/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:38:15,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:38:15,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:38:15,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:38:15,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:38:15,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:38:15,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:38:15,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:38:15,599 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:38:15,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:38:15,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:38:15,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:38:15,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:38:15,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:38:15,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:38:15,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:38:15,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:38:15,603 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:38:15,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:38:15,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:38:15,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:38:15,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:38:15,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:38:15,838 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:38:15,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-03-20 20:38:15,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abe8b692/310b9cb4f34349c69ca621d192731304/FLAG754fe493f [2022-03-20 20:38:16,215 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:38:16,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-03-20 20:38:16,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abe8b692/310b9cb4f34349c69ca621d192731304/FLAG754fe493f [2022-03-20 20:38:16,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abe8b692/310b9cb4f34349c69ca621d192731304 [2022-03-20 20:38:16,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:38:16,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:38:16,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:38:16,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:38:16,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:38:16,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7022c651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16, skipping insertion in model container [2022-03-20 20:38:16,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:38:16,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:38:16,838 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/egcd-ll_unwindbound10.c[489,502] [2022-03-20 20:38:16,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:38:16,877 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:38:16,887 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/egcd-ll_unwindbound10.c[489,502] [2022-03-20 20:38:16,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:38:16,919 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:38:16,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16 WrapperNode [2022-03-20 20:38:16,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:38:16,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:38:16,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:38:16,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:38:16,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:38:16,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:38:16,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:38:16,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:38:16,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (1/1) ... [2022-03-20 20:38:16,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:38:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:16,997 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 20:38:17,020 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 20:38:17,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:38:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:38:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:38:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:38:17,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:38:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:38:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:38:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:38:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:38:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:38:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:38:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:38:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:38:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:38:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:38:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:38:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:38:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:38:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:38:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:38:17,102 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:38:17,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:38:17,233 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:38:17,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:38:17,238 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 20:38:17,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:38:17 BoogieIcfgContainer [2022-03-20 20:38:17,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:38:17,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:38:17,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:38:17,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:38:17,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:38:16" (1/3) ... [2022-03-20 20:38:17,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdd1a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:38:17, skipping insertion in model container [2022-03-20 20:38:17,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:38:16" (2/3) ... [2022-03-20 20:38:17,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdd1a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:38:17, skipping insertion in model container [2022-03-20 20:38:17,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:38:17" (3/3) ... [2022-03-20 20:38:17,268 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2022-03-20 20:38:17,272 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:38:17,272 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:38:17,322 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:38:17,327 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 20:38:17,327 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:38:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:38:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 20:38:17,343 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:17,344 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:17,344 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-03-20 20:38:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:17,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881464308] [2022-03-20 20:38:17,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-03-20 20:38:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476548315] [2022-03-20 20:38:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:17,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:38:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:38:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 20:38:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:38:17,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:17,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476548315] [2022-03-20 20:38:17,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476548315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:17,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:17,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:38:17,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:17,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881464308] [2022-03-20 20:38:17,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881464308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:17,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:38:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275899913] [2022-03-20 20:38:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:17,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:38:17,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:38:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:38:17,541 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:38:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:17,621 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-20 20:38:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:38:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 20:38:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:17,628 INFO L225 Difference]: With dead ends: 64 [2022-03-20 20:38:17,629 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 20:38:17,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:38:17,633 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:17,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:38:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 20:38:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 20:38:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:38:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 20:38:17,663 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-20 20:38:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:17,663 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 20:38:17,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:38:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 20:38:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 20:38:17,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:17,665 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:17,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:38:17,665 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-03-20 20:38:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:17,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863891992] [2022-03-20 20:38:17,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-03-20 20:38:17,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717316622] [2022-03-20 20:38:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:38:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:38:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 20:38:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:38:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:38:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717316622] [2022-03-20 20:38:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717316622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:17,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:17,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863891992] [2022-03-20 20:38:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863891992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:17,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:17,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825074130] [2022-03-20 20:38:17,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:17,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:17,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:38:17,783 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:38:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:17,905 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-20 20:38:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:38:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 20:38:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:17,908 INFO L225 Difference]: With dead ends: 42 [2022-03-20 20:38:17,908 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 20:38:17,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 20:38:17,909 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:17,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:38:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 20:38:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 20:38:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:38:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 20:38:17,917 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-20 20:38:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:17,918 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 20:38:17,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:38:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 20:38:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 20:38:17,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:17,920 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:17,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 20:38:17,921 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-03-20 20:38:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:17,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074140695] [2022-03-20 20:38:17,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-03-20 20:38:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:17,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961801607] [2022-03-20 20:38:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:17,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:17,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:17,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066706485] [2022-03-20 20:38:17,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:17,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:17,945 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 20:38:17,948 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 20:38:17,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:38:17,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:38:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:38:18,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:38:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961801607] [2022-03-20 20:38:18,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066706485] [2022-03-20 20:38:18,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066706485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:18,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:18,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:18,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074140695] [2022-03-20 20:38:18,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074140695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:18,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:18,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:18,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523736561] [2022-03-20 20:38:18,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:18,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:38:18,122 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:38:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:18,188 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-20 20:38:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 20:38:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:18,191 INFO L225 Difference]: With dead ends: 49 [2022-03-20 20:38:18,191 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 20:38:18,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:38:18,198 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:18,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 20:38:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 20:38:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:38:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-20 20:38:18,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-20 20:38:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:18,218 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-20 20:38:18,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 20:38:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-20 20:38:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 20:38:18,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:18,219 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:18,241 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 20:38:18,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:18,436 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-03-20 20:38:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467350369] [2022-03-20 20:38:18,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-03-20 20:38:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567458215] [2022-03-20 20:38:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:18,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:18,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214018303] [2022-03-20 20:38:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:18,468 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 20:38:18,469 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 20:38:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:38:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:38:18,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:38:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567458215] [2022-03-20 20:38:18,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214018303] [2022-03-20 20:38:18,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214018303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:18,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:18,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:18,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:18,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467350369] [2022-03-20 20:38:18,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467350369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:18,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:18,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638429417] [2022-03-20 20:38:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:18,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:38:18,646 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 20:38:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:18,683 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-20 20:38:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 20:38:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:18,685 INFO L225 Difference]: With dead ends: 53 [2022-03-20 20:38:18,685 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 20:38:18,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 20:38:18,687 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:18,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 20:38:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 20:38:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:38:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-20 20:38:18,697 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-20 20:38:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:18,698 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-20 20:38:18,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 20:38:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-20 20:38:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:38:18,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:18,699 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:18,719 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 20:38:18,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 20:38:18,912 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-03-20 20:38:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:18,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120716305] [2022-03-20 20:38:18,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-03-20 20:38:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:18,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517003602] [2022-03-20 20:38:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:18,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287816153] [2022-03-20 20:38:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:18,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:18,925 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 20:38:18,926 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 20:38:18,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:38:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 20:38:19,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 20:38:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517003602] [2022-03-20 20:38:19,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287816153] [2022-03-20 20:38:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287816153] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:38:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:38:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 20:38:19,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120716305] [2022-03-20 20:38:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120716305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463805482] [2022-03-20 20:38:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:19,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:38:19,247 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:38:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:19,296 