/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:27:23,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:27:23,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:27:23,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:27:23,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:27:23,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:27:23,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:27:23,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:27:23,912 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:27:23,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:27:23,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:27:23,914 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:27:23,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:27:23,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:27:23,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:27:23,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:27:23,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:27:23,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:27:23,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:27:23,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:23,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:27:23,917 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:27:24,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:27:24,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:27:24,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:27:24,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:27:24,140 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:27:24,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2022-03-20 15:27:24,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf328c28f/ad34a6d3fe0844a38867046c6bf54ba0/FLAGeb4020c1a [2022-03-20 15:27:24,509 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:27:24,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2022-03-20 15:27:24,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf328c28f/ad34a6d3fe0844a38867046c6bf54ba0/FLAGeb4020c1a [2022-03-20 15:27:24,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf328c28f/ad34a6d3fe0844a38867046c6bf54ba0 [2022-03-20 15:27:24,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:27:24,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:27:24,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:24,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:27:24,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:27:24,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:24" (1/1) ... [2022-03-20 15:27:24,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414015a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:24, skipping insertion in model container [2022-03-20 15:27:24,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:24" (1/1) ... [2022-03-20 15:27:24,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:27:24,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:27:25,095 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/hard-ll_valuebound2.c[538,551] [2022-03-20 15:27:25,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:25,116 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:27:25,126 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/hard-ll_valuebound2.c[538,551] [2022-03-20 15:27:25,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:25,143 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:27:25,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25 WrapperNode [2022-03-20 15:27:25,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:25,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:27:25,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:27:25,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:27:25,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:27:25,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:27:25,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:27:25,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:27:25,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (1/1) ... [2022-03-20 15:27:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:25,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:25,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:27:25,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:27:25,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:27:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:27:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:27:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:27:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:27:25,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 15:27:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:27:25,299 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:27:25,301 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:27:25,418 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:27:25,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:27:25,424 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 15:27:25,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:25 BoogieIcfgContainer [2022-03-20 15:27:25,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:27:25,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:27:25,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:27:25,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:27:25,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:27:24" (1/3) ... [2022-03-20 15:27:25,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3336ba39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:25, skipping insertion in model container [2022-03-20 15:27:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:25" (2/3) ... [2022-03-20 15:27:25,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3336ba39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:25, skipping insertion in model container [2022-03-20 15:27:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:25" (3/3) ... [2022-03-20 15:27:25,453 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2022-03-20 15:27:25,457 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:27:25,457 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:27:25,521 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:27:25,526 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 15:27:25,527 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:27:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:27:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:25,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:25,546 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:25,546 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 15:27:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:25,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219606779] [2022-03-20 15:27:25,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-20 15:27:25,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931956965] [2022-03-20 15:27:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:25,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:25,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:25,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:25,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:25,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931956965] [2022-03-20 15:27:25,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931956965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:25,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:25,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:25,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219606779] [2022-03-20 15:27:25,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219606779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:25,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:25,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:25,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660350990] [2022-03-20 15:27:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:25,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:27:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:27:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:25,762 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:25,885 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 15:27:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:27:25,887 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 15:27:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:25,896 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:25,897 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 15:27:25,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:25,902 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:25,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 15:27:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 15:27:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 15:27:25,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 15:27:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:25,937 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 15:27:25,937 INFO L479 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 15:27:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:25,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:25,939 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:25,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:27:25,939 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 15:27:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107390901] [2022-03-20 15:27:25,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-20 15:27:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873276312] [2022-03-20 15:27:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:25,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:26,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873276312] [2022-03-20 15:27:26,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873276312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:26,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:26,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:26,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107390901] [2022-03-20 15:27:26,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107390901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:26,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124319537] [2022-03-20 15:27:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:26,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:26,084 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:26,318 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 15:27:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 15:27:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:26,321 INFO L225 Difference]: With dead ends: 46 [2022-03-20 15:27:26,321 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 15:27:26,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:26,327 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:26,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:27:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 15:27:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 15:27:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 15:27:26,359 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 15:27:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:26,359 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 15:27:26,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 15:27:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:27:26,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:26,360 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:26,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 15:27:26,361 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 15:27:26,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:26,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269513920] [2022-03-20 15:27:26,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-20 15:27:26,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661108515] [2022-03-20 