 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 17:11:35,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 17:11:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-14 17:11:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-14 17:11:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 90 states have internal predecessors, (107), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 17:11:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2022-02-14 17:11:35,891 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 31 [2022-02-14 17:11:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:11:35,892 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2022-02-14 17:11:35,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 17:11:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2022-02-14 17:11:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 17:11:35,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:11:35,893 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:11:35,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 17:11:36,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:36,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:11:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:11:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1547125783, now seen corresponding path program 1 times [2022-02-14 17:11:36,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:11:36,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123121100] [2022-02-14 17:11:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:11:36,115 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:11:36,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399460505] [2022-02-14 17:11:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:11:36,116 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) [2022-02-14 17:11:36,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 17:11:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 17:11:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:11:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-14 17:11:36,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:11:36,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:11:36,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123121100] [2022-02-14 17:11:36,273 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:11:36,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399460505] [2022-02-14 17:11:36,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399460505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:11:36,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:11:36,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 17:11:36,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603738029] [2022-02-14 17:11:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:11:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 17:11:36,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:11:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 17:11:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 17:11:36,274 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 17:11:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:11:36,641 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2022-02-14 17:11:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 17:11:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-02-14 17:11:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:11:36,643 INFO L225 Difference]: With dead ends: 182 [2022-02-14 17:11:36,643 INFO L226 Difference]: Without dead ends: 177 [2022-02-14 17:11:36,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 17:11:36,644 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 17:11:36,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 17:11:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-14 17:11:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-02-14 17:11:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 17:11:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2022-02-14 17:11:36,655 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 34 [2022-02-14 17:11:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:11:36,655 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2022-02-14 17:11:36,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 17:11:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2022-02-14 17:11:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 17:11:36,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:11:36,656 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:11:36,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 17:11:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:36,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:11:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:11:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 821435566, now seen corresponding path program 1 times [2022-02-14 17:11:36,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:11:36,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450377776] [2022-02-14 17:11:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:11:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:11:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:36,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:11:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:36,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:11:36,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450377776] [2022-02-14 17:11:36,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450377776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 17:11:36,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929738104] [2022-02-14 17:11:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:11:36,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:11:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:11:36,974 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) [2022-02-14 17:11:36,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 17:11:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:11:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 17:11:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:11:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:37,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:11:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:11:37,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929738104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:11:37,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 17:11:37,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-14 17:11:37,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295560581] [2022-02-14 17:11:37,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 17:11:37,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 17:11:37,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:11:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 17:11:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-14 17:11:37,236 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 17:11:42,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:44,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:11:46,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:48,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:51,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:53,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:55,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:57,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:11:59,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:01,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:03,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:05,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:08,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:16,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 17:12:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:12:16,173 INFO L93 Difference]: Finished difference Result 325 states and 411 transitions. [2022-02-14 17:12:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-14 17:12:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-14 17:12:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:12:16,175 INFO L225 Difference]: With dead ends: 325 [2022-02-14 17:12:16,176 INFO L226 Difference]: Without dead ends: 285 [2022-02-14 17:12:16,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-02-14 17:12:16,177 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 104 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-02-14 17:12:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 199 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 430 Invalid, 13 Unknown, 0 Unchecked, 38.7s Time] [2022-02-14 17:12:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-14 17:12:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 247. [2022-02-14 17:12:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 157 states have internal predecessors, (176), 72 states have call successors, (72), 26 states have call predecessors, (72), 25 states have return successors, (67), 63 states have call predecessors, (67), 67 states have call successors, (67) [2022-02-14 17:12:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 315 transitions. [2022-02-14 17:12:16,192 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 315 transitions. Word has length 32 [2022-02-14 17:12:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:12:16,192 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 315 transitions. [2022-02-14 17:12:16,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 17:12:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 315 transitions. [2022-02-14 17:12:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 17:12:16,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:12:16,194 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:12:16,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 17:12:16,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 17:12:16,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:12:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:12:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash -271152338, now seen corresponding path program 2 times [2022-02-14 17:12:16,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:12:16,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957309326] [2022-02-14 17:12:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:12:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:12:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:12:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:12:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:12:16,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:12:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:12:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 17:12:16,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:12:16,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957309326] [2022-02-14 17:12:16,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957309326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 17:12:16,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885173566] [2022-02-14 17:12:16,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 17:12:16,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:12:16,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:12:16,605 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) [2022-02-14 17:12:16,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 17:12:16,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-14 17:12:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 17:12:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 17:12:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:12:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-14 17:12:16,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:12:16,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885173566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:12:16,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 17:12:16,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-14 17:12:16,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518509546] [2022-02-14 17:12:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:12:16,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 17:12:16,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:12:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 17:12:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-02-14 17:12:16,732 INFO L87 Difference]: Start difference. First operand 247 states and 315 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:12:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:12:16,769 INFO L93 Difference]: Finished difference Result 284 states and 364 transitions. [2022-02-14 17:12:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 17:12:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-02-14 17:12:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:12:16,771 INFO L225 Difference]: With dead ends: 284 [2022-02-14 17:12:16,771 INFO L226 Difference]: Without dead ends: 244 [2022-02-14 17:12:16,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-14 17:12:16,772 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 17:12:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 17:12:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-14 17:12:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2022-02-14 17:12:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 142 states have (on average 1.176056338028169) internal successors, (167), 149 states have internal predecessors, (167), 71 states have call successors, (71), 26 states have call predecessors, (71), 25 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2022-02-14 17:12:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2022-02-14 17:12:16,785 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 50 [2022-02-14 17:12:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:12:16,785 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2022-02-14 17:12:16,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 17:12:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2022-02-14 17:12:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 17:12:16,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:12:16,787 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:12:16,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 17:12:17,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:12:17,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:12:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:12:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 109392637, now seen corresponding path program 1 times [2022-02-14 17:12:17,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:12:17,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363965079] [2022-02-14 17:12:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:12:17,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:12:17,011 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:12:17,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120235196] [2022-02-14 17:12:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:12:17,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:12:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:12:17,013 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) [2022-02-14 17:12:17,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process