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-20 20:38:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 20:38:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:19,299 INFO L225 Difference]: With dead ends: 75 [2022-03-20 20:38:19,299 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 20:38:19,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:38:19,305 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:19,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 20:38:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 20:38:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 20:38:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-20 20:38:19,326 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-20 20:38:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:19,326 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-20 20:38:19,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:38:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-20 20:38:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 20:38:19,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:19,332 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:19,371 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 20:38:19,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:19,549 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-03-20 20:38:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538605452] [2022-03-20 20:38:19,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-03-20 20:38:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:19,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786311840] [2022-03-20 20:38:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:19,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:19,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730502629] [2022-03-20 20:38:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:19,567 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 20:38:19,568 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 20:38:19,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:38:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:38:19,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:38:19,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:19,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786311840] [2022-03-20 20:38:19,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:19,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730502629] [2022-03-20 20:38:19,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730502629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:19,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:19,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:19,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:19,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538605452] [2022-03-20 20:38:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538605452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:19,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:19,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798239234] [2022-03-20 20:38:19,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:19,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:38:19,668 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:38:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:19,702 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-20 20:38:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-20 20:38:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:19,703 INFO L225 Difference]: With dead ends: 87 [2022-03-20 20:38:19,703 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 20:38:19,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:38:19,704 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:19,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 20:38:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-20 20:38:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:38:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-20 20:38:19,715 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-20 20:38:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:19,715 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-20 20:38:19,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:38:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-20 20:38:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:38:19,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:19,716 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:19,746 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 20:38:19,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:19,938 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-03-20 20:38:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153020703] [2022-03-20 20:38:19,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-03-20 20:38:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473053841] [2022-03-20 20:38:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:19,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391489651] [2022-03-20 20:38:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:19,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:19,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:19,967 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 20:38:19,968 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 20:38:20,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:20,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:38:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:38:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:38:20,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473053841] [2022-03-20 20:38:20,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391489651] [2022-03-20 20:38:20,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391489651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:20,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:20,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 20:38:20,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153020703] [2022-03-20 20:38:20,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153020703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:20,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:20,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:20,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657165967] [2022-03-20 20:38:20,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:20,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:38:20,220 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 20:38:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:20,272 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-20 20:38:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:38:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 20:38:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:20,281 INFO L225 Difference]: With dead ends: 121 [2022-03-20 20:38:20,281 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 20:38:20,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:38:20,282 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:20,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 20:38:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-20 20:38:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:38:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-20 20:38:20,303 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-20 20:38:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:20,304 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-20 20:38:20,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 20:38:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-20 20:38:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:38:20,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:20,306 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2022-03-20 20:38:20,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 20:38:20,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:20,519 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-03-20 20:38:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58856578] [2022-03-20 20:38:20,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-03-20 20:38:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409390990] [2022-03-20 20:38:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:20,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:20,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807055397] [2022-03-20 20:38:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:20,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:20,555 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 20:38:20,568 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 20:38:20,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:38:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:38:20,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:38:20,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409390990] [2022-03-20 20:38:20,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:20,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807055397] [2022-03-20 20:38:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807055397] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:20,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:20,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:20,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:20,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58856578] [2022-03-20 20:38:20,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58856578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:20,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:20,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792200577] [2022-03-20 20:38:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:20,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:20,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:38:20,729 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:38:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:20,769 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-20 20:38:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 20:38:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:20,773 INFO L225 Difference]: With dead ends: 106 [2022-03-20 20:38:20,773 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 20:38:20,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 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 20:38:20,775 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:20,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 20:38:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 20:38:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 20:38:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-20 20:38:20,804 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-20 20:38:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:20,806 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-20 20:38:20,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:38:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-20 20:38:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:38:20,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:20,810 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:20,847 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 20:38:21,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:21,031 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-03-20 20:38:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513935839] [2022-03-20 20:38:21,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-03-20 20:38:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448437738] [2022-03-20 20:38:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:21,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:21,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652087012] [2022-03-20 20:38:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:21,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:21,054 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 20:38:21,055 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 20:38:21,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:21,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 20:38:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:38:21,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:38:21,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448437738] [2022-03-20 20:38:21,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652087012] [2022-03-20 20:38:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652087012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:21,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:21,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:38:21,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513935839] [2022-03-20 20:38:21,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513935839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:21,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:21,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:38:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596563427] [2022-03-20 20:38:21,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:21,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:38:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:38:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:38:21,309 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:38:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:21,419 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-20 20:38:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:38:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-20 20:38:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:21,420 INFO L225 Difference]: With dead ends: 118 [2022-03-20 20:38:21,420 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 20:38:21,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:38:21,422 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:21,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:38:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 20:38:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-20 20:38:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 20:38:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-20 20:38:21,432 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-20 20:38:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:21,432 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-20 20:38:21,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:38:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-20 20:38:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 20:38:21,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:21,433 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:21,453 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 20:38:21,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:21,652 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-03-20 20:38:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852070979] [2022-03-20 20:38:21,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-03-20 20:38:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986661589] [2022-03-20 20:38:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:21,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410761306] [2022-03-20 20:38:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:38:21,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:21,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:21,662 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 20:38:21,665 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 20:38:21,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:38:21,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 20:38:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:38:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:38:22,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986661589] [2022-03-20 20:38:22,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:22,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410761306] [2022-03-20 20:38:22,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410761306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:22,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:22,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 20:38:22,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852070979] [2022-03-20 20:38:22,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852070979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:22,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:22,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:38:22,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036696325] [2022-03-20 20:38:22,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:22,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:38:22,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:22,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:38:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:38:22,206 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 20:38:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:22,418 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-20 20:38:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:38:22,418 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-03-20 20:38:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:22,422 INFO L225 Difference]: With dead ends: 131 [2022-03-20 20:38:22,422 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 20:38:22,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:38:22,424 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:22,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 210 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:38:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 20:38:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-20 20:38:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 20:38:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-03-20 20:38:22,443 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-03-20 20:38:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:22,443 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-03-20 20:38:22,443 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 20:38:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-03-20 20:38:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 20:38:22,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:22,446 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:22,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:22,659 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,SelfDestructingSolverStorable9 [2022-03-20 20:38:22,660 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-03-20 20:38:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78373330] [2022-03-20 20:38:22,661 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-03-20 20:38:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757552263] [2022-03-20 20:38:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:22,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:22,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735421003] [2022-03-20 20:38:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:22,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:22,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:22,677 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 20:38:22,696 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 20:38:22,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 20:38:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 20:38:23,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 20:38:23,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757552263] [2022-03-20 20:38:23,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735421003] [2022-03-20 20:38:23,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735421003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:23,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:23,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 20:38:23,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78373330] [2022-03-20 20:38:23,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78373330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:23,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:23,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:38:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075416089] [2022-03-20 20:38:23,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:23,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:38:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:38:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:38:23,214 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:38:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:23,391 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-03-20 20:38:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:38:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-03-20 20:38:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:23,392 INFO L225 Difference]: With dead ends: 160 [2022-03-20 20:38:23,392 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 20:38:23,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:38:23,393 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:23,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 