15:27:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 15:27:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:26,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:26,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661108515] [2022-03-20 15:27:26,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661108515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:26,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:26,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:26,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269513920] [2022-03-20 15:27:26,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269513920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:26,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120998269] [2022-03-20 15:27:26,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:26,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:26,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:26,468 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:26,660 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 15:27:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:27:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:26,663 INFO L225 Difference]: With dead ends: 50 [2022-03-20 15:27:26,663 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 15:27:26,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:26,666 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:26,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 15:27:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 15:27:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 15:27:26,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 15:27:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:26,701 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 15:27:26,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 15:27:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 15:27:26,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:26,703 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 15:27:26,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 15:27:26,705 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 15:27:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:26,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [571876711] [2022-03-20 15:27:26,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-20 15:27:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:26,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488055525] [2022-03-20 15:27:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:26,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:26,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265589240] [2022-03-20 15:27:26,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:26,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:26,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:26,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:27:26,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:26,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:26,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:27:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 15:27:27,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488055525] [2022-03-20 15:27:27,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265589240] [2022-03-20 15:27:27,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265589240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:27,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:27,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:27:27,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [571876711] [2022-03-20 15:27:27,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [571876711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:27,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:27,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:27:27,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450903599] [2022-03-20 15:27:27,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:27,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:27:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:27:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:27:27,182 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:27:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:27,309 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 15:27:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:27:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2022-03-20 15:27:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:27,311 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:27,311 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 15:27:27,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:27,317 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:27,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 225 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 15:27:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 15:27:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:27:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 15:27:27,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 15:27:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:27,339 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 15:27:27,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:27:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 15:27:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 15:27:27,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:27,341 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:27,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 15:27:27,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:27,564 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 15:27:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:27,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315596374] [2022-03-20 15:27:27,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-20 15:27:27,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:27,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358965777] [2022-03-20 15:27:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:27,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:27,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577217737] [2022-03-20 15:27:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:27,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:27,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:27,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:27:27,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 15:27:27,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 15:27:27,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:27:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358965777] [2022-03-20 15:27:28,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577217737] [2022-03-20 15:27:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577217737] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:28,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:28,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 15:27:28,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315596374] [2022-03-20 15:27:28,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315596374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:28,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:28,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871560427] [2022-03-20 15:27:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:28,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:28,081 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:28,141 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 15:27:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 15:27:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:28,143 INFO L225 Difference]: With dead ends: 68 [2022-03-20 15:27:28,143 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 15:27:28,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:28,144 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:28,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 15:27:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 15:27:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:27:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 15:27:28,158 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 15:27:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:28,158 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 15:27:28,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 15:27:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 15:27:28,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:28,160 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:28,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:28,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:28,383 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 15:27:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965105587] [2022-03-20 15:27:28,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-20 15:27:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775566290] [2022-03-20 15:27:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:28,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:28,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660480165] [2022-03-20 15:27:28,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:28,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:28,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:28,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:27:28,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:27:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 15:27:28,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 15:27:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775566290] [2022-03-20 15:27:28,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660480165] [2022-03-20 15:27:28,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660480165] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:28,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:28,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 15:27:28,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965105587] [2022-03-20 15:27:28,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965105587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:28,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:28,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514574007] [2022-03-20 15:27:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:28,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:28,898 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:29,059 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 15:27:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 15:27:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:29,061 INFO L225 Difference]: With dead ends: 76 [2022-03-20 15:27:29,061 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 15:27:29,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:29,062 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:29,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 15:27:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 15:27:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:27:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 15:27:29,077 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 15:27:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:29,077 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 15:27:29,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 15:27:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 15:27:29,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:29,078 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:29,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:29,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:29,291 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 15:27:29,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:29,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422548554] [2022-03-20 15:27:29,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-20 15:27:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:29,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114347648] [2022-03-20 15:27:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:29,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:29,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808009800] [2022-03-20 15:27:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:29,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:29,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:29,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:27:29,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:29,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:27:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:27:29,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:29,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:29,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114347648] [2022-03-20 15:27:29,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:29,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808009800] [2022-03-20 15:27:29,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808009800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:29,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:29,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:29,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422548554] [2022-03-20 15:27:29,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422548554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:29,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:29,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:29,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951951851] [2022-03-20 15:27:29,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:29,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:29,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:29,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:27:29,474 INFO L87 Difference]: Start difference. First operand 71 states and 88 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:27:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:29,581 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 15:27:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:29,582 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 15:27:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:29,584 INFO L225 Difference]: With dead ends: 79 [2022-03-20 15:27:29,584 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 15:27:29,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:29,585 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:29,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 15:27:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 15:27:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:27:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 15:27:29,607 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 15:27:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:29,607 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 15:27:29,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:27:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 15:27:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 15:27:29,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:29,612 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:29,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:29,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:29,830 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 15:27:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999484220] [2022-03-20 15:27:29,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-20 15:27:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691865538] [2022-03-20 15:27:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:29,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141345939] [2022-03-20 15:27:29,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:29,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:29,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:29,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:27:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:29,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 15:27:29,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 15:27:30,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:27:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:38,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691865538] [2022-03-20 15:27:38,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:38,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141345939] [2022-03-20 15:27:38,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141345939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:38,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:38,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-20 15:27:38,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:38,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999484220] [2022-03-20 15:27:38,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999484220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:38,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:38,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:27:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789954933] [2022-03-20 15:27:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:38,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:27:38,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:27:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:27:38,228 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 15:27:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:38,573 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-20 15:27:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:27:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-20 15:27:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:38,575 INFO L225 Difference]: With dead ends: 135 [2022-03-20 15:27:38,575 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 15:27:38,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:27:38,577 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:38,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 231 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:27:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 15:27:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-20 15:27:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-20 15:27:38,593 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-20 15:27:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:38,594 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-20 15:27:38,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 15:27:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-20 15:27:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 15:27:38,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:38,595 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:38,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:38,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:38,796 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-20 15:27:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318828460] [2022-03-20 15:27:38,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-20 15:27:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129073747] [2022-03-20 15:27:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:38,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:38,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821245946] [2022-03-20 15:27:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:27:38,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:38,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:38,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:27:38,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:27:38,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 15:27:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-20 15:27:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 15:27:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129073747] [2022-03-20 15:27:41,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821245946] [2022-03-20 15:27:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821245946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:41,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:41,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 15:27:41,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318828460] [2022-03-20 15:27:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318828460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:41,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:41,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:27:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472738024] [2022-03-20 15:27:41,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:41,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:27:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:27:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:27:41,051 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 15:27:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:41,329 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-20 15:27:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:27:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2022-03-20 15:27:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:41,331 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:27:41,331 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:27:41,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:27:41,332 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:41,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 278 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:27:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:27:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 15:27:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-20 15:27:41,347 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-20 15:27:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:41,347 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-20 15:27:41,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 15:27:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-20 15:27:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:27:41,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:41,348 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:41,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:41,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:41,564 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 15:27:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:41,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1394267263] [2022-03-20 15:27:41,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-20 15:27:41,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:41,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069109633] [2022-03-20 15:27:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:41,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010866649] [2022-03-20 15:27:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:41,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:41,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:27:41,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:27:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 15:27:42,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 15:27:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:43,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069109633] [2022-03-20 15:27:43,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010866649] [2022-03-20 15:27:43,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010866649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:43,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:43,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2022-03-20 15:27:43,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1394267263] [2022-03-20 