166 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:38:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 20:38:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 20:38:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:38:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-03-20 20:38:23,407 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-03-20 20:38:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:23,407 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-03-20 20:38:23,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:38:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-03-20 20:38:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 20:38:23,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:23,408 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-20 20:38:23,428 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 20:38:23,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:23,609 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-03-20 20:38:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452926296] [2022-03-20 20:38:23,610 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-03-20 20:38:23,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:23,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925361043] [2022-03-20 20:38:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:23,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520226986] [2022-03-20 20:38:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:38:23,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:23,634 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 20:38:23,662 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 20:38:23,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:38:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:38:23,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:38:23,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:38:23,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925361043] [2022-03-20 20:38:23,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520226986] [2022-03-20 20:38:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520226986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:23,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:23,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 20:38:23,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452926296] [2022-03-20 20:38:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452926296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:23,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:23,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:38:23,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843350419] [2022-03-20 20:38:23,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:23,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:38:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:38:23,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:38:23,917 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:38:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:23,975 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-03-20 20:38:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:38:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-20 20:38:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:23,978 INFO L225 Difference]: With dead ends: 199 [2022-03-20 20:38:23,979 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 20:38:23,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:38:23,981 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:23,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 20:38:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 20:38:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:38:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-03-20 20:38:23,998 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-03-20 20:38:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:23,999 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-03-20 20:38:24,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:38:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-03-20 20:38:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 20:38:24,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:24,000 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:24,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:24,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 20:38:24,218 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-03-20 20:38:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622923529] [2022-03-20 20:38:24,219 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-03-20 20:38:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890466418] [2022-03-20 20:38:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:24,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:24,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134624502] [2022-03-20 20:38:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:24,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:24,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:24,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 20:38:24,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:38:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:38:24,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-20 20:38:24,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890466418] [2022-03-20 20:38:24,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134624502] [2022-03-20 20:38:24,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134624502] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:38:24,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:38:24,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 20:38:24,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622923529] [2022-03-20 20:38:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622923529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:24,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:38:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174898277] [2022-03-20 20:38:24,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:24,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:38:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:38:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:38:24,689 INFO L87 Difference]: Start difference. First operand 173 states and 215 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:38:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:24,727 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-03-20 20:38:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:38:24,728 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-03-20 20:38:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:24,729 INFO L225 Difference]: With dead ends: 179 [2022-03-20 20:38:24,729 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 20:38:24,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:38:24,730 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:24,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 20:38:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-03-20 20:38:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 20:38:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-03-20 20:38:24,747 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-03-20 20:38:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:24,748 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-03-20 20:38:24,748 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:38:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-03-20 20:38:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 20:38:24,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:24,748 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:24,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:24,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 20:38:24,966 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-03-20 20:38:24,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2136163821] [2022-03-20 20:38:24,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-03-20 20:38:24,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266018158] [2022-03-20 20:38:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:24,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:24,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462410960] [2022-03-20 20:38:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:38:24,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:24,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:24,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 20:38:25,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:38:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 20:38:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 20:38:25,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 20:38:25,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266018158] [2022-03-20 20:38:25,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462410960] [2022-03-20 20:38:25,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462410960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:25,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:25,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 20:38:25,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:25,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2136163821] [2022-03-20 20:38:25,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2136163821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:25,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:25,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:38:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245169617] [2022-03-20 20:38:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:25,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:38:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:38:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:38:25,705 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:38:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:25,918 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-03-20 20:38:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:38:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-20 20:38:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:25,920 INFO L225 Difference]: With dead ends: 199 [2022-03-20 20:38:25,920 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 20:38:25,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:38:25,921 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:25,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 232 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:38:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 20:38:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-03-20 20:38:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 20:38:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-03-20 20:38:25,937 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-03-20 20:38:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:25,938 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-03-20 20:38:25,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:38:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-03-20 20:38:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 20:38:25,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:25,939 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:25,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:26,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 20:38:26,153 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-03-20 20:38:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510286410] [2022-03-20 20:38:26,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-03-20 20:38:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865743100] [2022-03-20 20:38:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:26,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904468781] [2022-03-20 20:38:26,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:38:26,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:26,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:26,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 20:38:26,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:38:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 20:38:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 20:38:26,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 20:38:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865743100] [2022-03-20 20:38:26,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904468781] [2022-03-20 20:38:26,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904468781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:26,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:26,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-20 20:38:26,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510286410] [2022-03-20 20:38:26,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510286410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:26,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:26,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:38:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23222586] [2022-03-20 20:38:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:26,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:38:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:38:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:38:26,781 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:38:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:27,042 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-03-20 20:38:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:38:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-20 20:38:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:27,045 INFO L225 Difference]: With dead ends: 208 [2022-03-20 20:38:27,045 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 20:38:27,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:38:27,046 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:27,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 283 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:38:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 20:38:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-03-20 20:38:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 20:38:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-03-20 20:38:27,065 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-03-20 20:38:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:27,065 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-03-20 20:38:27,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:38:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-03-20 20:38:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 20:38:27,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:27,066 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-20 20:38:27,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:27,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 20:38:27,279 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-03-20 20:38:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567838964] [2022-03-20 20:38:27,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-03-20 20:38:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:27,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817649892] [2022-03-20 20:38:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:27,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:27,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587485512] [2022-03-20 20:38:27,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:38:27,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:27,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:27,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 20:38:27,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:38:27,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:27,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 20:38:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 20:38:27,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 20:38:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:27,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817649892] [2022-03-20 20:38:27,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587485512] [2022-03-20 20:38:27,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587485512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:27,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:27,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 20:38:27,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567838964] [2022-03-20 20:38:27,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567838964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:27,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:27,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:38:27,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883934355] [2022-03-20 20:38:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:27,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:38:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:38:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:38:27,810 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 20:38:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:28,011 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-03-20 20:38:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:38:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-03-20 20:38:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:28,013 INFO L225 Difference]: With dead ends: 214 [2022-03-20 20:38:28,013 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 20:38:28,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:38:28,014 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:28,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 286 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:38:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 20:38:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-03-20 20:38:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 20:38:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-03-20 20:38:28,034 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-03-20 20:38:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:28,034 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-03-20 20:38:28,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 20:38:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-03-20 20:38:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 20:38:28,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:28,036 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-20 20:38:28,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:28,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:28,256 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-03-20 20:38:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679494930] [2022-03-20 20:38:28,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-03-20 20:38:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598515557] [2022-03-20 20:38:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:28,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963588797] [2022-03-20 20:38:28,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:38:28,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:28,276 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:28,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 20:38:28,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:38:28,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:28,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 20:38:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 20:38:28,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 20:38:28,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598515557] [2022-03-20 20:38:28,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963588797] [2022-03-20 20:38:28,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963588797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:28,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:28,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 20:38:28,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679494930] [2022-03-20 20:38:28,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679494930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:28,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:28,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:38:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750502828] [2022-03-20 20:38:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:28,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:38:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:38:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:38:28,911 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:38:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:29,182 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-03-20 20:38:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:38:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-03-20 20:38:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:29,183 INFO L225 Difference]: With dead ends: 219 [2022-03-20 20:38:29,183 INFO L226 Difference]: Without dead ends: 210 [2022-03-20 20:38:29,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:38:29,184 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:29,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 243 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:38:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-20 20:38:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-03-20 20:38:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 20:38:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-03-20 20:38:29,204 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-03-20 20:38:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:29,204 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-03-20 20:38:29,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:38:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-03-20 20:38:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 20:38:29,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:29,205 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:29,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:29,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 20:38:29,423 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-03-20 20:38:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760164030] [2022-03-20 20:38:29,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-03-20 20:38:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806170122] [2022-03-20 20:38:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:29,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002576024] [2022-03-20 20:38:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:38:29,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:29,434 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:29,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 20:38:29,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 20:38:29,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:38:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 20:38:29,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 20:38:29,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806170122] [2022-03-20 20:38:29,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002576024] [2022-03-20 20:38:29,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002576024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:29,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:29,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 20:38:29,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:29,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760164030] [2022-03-20 20:38:29,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760164030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:29,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:29,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:38:29,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955567777] [2022-03-20 20:38:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:29,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:38:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:29,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:38:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:38:29,795 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:38:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:29,868 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-03-20 20:38:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:38:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-03-20 20:38:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:29,870 INFO L225 Difference]: With dead ends: 277 [2022-03-20 20:38:29,870 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 20:38:29,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:38:29,871 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:29,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:38:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 20:38:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-03-20 20:38:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 20:38:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-03-20 20:38:29,890 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-03-20 20:38:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:29,890 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-03-20 20:38:29,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:38:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-03-20 20:38:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:38:29,891 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:29,891 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:29,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:30,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 20:38:30,110 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-03-20 20:38:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:30,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335263982] [2022-03-20 20:38:30,111 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-03-20 20:38:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:30,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759419945] [2022-03-20 20:38:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:30,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171218267] [2022-03-20 20:38:30,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:30,124 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:30,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 20:38:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 20:38:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 20:38:30,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 20:38:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759419945] [2022-03-20 20:38:31,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171218267] [2022-03-20 20:38:31,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171218267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:31,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:31,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 20:38:31,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335263982] [2022-03-20 20:38:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335263982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:31,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:31,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:38:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877488503] [2022-03-20 20:38:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:31,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:38:31,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:38:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:38:31,039 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:38:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:31,371 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-03-20 20:38:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:38:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-20 20:38:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:31,373 INFO L225 Difference]: With dead ends: 256 [2022-03-20 20:38:31,373 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 20:38:31,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:38:31,374 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:31,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 300 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:38:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 20:38:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-03-20 20:38:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:38:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-03-20 20:38:31,396 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-03-20 20:38:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:31,397 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-03-20 20:38:31,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:38:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-03-20 20:38:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:38:31,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:31,398 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:31,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:31,632 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:31,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-03-20 20:38:31,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:31,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222212676] [2022-03-20 20:38:31,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:31,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-03-20 20:38:31,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:31,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038587296] [2022-03-20 20:38:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:31,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798778353] [2022-03-20 20:38:31,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:38:31,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:31,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:31,642 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:31,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 20:38:31,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:38:31,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 20:38:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 20:38:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 20:38:32,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038587296] [2022-03-20 20:38:32,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798778353] [2022-03-20 20:38:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798778353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:32,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:32,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 20:38:32,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222212676] [2022-03-20 20:38:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222212676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:32,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:32,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:38:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556983162] [2022-03-20 20:38:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:32,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:38:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:38:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:38:32,546 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:38:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:32,740 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-03-20 20:38:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:38:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-20 20:38:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:32,762 INFO L225 Difference]: With dead ends: 286 [2022-03-20 20:38:32,762 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 20:38:32,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:38:32,762 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:32,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 352 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:38:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 20:38:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-03-20 20:38:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 20:38:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-03-20 20:38:32,787 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-03-20 20:38:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:32,787 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-03-20 20:38:32,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:38:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-03-20 20:38:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:38:32,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:32,788 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:32,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:33,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:33,005 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-03-20 20:38:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925551188] [2022-03-20 20:38:33,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-03-20 20:38:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315454468] [2022-03-20 20:38:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:33,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:33,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580069693] [2022-03-20 20:38:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:38:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:33,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:33,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 20:38:33,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:38:33,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 20:38:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 41 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 20:38:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-20 20:38:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315454468] [2022-03-20 20:38:34,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580069693] [2022-03-20 20:38:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580069693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:38:34,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:38:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-20 20:38:34,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925551188] [2022-03-20 20:38:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925551188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:34,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:38:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497459837] [2022-03-20 20:38:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:34,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:38:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:38:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:38:34,166 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 20:38:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:38:34,890 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-03-20 20:38:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:38:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 85 [2022-03-20 20:38:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:38:34,892 INFO L225 Difference]: With dead ends: 297 [2022-03-20 20:38:34,892 INFO L226 Difference]: Without dead ends: 295 [2022-03-20 20:38:34,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:38:34,893 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:38:34,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 357 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 364 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-03-20 20:38:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-20 20:38:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-03-20 20:38:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 20:38:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-03-20 20:38:34,951 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-03-20 20:38:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:38:34,951 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-03-20 20:38:34,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 20:38:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-03-20 20:38:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:38:34,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:38:34,953 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:38:34,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 20:38:35,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:35,163 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:38:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:38:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-03-20 20:38:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:35,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620432525] [2022-03-20 20:38:35,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:38:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-03-20 20:38:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:38:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361397991] [2022-03-20 20:38:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:38:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:38:35,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:38:35,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781438636] [2022-03-20 20:38:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:38:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:38:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:38:35,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:38:35,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 20:38:35,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:38:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:38:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 20:38:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:38:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-20 20:38:35,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:38:35,733 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:38:35,735 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:38:56,969 WARN L232 SmtUtils]: Spent 10.97s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:38:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:38:56,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361397991] [2022-03-20 20:38:56,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:38:56,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781438636] [2022-03-20 20:38:56,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781438636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:38:56,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:38:56,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 20:38:56,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:38:56,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620432525] [2022-03-20 20:38:56,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620432525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:38:56,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:38:56,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:38:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478487330] [2022-03-20 20:38:56,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:38:56,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:38:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:38:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:38:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=160, Unknown=3, NotChecked=0, Total=210 [2022-03-20 20:38:56,972 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:39:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:01,480 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-03-20 20:39:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:39:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-03-20 20:39:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:01,482 INFO L225 Difference]: With dead ends: 315 [2022-03-20 20:39:01,483 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 20:39:01,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=67, Invalid=234, Unknown=5, NotChecked=0, Total=306 [2022-03-20 20:39:01,483 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:01,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 297 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:39:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 20:39:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-03-20 20:39:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 20:39:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-03-20 20:39:01,513 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-03-20 20:39:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:01,513 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-03-20 20:39:01,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:39:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-03-20 20:39:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 20:39:01,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:01,514 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:01,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:01,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 20:39:01,715 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-03-20 20:39:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574494055] [2022-03-20 20:39:01,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-03-20 20:39:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936513798] [2022-03-20 20:39:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:01,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:01,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016326548] [2022-03-20 20:39:01,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:39:01,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:01,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:01,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 20:39:01,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:39:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 20:39:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 20:39:02,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 20:39:02,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936513798] [2022-03-20 20:39:02,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016326548] [2022-03-20 20:39:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016326548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:02,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:02,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:39:02,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574494055] [2022-03-20 20:39:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574494055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:02,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:02,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:39:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412388141] [2022-03-20 20:39:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:02,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:39:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:39:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:39:02,979 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 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 20:39:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:03,275 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-03-20 20:39:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:39:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 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 90 [2022-03-20 20:39:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:03,277 INFO L225 Difference]: With dead ends: 291 [2022-03-20 20:39:03,277 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 20:39:03,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:39:03,277 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:03,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 386 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:39:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 20:39:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-03-20 20:39:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 20:39:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-03-20 20:39:03,309 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-03-20 20:39:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:03,310 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-03-20 20:39:03,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 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 20:39:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-03-20 20:39:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 20:39:03,310 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:03,311 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:03,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:03,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 20:39:03,523 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-03-20 20:39:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:03,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1315250387] [2022-03-20 20:39:03,526 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-03-20 20:39:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:03,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490270358] [2022-03-20 20:39:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:03,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805711590] [2022-03-20 20:39:03,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:39:03,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:03,535 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:03,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 20:39:03,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:39:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 20:39:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 62 proven. 50 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 20:39:05,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 20:39:05,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490270358] [2022-03-20 20:39:05,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:05,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805711590] [2022-03-20 20:39:05,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805711590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:05,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:05,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 20:39:05,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:05,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1315250387] [2022-03-20 20:39:05,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1315250387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:05,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:05,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:39:05,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848451454] [2022-03-20 20:39:05,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:05,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:39:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:39:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:39:05,294 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 20:39:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:06,734 INFO L93 Difference]: Finished difference Result 302 states and 371 transitions. [2022-03-20 20:39:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:39:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-03-20 20:39:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:06,736 INFO L225 Difference]: With dead ends: 302 [2022-03-20 20:39:06,737 INFO L226 Difference]: Without dead ends: 296 [2022-03-20 20:39:06,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:39:06,737 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:06,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 303 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 20:39:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-20 20:39:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 276. [2022-03-20 20:39:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 182 states have internal predecessors, (198), 68 states have call successors, (68), 35 states have call predecessors, (68), 34 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 20:39:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 330 transitions. [2022-03-20 20:39:06,784 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 330 transitions. Word has length 90 [2022-03-20 20:39:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:06,784 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 330 transitions. [2022-03-20 20:39:06,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 20:39:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 330 transitions. [2022-03-20 20:39:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 20:39:06,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:06,785 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:06,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:07,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:07,002 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-03-20 20:39:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026031158] [2022-03-20 20:39:07,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-03-20 20:39:07,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696013440] [2022-03-20 20:39:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:07,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:07,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:07,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605431972] [2022-03-20 20:39:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:39:07,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:07,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:07,012 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:07,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 20:39:07,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:39:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 20:39:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-20 20:39:09,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 20:39:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696013440] [2022-03-20 20:39:13,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605431972] [2022-03-20 20:39:13,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605431972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:13,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:13,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 20:39:13,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:13,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026031158] [2022-03-20 20:39:13,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026031158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:13,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:13,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:39:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236831455] [2022-03-20 20:39:13,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:13,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:39:13,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:39:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-03-20 20:39:13,570 INFO L87 Difference]: Start difference. First operand 276 states and 330 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:39:17,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:39:19,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:39:21,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:39:25,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:39:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:26,994 INFO L93 Difference]: Finished difference Result 334 states and 422 transitions. [2022-03-20 20:39:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:39:26,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-03-20 20:39:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:26,997 INFO L225 Difference]: With dead ends: 334 [2022-03-20 20:39:26,997 INFO L226 Difference]: Without dead ends: 318 [2022-03-20 20:39:26,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-03-20 20:39:26,998 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:26,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 334 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 360 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2022-03-20 20:39:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-20 20:39:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2022-03-20 20:39:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 195 states have (on average 1.1692307692307693) internal successors, (228), 202 states have internal predecessors, (228), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-20 20:39:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2022-03-20 20:39:27,095 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 90 [2022-03-20 20:39:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:27,096 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2022-03-20 20:39:27,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:39:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2022-03-20 20:39:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 20:39:27,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:27,097 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:27,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:27,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:27,300 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-03-20 20:39:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260558479] [2022-03-20 20:39:27,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-03-20 20:39:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:27,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493131959] [2022-03-20 20:39:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:27,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:27,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457794741] [2022-03-20 20:39:27,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:39:27,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:27,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:27,307 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:27,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 20:39:27,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:39:27,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:39:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:39:27,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 20:39:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493131959] [2022-03-20 20:39:27,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457794741] [2022-03-20 20:39:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457794741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:27,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:27,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 20:39:27,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260558479] [2022-03-20 20:39:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260558479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:27,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:27,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:39:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462189608] [2022-03-20 20:39:27,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:27,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:39:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:39:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:39:27,644 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:39:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:27,767 INFO L93 Difference]: Finished difference Result 398 states and 478 transitions. [2022-03-20 20:39:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:39:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-03-20 20:39:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:27,769 INFO L225 Difference]: With dead ends: 398 [2022-03-20 20:39:27,769 INFO L226 Difference]: Without dead ends: 375 [2022-03-20 20:39:27,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:39:27,770 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:27,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 160 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:39:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-20 20:39:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 360. [2022-03-20 20:39:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 234 states have (on average 1.1367521367521367) internal successors, (266), 242 states have internal predecessors, (266), 81 states have call successors, (81), 45 states have call predecessors, (81), 44 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 20:39:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 424 transitions. [2022-03-20 20:39:27,822 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 424 transitions. Word has length 99 [2022-03-20 20:39:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:27,822 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 424 transitions. [2022-03-20 20:39:27,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:39:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 424 transitions. [2022-03-20 20:39:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:27,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:27,823 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:27,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:28,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 20:39:28,039 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-03-20 20:39:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1054906617] [2022-03-20 20:39:28,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-03-20 20:39:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839633332] [2022-03-20 20:39:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:28,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:28,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954034410] [2022-03-20 20:39:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:39:28,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:28,068 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:28,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 20:39:28,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:39:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 20:39:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 20:39:29,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-20 20:39:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839633332] [2022-03-20 20:39:30,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954034410] [2022-03-20 20:39:30,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954034410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:30,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:30,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-20 20:39:30,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1054906617] [2022-03-20 20:39:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1054906617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:30,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:30,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:39:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140399891] [2022-03-20 20:39:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:30,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:39:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:39:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:39:30,211 INFO L87 Difference]: Start difference. First operand 360 states and 424 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:30,917 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2022-03-20 20:39:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:39:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 20:39:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:30,919 INFO L225 Difference]: With dead ends: 387 [2022-03-20 20:39:30,920 INFO L226 Difference]: Without dead ends: 385 [2022-03-20 20:39:30,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:39:30,920 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:30,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 415 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:39:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-20 20:39:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 380. [2022-03-20 20:39:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 246 states have (on average 1.146341463414634) internal successors, (282), 254 states have internal predecessors, (282), 87 states have call successors, (87), 47 states have call predecessors, (87), 46 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:39:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 452 transitions. [2022-03-20 20:39:31,007 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 452 transitions. Word has length 104 [2022-03-20 20:39:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:31,007 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 452 transitions. [2022-03-20 20:39:31,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 452 transitions. [2022-03-20 20:39:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:31,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:31,008 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:31,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:31,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 20:39:31,225 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-03-20 20:39:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:31,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423501197] [2022-03-20 20:39:31,226 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-03-20 20:39:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:31,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352725331] [2022-03-20 20:39:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:31,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:31,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:31,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352584419] [2022-03-20 20:39:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:39:31,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:31,234 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:31,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 20:39:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:39:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 20:39:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 20:39:32,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 20:39:33,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352725331] [2022-03-20 20:39:33,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352584419] [2022-03-20 20:39:33,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352584419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:33,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:33,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 20:39:33,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423501197] [2022-03-20 20:39:33,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423501197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:33,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:33,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:39:33,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550572456] [2022-03-20 20:39:33,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:33,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:39:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:39:33,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:39:33,318 INFO L87 Difference]: Start difference. First operand 380 states and 452 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 20:39:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:33,742 INFO L93 Difference]: Finished difference Result 428 states and 513 transitions. [2022-03-20 20:39:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:39:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-20 20:39:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:33,745 INFO L225 Difference]: With dead ends: 428 [2022-03-20 20:39:33,745 INFO L226 Difference]: Without dead ends: 426 [2022-03-20 20:39:33,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:39:33,745 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 10 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:33,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 486 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:39:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-20 20:39:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 410. [2022-03-20 20:39:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 274 states have internal predecessors, (304), 93 states have call successors, (93), 51 states have call predecessors, (93), 50 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 20:39:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 486 transitions. [2022-03-20 20:39:33,810 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 486 transitions. Word has length 104 [2022-03-20 20:39:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:33,810 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 486 transitions. [2022-03-20 20:39:33,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 20:39:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 486 transitions. [2022-03-20 20:39:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:33,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:33,813 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:33,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:34,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 20:39:34,028 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-03-20 20:39:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443271105] [2022-03-20 20:39:34,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-03-20 20:39:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561326138] [2022-03-20 20:39:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:34,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582070068] [2022-03-20 20:39:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:39:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:34,037 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:34,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 20:39:34,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:39:34,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 20:39:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 85 proven. 110 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-03-20 20:39:34,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 20:39:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561326138] [2022-03-20 20:39:35,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:35,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582070068] [2022-03-20 20:39:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582070068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-20 20:39:35,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:35,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443271105] [2022-03-20 20:39:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443271105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:35,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:39:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424093636] [2022-03-20 20:39:35,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:35,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:39:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:39:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:39:35,246 INFO L87 Difference]: Start difference. First operand 410 states and 486 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:35,760 INFO L93 Difference]: Finished difference Result 465 states and 548 transitions. [2022-03-20 20:39:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:39:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 20:39:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:35,763 INFO L225 Difference]: With dead ends: 465 [2022-03-20 20:39:35,763 INFO L226 Difference]: Without dead ends: 463 [2022-03-20 20:39:35,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:39:35,764 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 31 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:35,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 355 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:39:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-20 20:39:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 417. [2022-03-20 20:39:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 273 states have (on average 1.1391941391941391) internal successors, (311), 280 states have internal predecessors, (311), 90 states have call successors, (90), 54 states have call predecessors, (90), 53 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-20 20:39:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 487 transitions. [2022-03-20 20:39:35,833 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 487 transitions. Word has length 104 [2022-03-20 20:39:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:35,833 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 487 transitions. [2022-03-20 20:39:35,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 487 transitions. [2022-03-20 20:39:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:35,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:35,834 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:35,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:36,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 20:39:36,055 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-03-20 20:39:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:36,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1150809587] [2022-03-20 20:39:36,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:36,056 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-03-20 20:39:36,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544225609] [2022-03-20 20:39:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:36,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514180202] [2022-03-20 20:39:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:39:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:36,070 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:36,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 20:39:36,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 20:39:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 20:39:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 20:39:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:39,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544225609] [2022-03-20 20:39:39,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514180202] [2022-03-20 20:39:39,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514180202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:39:39,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:39:39,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 20:39:39,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1150809587] [2022-03-20 20:39:39,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1150809587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:39,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:39,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:39:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49332693] [2022-03-20 20:39:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:39,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:39:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:39:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:39:39,536 INFO L87 Difference]: Start difference. First operand 417 states and 487 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:39:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:44,363 INFO L93 Difference]: Finished difference Result 509 states and 621 transitions. [2022-03-20 20:39:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:39:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-03-20 20:39:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:44,365 INFO L225 Difference]: With dead ends: 509 [2022-03-20 20:39:44,365 INFO L226 Difference]: Without dead ends: 503 [2022-03-20 20:39:44,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:39:44,366 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 40 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:44,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 498 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 20:39:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-03-20 20:39:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 471. [2022-03-20 20:39:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 307 states have (on average 1.1498371335504887) internal successors, (353), 315 states have internal predecessors, (353), 105 states have call successors, (105), 59 states have call predecessors, (105), 58 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 20:39:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 559 transitions. [2022-03-20 20:39:44,467 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 559 transitions. Word has length 104 [2022-03-20 20:39:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:44,467 INFO L478 AbstractCegarLoop]: Abstraction has 471 states and 559 transitions. [2022-03-20 20:39:44,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:39:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 559 transitions. [2022-03-20 20:39:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:44,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:44,468 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:44,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 20:39:44,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:44,675 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-03-20 20:39:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:44,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398636102] [2022-03-20 20:39:44,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-03-20 20:39:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549231187] [2022-03-20 20:39:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:44,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799903559] [2022-03-20 20:39:44,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:39:44,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:44,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:44,685 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:44,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 20:39:44,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:39:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 20:39:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 20:39:46,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-20 20:39:47,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549231187] [2022-03-20 20:39:47,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799903559] [2022-03-20 20:39:47,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799903559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:47,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:47,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-03-20 20:39:47,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398636102] [2022-03-20 20:39:47,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398636102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:47,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:47,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:39:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919010646] [2022-03-20 20:39:47,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:47,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:39:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:39:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:39:47,257 INFO L87 Difference]: Start difference. First operand 471 states and 559 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:48,440 INFO L93 Difference]: Finished difference Result 500 states and 600 transitions. [2022-03-20 20:39:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:39:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 20:39:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:48,443 INFO L225 Difference]: With dead ends: 500 [2022-03-20 20:39:48,443 INFO L226 Difference]: Without dead ends: 498 [2022-03-20 20:39:48,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:39:48,444 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:48,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 520 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 512 Invalid, 0 Unknown, 74 Unchecked, 1.0s Time] [2022-03-20 20:39:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-03-20 20:39:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2022-03-20 20:39:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 307 states have (on average 1.1498371335504887) internal successors, (353), 315 states have internal predecessors, (353), 105 states have call successors, (105), 59 states have call predecessors, (105), 58 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 20:39:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 559 transitions. [2022-03-20 20:39:48,571 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 559 transitions. Word has length 104 [2022-03-20 20:39:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:48,572 INFO L478 AbstractCegarLoop]: Abstraction has 471 states and 559 transitions. [2022-03-20 20:39:48,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 559 transitions. [2022-03-20 20:39:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:48,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:48,573 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:48,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:48,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:48,801 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-03-20 20:39:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37074898] [2022-03-20 20:39:48,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-03-20 20:39:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789698064] [2022-03-20 20:39:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:48,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:48,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:48,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662125057] [2022-03-20 20:39:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:39:48,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:48,808 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:48,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 20:39:48,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:39:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 20:39:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-03-20 20:39:49,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 100 proven. 45 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 20:39:50,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:50,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789698064] [2022-03-20 20:39:50,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:50,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662125057] [2022-03-20 20:39:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662125057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:50,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:50,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-20 20:39:50,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:50,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37074898] [2022-03-20 20:39:50,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37074898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:50,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:50,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:39:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128541442] [2022-03-20 20:39:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:50,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:39:50,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:39:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:39:50,331 INFO L87 Difference]: Start difference. First operand 471 states and 559 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:39:51,092 INFO L93 Difference]: Finished difference Result 502 states and 601 transitions. [2022-03-20 20:39:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:39:51,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 20:39:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:39:51,094 INFO L225 Difference]: With dead ends: 502 [2022-03-20 20:39:51,094 INFO L226 Difference]: Without dead ends: 500 [2022-03-20 20:39:51,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:39:51,096 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:39:51,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 371 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:39:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-03-20 20:39:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 484. [2022-03-20 20:39:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 315 states have (on average 1.1492063492063491) internal successors, (362), 323 states have internal predecessors, (362), 108 states have call successors, (108), 61 states have call predecessors, (108), 60 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-03-20 20:39:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 574 transitions. [2022-03-20 20:39:51,192 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 574 transitions. Word has length 104 [2022-03-20 20:39:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:39:51,192 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 574 transitions. [2022-03-20 20:39:51,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 20:39:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 574 transitions. [2022-03-20 20:39:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:39:51,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:39:51,193 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:39:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 20:39:51,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 20:39:51,408 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:39:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:39:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-03-20 20:39:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:51,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955235963] [2022-03-20 20:39:51,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:39:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-03-20 20:39:51,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:39:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406866414] [2022-03-20 20:39:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:39:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:39:51,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:39:51,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880143105] [2022-03-20 20:39:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:39:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:39:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:39:51,416 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:39:51,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 20:39:51,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:39:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:39:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 20:39:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:39:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 20:39:52,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:39:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-03-20 20:39:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:39:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406866414] [2022-03-20 20:39:59,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:39:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880143105] [2022-03-20 20:39:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880143105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:39:59,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:39:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-20 20:39:59,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:39:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955235963] [2022-03-20 20:39:59,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955235963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:39:59,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:39:59,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:39:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209041138] [2022-03-20 20:39:59,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:39:59,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:39:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:39:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:39:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-03-20 20:39:59,181 INFO L87 Difference]: Start difference. First operand 484 states and 574 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 20:40:01,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:40:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:02,504 INFO L93 Difference]: Finished difference Result 563 states and 685 transitions. [2022-03-20 20:40:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:40:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-03-20 20:40:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:02,507 INFO L225 Difference]: With dead ends: 563 [2022-03-20 20:40:02,508 INFO L226 Difference]: Without dead ends: 561 [2022-03-20 20:40:02,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-03-20 20:40:02,508 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:02,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 310 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 20:40:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-20 20:40:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 509. [2022-03-20 20:40:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 330 states have (on average 1.1454545454545455) internal successors, (378), 341 states have internal predecessors, (378), 115 states have call successors, (115), 64 states have call predecessors, (115), 63 states have return successors, (111), 103 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 20:40:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 604 transitions. [2022-03-20 20:40:02,630 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 604 transitions. Word has length 104 [2022-03-20 20:40:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:02,630 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 604 transitions. [2022-03-20 20:40:02,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 20:40:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 604 transitions. [2022-03-20 20:40:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:40:02,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:02,632 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:02,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:02,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:02,838 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-03-20 20:40:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38564976] [2022-03-20 20:40:02,839 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-03-20 20:40:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979814925] [2022-03-20 20:40:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:02,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:02,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:02,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573452209] [2022-03-20 20:40:02,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:40:02,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:02,848 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:02,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 20:40:02,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:40:02,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 20:40:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 20:40:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 20:40:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979814925] [2022-03-20 20:40:03,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573452209] [2022-03-20 20:40:03,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573452209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:03,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:03,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:40:03,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38564976] [2022-03-20 20:40:03,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38564976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:03,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:03,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:40:03,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794082862] [2022-03-20 20:40:03,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:03,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:40:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:40:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:40:03,562 INFO L87 Difference]: Start difference. First operand 509 states and 604 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 20:40:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:03,845 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2022-03-20 20:40:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:40:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-20 20:40:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:03,848 INFO L225 Difference]: With dead ends: 535 [2022-03-20 20:40:03,848 INFO L226 Difference]: Without dead ends: 529 [2022-03-20 20:40:03,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:40:03,849 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:03,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 424 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:40:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-20 20:40:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-03-20 20:40:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 341 states have (on average 1.1495601173020529) internal successors, (392), 352 states have internal predecessors, (392), 121 states have call successors, (121), 65 states have call predecessors, (121), 64 states have return successors, (117), 109 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-20 20:40:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 630 transitions. [2022-03-20 20:40:03,974 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 630 transitions. Word has length 109 [2022-03-20 20:40:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:03,974 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 630 transitions. [2022-03-20 20:40:03,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 20:40:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 630 transitions. [2022-03-20 20:40:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:40:03,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:03,975 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:03,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:04,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:04,193 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:04,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-03-20 20:40:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:04,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756736719] [2022-03-20 20:40:04,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-03-20 20:40:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:04,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36505355] [2022-03-20 20:40:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:04,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:04,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277734133] [2022-03-20 20:40:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:40:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:04,200 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:04,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 20:40:04,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:40:04,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 20:40:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 84 proven. 129 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-20 20:40:05,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 129 proven. 16 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-03-20 20:40:06,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36505355] [2022-03-20 20:40:06,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277734133] [2022-03-20 20:40:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277734133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:06,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:06,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-20 20:40:06,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756736719] [2022-03-20 20:40:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756736719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:06,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:06,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:40:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993747428] [2022-03-20 20:40:06,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:06,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:40:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:40:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:40:06,051 INFO L87 Difference]: Start difference. First operand 527 states and 630 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 20:40:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:07,905 INFO L93 Difference]: Finished difference Result 575 states and 693 transitions. [2022-03-20 20:40:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:40:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 109 [2022-03-20 20:40:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:07,908 INFO L225 Difference]: With dead ends: 575 [2022-03-20 20:40:07,908 INFO L226 Difference]: Without dead ends: 565 [2022-03-20 20:40:07,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:40:07,924 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 40 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:07,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 430 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 20:40:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-20 20:40:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 544. [2022-03-20 20:40:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 354 states have (on average 1.1468926553672316) internal successors, (406), 365 states have internal predecessors, (406), 122 states have call successors, (122), 68 states have call predecessors, (122), 67 states have return successors, (118), 110 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-20 20:40:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 646 transitions. [2022-03-20 20:40:08,064 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 646 transitions. Word has length 109 [2022-03-20 20:40:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:08,064 INFO L478 AbstractCegarLoop]: Abstraction has 544 states and 646 transitions. [2022-03-20 20:40:08,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 20:40:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 646 transitions. [2022-03-20 20:40:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:40:08,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:08,065 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:08,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:08,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 20:40:08,273 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-03-20 20:40:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [648479641] [2022-03-20 20:40:08,274 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-03-20 20:40:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241252797] [2022-03-20 20:40:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:08,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:08,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174444443] [2022-03-20 20:40:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:40:08,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:08,281 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:08,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 20:40:09,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:40:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 20:40:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-20 20:40:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-20 20:40:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241252797] [2022-03-20 20:40:09,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174444443] [2022-03-20 20:40:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174444443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:09,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:09,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 20:40:09,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:09,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [648479641] [2022-03-20 20:40:09,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [648479641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:09,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:09,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:40:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367119896] [2022-03-20 20:40:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:09,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:40:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:40:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:40:09,621 INFO L87 Difference]: Start difference. First operand 544 states and 646 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:40:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:09,920 INFO L93 Difference]: Finished difference Result 554 states and 654 transitions. [2022-03-20 20:40:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:40:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-03-20 20:40:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:09,923 INFO L225 Difference]: With dead ends: 554 [2022-03-20 20:40:09,923 INFO L226 Difference]: Without dead ends: 533 [2022-03-20 20:40:09,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:40:09,924 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:09,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 168 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-20 20:40:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 490. [2022-03-20 20:40:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 326 states have (on average 1.1196319018404908) internal successors, (365), 337 states have internal predecessors, (365), 99 states have call successors, (99), 65 states have call predecessors, (99), 64 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 20:40:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 560 transitions. [2022-03-20 20:40:10,040 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 560 transitions. Word has length 109 [2022-03-20 20:40:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:10,041 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 560 transitions. [2022-03-20 20:40:10,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 20:40:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 560 transitions. [2022-03-20 20:40:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 20:40:10,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:10,042 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:10,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:10,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 20:40:10,249 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-03-20 20:40:10,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:10,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057398268] [2022-03-20 20:40:10,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-03-20 20:40:10,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:10,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148448029] [2022-03-20 20:40:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:10,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973834332] [2022-03-20 20:40:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:40:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:10,258 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:10,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 20:40:10,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:40:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:40:10,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:40:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 20:40:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148448029] [2022-03-20 20:40:10,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973834332] [2022-03-20 20:40:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973834332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:10,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:10,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:40:10,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057398268] [2022-03-20 20:40:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057398268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:10,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:10,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:40:10,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569602825] [2022-03-20 20:40:10,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:10,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:40:10,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:40:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:40:10,735 INFO L87 Difference]: Start difference. First operand 490 states and 560 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:40:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:11,000 INFO L93 Difference]: Finished difference Result 629 states and 731 transitions. [2022-03-20 20:40:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:40:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-03-20 20:40:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:11,003 INFO L225 Difference]: With dead ends: 629 [2022-03-20 20:40:11,003 INFO L226 Difference]: Without dead ends: 620 [2022-03-20 20:40:11,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:40:11,004 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:11,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-03-20 20:40:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 604. [2022-03-20 20:40:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 407 states have (on average 1.1203931203931203) internal successors, (456), 413 states have internal predecessors, (456), 119 states have call successors, (119), 78 states have call predecessors, (119), 77 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-03-20 20:40:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 691 transitions. [2022-03-20 20:40:11,149 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 691 transitions. Word has length 118 [2022-03-20 20:40:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:11,150 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 691 transitions. [2022-03-20 20:40:11,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:40:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 691 transitions. [2022-03-20 20:40:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 20:40:11,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:11,151 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:11,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:11,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 20:40:11,369 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-03-20 20:40:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:11,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355688467] [2022-03-20 20:40:11,370 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-03-20 20:40:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:11,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554122219] [2022-03-20 20:40:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:11,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:11,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:11,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232639749] [2022-03-20 20:40:11,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:40:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:11,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:11,377 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:11,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 20:40:11,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 20:40:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:40:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 20:40:11,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 20:40:11,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:11,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554122219] [2022-03-20 20:40:11,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:11,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232639749] [2022-03-20 20:40:11,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232639749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:11,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:11,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 20:40:11,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:11,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355688467] [2022-03-20 20:40:11,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355688467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:11,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:11,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:40:11,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918236935] [2022-03-20 20:40:11,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:11,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:40:11,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:40:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:40:11,886 INFO L87 Difference]: Start difference. First operand 604 states and 691 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:40:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:12,169 INFO L93 Difference]: Finished difference Result 749 states and 879 transitions. [2022-03-20 20:40:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:40:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-03-20 20:40:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:12,172 INFO L225 Difference]: With dead ends: 749 [2022-03-20 20:40:12,172 INFO L226 Difference]: Without dead ends: 740 [2022-03-20 20:40:12,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:40:12,173 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:12,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 174 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-20 20:40:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 738. [2022-03-20 20:40:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 493 states have (on average 1.1196754563894524) internal successors, (552), 501 states have internal predecessors, (552), 153 states have call successors, (153), 92 states have call predecessors, (153), 91 states have return successors, (150), 144 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 20:40:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 855 transitions. [2022-03-20 20:40:12,354 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 855 transitions. Word has length 137 [2022-03-20 20:40:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:12,355 INFO L478 AbstractCegarLoop]: Abstraction has 738 states and 855 transitions. [2022-03-20 20:40:12,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:40:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 855 transitions. [2022-03-20 20:40:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 20:40:12,356 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:12,357 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:12,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:12,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:12,575 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-03-20 20:40:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:12,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472022555] [2022-03-20 20:40:12,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-03-20 20:40:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652789157] [2022-03-20 20:40:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:12,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:12,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100493448] [2022-03-20 20:40:12,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:40:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:12,583 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:12,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 20:40:12,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:40:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:12,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:40:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:40:12,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 20:40:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:13,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652789157] [2022-03-20 20:40:13,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:13,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100493448] [2022-03-20 20:40:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100493448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:13,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:13,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-03-20 20:40:13,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:13,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472022555] [2022-03-20 20:40:13,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472022555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:13,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:13,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:40:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42778643] [2022-03-20 20:40:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:13,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:40:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:40:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:40:13,177 INFO L87 Difference]: Start difference. First operand 738 states and 855 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 20:40:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:13,499 INFO L93 Difference]: Finished difference Result 883 states and 1043 transitions. [2022-03-20 20:40:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:40:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-03-20 20:40:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:13,503 INFO L225 Difference]: With dead ends: 883 [2022-03-20 20:40:13,503 INFO L226 Difference]: Without dead ends: 874 [2022-03-20 20:40:13,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:40:13,503 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 31 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:13,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 196 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-20 20:40:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2022-03-20 20:40:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 579 states have (on average 1.1191709844559585) internal successors, (648), 589 states have internal predecessors, (648), 187 states have call successors, (187), 106 states have call predecessors, (187), 105 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-03-20 20:40:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1019 transitions. [2022-03-20 20:40:13,731 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1019 transitions. Word has length 156 [2022-03-20 20:40:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:13,731 INFO L478 AbstractCegarLoop]: Abstraction has 872 states and 1019 transitions. [2022-03-20 20:40:13,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 20:40:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1019 transitions. [2022-03-20 20:40:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 20:40:13,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:13,734 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:13,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:13,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 20:40:13,952 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-03-20 20:40:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661885488] [2022-03-20 20:40:13,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-03-20 20:40:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848816040] [2022-03-20 20:40:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:13,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:13,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486263391] [2022-03-20 20:40:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:40:13,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:13,960 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:13,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 20:40:14,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:40:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:40:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 20:40:14,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-20 20:40:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848816040] [2022-03-20 20:40:14,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486263391] [2022-03-20 20:40:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486263391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:14,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:14,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-03-20 20:40:14,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661885488] [2022-03-20 20:40:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661885488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:14,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:14,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:40:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079383284] [2022-03-20 20:40:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:14,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:40:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:40:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:40:14,561 INFO L87 Difference]: Start difference. First operand 872 states and 1019 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-20 20:40:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:14,960 INFO L93 Difference]: Finished difference Result 1017 states and 1207 transitions. [2022-03-20 20:40:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:40:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-03-20 20:40:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:14,964 INFO L225 Difference]: With dead ends: 1017 [2022-03-20 20:40:14,965 INFO L226 Difference]: Without dead ends: 1008 [2022-03-20 20:40:14,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:40:14,966 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 23 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:14,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 198 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-03-20 20:40:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2022-03-20 20:40:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 665 states have (on average 1.118796992481203) internal successors, (744), 677 states have internal predecessors, (744), 221 states have call successors, (221), 120 states have call predecessors, (221), 119 states have return successors, (218), 208 states have call predecessors, (218), 218 states have call successors, (218) [2022-03-20 20:40:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1183 transitions. [2022-03-20 20:40:15,230 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1183 transitions. Word has length 175 [2022-03-20 20:40:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:15,230 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1183 transitions. [2022-03-20 20:40:15,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-20 20:40:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1183 transitions. [2022-03-20 20:40:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 20:40:15,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:15,232 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:15,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:15,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 20:40:15,451 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-03-20 20:40:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763874673] [2022-03-20 20:40:15,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-03-20 20:40:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:15,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716228655] [2022-03-20 20:40:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:15,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:15,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976299253] [2022-03-20 20:40:15,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:40:15,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:15,459 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:15,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 20:40:15,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 20:40:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:40:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:40:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:40:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 20:40:15,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:40:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-20 20:40:16,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:40:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716228655] [2022-03-20 20:40:16,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:40:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976299253] [2022-03-20 20:40:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976299253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:40:16,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:40:16,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-03-20 20:40:16,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:40:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763874673] [2022-03-20 20:40:16,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763874673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:40:16,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:40:16,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:40:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116843424] [2022-03-20 20:40:16,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:40:16,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:40:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:40:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:40:16,219 INFO L87 Difference]: Start difference. First operand 1006 states and 1183 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 20:40:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:40:16,671 INFO L93 Difference]: Finished difference Result 1151 states and 1371 transitions. [2022-03-20 20:40:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 20:40:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-03-20 20:40:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:40:16,675 INFO L225 Difference]: With dead ends: 1151 [2022-03-20 20:40:16,675 INFO L226 Difference]: Without dead ends: 1142 [2022-03-20 20:40:16,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:40:16,676 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:40:16,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 220 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:40:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-20 20:40:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1140. [2022-03-20 20:40:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 751 states have (on average 1.118508655126498) internal successors, (840), 765 states have internal predecessors, (840), 255 states have call successors, (255), 134 states have call predecessors, (255), 133 states have return successors, (252), 240 states have call predecessors, (252), 252 states have call successors, (252) [2022-03-20 20:40:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1347 transitions. [2022-03-20 20:40:16,972 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1347 transitions. Word has length 194 [2022-03-20 20:40:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:40:16,972 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1347 transitions. [2022-03-20 20:40:16,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 20:40:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1347 transitions. [2022-03-20 20:40:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 20:40:16,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:40:16,975 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:40:16,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:17,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:17,182 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:40:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:40:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-03-20 20:40:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:40:17,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388078403] [2022-03-20 20:40:17,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:40:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-03-20 20:40:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:40:17,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371910797] [2022-03-20 20:40:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:40:17,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:40:17,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:40:17,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39557867] [2022-03-20 20:40:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:40:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:40:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:40:17,191 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:40:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 20:40:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:40:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 20:40:17,268 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 20:40:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 20:40:17,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 20:40:17,396 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 20:40:17,396 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 20:40:17,399 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 20:40:17,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 20:40:17,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 20:40:17,621 INFO L719 BasicCegarLoop]: Path program histogram: [36, 20, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 20:40:17,623 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 20:40:17,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:40:17 BoogieIcfgContainer [2022-03-20 20:40:17,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 20:40:17,645 INFO L158 Benchmark]: Toolchain (without parser) took 121000.46ms. Allocated memory was 209.7MB in the beginning and 464.5MB in the end (delta: 254.8MB). Free memory was 156.6MB in the beginning and 258.3MB in the end (delta: -101.7MB). Peak memory consumption was 153.1MB. Max. memory is 8.0GB. [2022-03-20 20:40:17,645 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:40:17,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.41ms. Allocated memory was 209.7MB in the beginning and 321.9MB in the end (delta: 112.2MB). Free memory was 156.3MB in the beginning and 293.4MB in the end (delta: -137.1MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. [2022-03-20 20:40:17,645 INFO L158 Benchmark]: Boogie Preprocessor took 40.57ms. Allocated memory is still 321.9MB. Free memory was 293.4MB in the beginning and 291.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 20:40:17,645 INFO L158 Benchmark]: RCFGBuilder took 277.32ms. Allocated memory is still 321.9MB. Free memory was 291.9MB in the beginning and 281.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 20:40:17,645 INFO L158 Benchmark]: TraceAbstraction took 120401.80ms. Allocated memory was 321.9MB in the beginning and 464.5MB in the end (delta: 142.6MB). Free memory was 280.8MB in the beginning and 258.3MB in the end (delta: 22.5MB). Peak memory consumption was 165.1MB. Max. memory is 8.0GB. [2022-03-20 20:40:17,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 209.7MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 274.41ms. Allocated memory was 209.7MB in the beginning and 321.9MB in the end (delta: 112.2MB). Free memory was 156.3MB in the beginning and 293.4MB in the end (delta: -137.1MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.57ms. Allocated memory is still 321.9MB. Free memory was 293.4MB in the beginning and 291.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 277.32ms. Allocated memory is still 321.9MB. Free memory was 291.9MB in the beginning and 281.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 120401.80ms. Allocated memory was 321.9MB in the beginning and 464.5MB in the end (delta: 142.6MB). Free memory was 280.8MB in the beginning and 258.3MB in the end (delta: 22.5MB). Peak memory consumption was 165.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<10) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 120.3s, OverallIterations: 42, TraceHistogramMax: 31, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.1s, AutomataDifference: 39.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 987 SdHoareTripleChecker+Valid, 29.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 762 mSDsluCounter, 10348 SdHoareTripleChecker+Invalid, 28.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 81 IncrementalHoareTripleChecker+Unchecked, 8487 mSDsCounter, 592 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9052 IncrementalHoareTripleChecker+Invalid, 9729 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 592 mSolverCounterUnsat, 1861 mSDtfsCounter, 9052 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6558 GetRequests, 5939 SyntacticMatches, 54 SemanticMatches, 565 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 42.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1140occurred in iteration=41, InterpolantAutomatonStates: 434, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 41 MinimizatonAttempts, 558 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 20:40:17,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...