15:27:43,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1394267263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:43,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:43,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:27:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372718754] [2022-03-20 15:27:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:43,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:27:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:27:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:27:43,681 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 15:27:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:44,049 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2022-03-20 15:27:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:27:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-20 15:27:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:44,050 INFO L225 Difference]: With dead ends: 145 [2022-03-20 15:27:44,051 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 15:27:44,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:27:44,052 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 10 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:44,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 325 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:27:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 15:27:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2022-03-20 15:27:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:27:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2022-03-20 15:27:44,063 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 86 [2022-03-20 15:27:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:44,064 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2022-03-20 15:27:44,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 15:27:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2022-03-20 15:27:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 15:27:44,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:44,065 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:44,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:44,275 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-20 15:27:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349397352] [2022-03-20 15:27:44,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-20 15:27:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081569605] [2022-03-20 15:27:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:44,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:44,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:44,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807887191] [2022-03-20 15:27:44,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:27:44,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:44,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:44,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:27:44,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:27:44,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:27:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 15:27:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:27:57,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:41,083 WARN L232 SmtUtils]: Spent 25.87s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:29:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:29:25,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:29:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081569605] [2022-03-20 15:29:25,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:29:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807887191] [2022-03-20 15:29:25,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807887191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:29:25,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:29:25,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-20 15:29:25,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:29:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349397352] [2022-03-20 15:29:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349397352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:29:25,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:29:25,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:29:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865568020] [2022-03-20 15:29:25,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:29:25,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:29:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:29:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-20 15:29:25,832 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:29:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:29:26,216 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-03-20 15:29:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:29:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-20 15:29:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:29:26,217 INFO L225 Difference]: With dead ends: 107 [2022-03-20 15:29:26,217 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 15:29:26,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-20 15:29:26,218 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:29:26,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:29:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 15:29:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 15:29:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 15:29:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2022-03-20 15:29:26,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 92 [2022-03-20 15:29:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:29:26,232 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2022-03-20 15:29:26,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:29:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2022-03-20 15:29:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 15:29:26,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:29:26,233 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:29:26,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 15:29:26,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:29:26,452 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:29:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:29:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-20 15:29:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:26,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579521722] [2022-03-20 15:29:26,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:29:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-20 15:29:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:29:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493528846] [2022-03-20 15:29:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:29:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:29:26,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:29:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772584980] [2022-03-20 15:29:26,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:29:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:29:26,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:29:26,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:29:26,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:29:26,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:29:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 15:29:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:29:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 15:29:27,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:29:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-03-20 15:29:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:29:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493528846] [2022-03-20 15:29:29,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:29:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772584980] [2022-03-20 15:29:29,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772584980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:29:29,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:29:29,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2022-03-20 15:29:29,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:29:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579521722] [2022-03-20 15:29:29,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579521722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:29:29,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:29:29,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:29:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877843874] [2022-03-20 15:29:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:29:29,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:29:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:29:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:29:29,756 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 15:29:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:29:30,506 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2022-03-20 15:29:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:29:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 97 [2022-03-20 15:29:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:29:30,508 INFO L225 Difference]: With dead ends: 154 [2022-03-20 15:29:30,508 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 15:29:30,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:29:30,509 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 36 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:29:30,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 414 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:29:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 15:29:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 15:29:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 82 states have internal predecessors, (84), 35 states have call successors, (35), 17 states have call predecessors, (35), 16 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 15:29:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2022-03-20 15:29:30,529 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 97 [2022-03-20 15:29:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:29:30,529 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2022-03-20 15:29:30,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 15:29:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2022-03-20 15:29:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:29:30,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:29:30,530 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:29:30,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:29:30,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:30,754 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:29:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:29:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-20 15:29:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867912405] [2022-03-20 15:29:30,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:29:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-20 15:29:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:29:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656789944] [2022-03-20 15:29:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:29:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:29:30,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:29:30,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261010829] [2022-03-20 15:29:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:29:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:29:30,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:29:30,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:29:30,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:29:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:29:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:29:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates...