/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:57:48,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:57:48,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:57:48,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:57:48,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 14:57:48,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 14:57:48,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 14:57:48,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 14:57:48,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 14:57:48,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 14:57:48,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 14:57:48,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 14:57:48,572 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 14:57:48,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 14:57:48,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 14:57:48,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 14:57:48,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 14:57:48,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 14:57:48,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:57:48,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:57:48,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:57:48,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:57:48,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:57:48,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:57:48,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:57:48,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:57:48,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:57:48,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:57:48,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:57:48,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:57:48,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:57:48,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:57:48,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:57:48,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:57:48,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:57:48,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:57:48,605 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:57:48,605 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:57:48,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:57:48,605 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:57:48,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:57:48,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:57:48,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:57:48,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:57:48,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:57:48,809 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:57:48,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-03-20 14:57:48,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a0a8a9c/e1fdb5ab1bef4497b8b4f1d59fc16e27/FLAG6f5b0fc19 [2022-03-20 14:57:49,194 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:57:49,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-03-20 14:57:49,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a0a8a9c/e1fdb5ab1bef4497b8b4f1d59fc16e27/FLAG6f5b0fc19 [2022-03-20 14:57:49,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a0a8a9c/e1fdb5ab1bef4497b8b4f1d59fc16e27 [2022-03-20 14:57:49,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:57:49,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:57:49,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:57:49,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:57:49,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:57:49,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b297f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49, skipping insertion in model container [2022-03-20 14:57:49,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:57:49,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:57:49,370 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/egcd2-ll_unwindbound20.c[490,503] [2022-03-20 14:57:49,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:57:49,391 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:57:49,401 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/egcd2-ll_unwindbound20.c[490,503] [2022-03-20 14:57:49,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:57:49,418 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:57:49,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49 WrapperNode [2022-03-20 14:57:49,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:57:49,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:57:49,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:57:49,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:57:49,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:57:49,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:57:49,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:57:49,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:57:49,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (1/1) ... [2022-03-20 14:57:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:57:49,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:49,468 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 14:57:49,483 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 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:57:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:57:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:57:49,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:57:49,559 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:57:49,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:57:49,696 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:57:49,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:57:49,701 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 14:57:49,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:57:49 BoogieIcfgContainer [2022-03-20 14:57:49,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:57:49,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:57:49,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:57:49,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:57:49,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:57:49" (1/3) ... [2022-03-20 14:57:49,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1225e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:57:49, skipping insertion in model container [2022-03-20 14:57:49,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:57:49" (2/3) ... [2022-03-20 14:57:49,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1225e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:57:49, skipping insertion in model container [2022-03-20 14:57:49,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:57:49" (3/3) ... [2022-03-20 14:57:49,709 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-03-20 14:57:49,712 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:57:49,712 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:57:49,784 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:57:49,790 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 14:57:49,790 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:57:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:57:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:57:49,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:49,828 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:49,829 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-03-20 14:57:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761681057] [2022-03-20 14:57:49,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times [2022-03-20 14:57:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:49,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608212906] [2022-03-20 14:57:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:57:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:57:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:57:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 14:57:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 14:57:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:57:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:57:50,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608212906] [2022-03-20 14:57:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608212906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:50,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:50,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:57:50,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761681057] [2022-03-20 14:57:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761681057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:50,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:50,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:57:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333963229] [2022-03-20 14:57:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:50,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:57:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:57:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:57:50,108 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:50,211 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-03-20 14:57:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:57:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 14:57:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:50,218 INFO L225 Difference]: With dead ends: 72 [2022-03-20 14:57:50,219 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:57:50,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:57:50,224 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:50,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:57:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:57:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 14:57:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:57:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-20 14:57:50,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-20 14:57:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:50,258 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-20 14:57:50,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-20 14:57:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:57:50,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:50,260 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:50,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:57:50,261 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-03-20 14:57:50,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:50,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183974873] [2022-03-20 14:57:50,263 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times [2022-03-20 14:57:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887600938] [2022-03-20 14:57:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:50,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:50,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371131723] [2022-03-20 14:57:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:50,283 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 14:57:50,312 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 14:57:50,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:57:50,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:57:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:57:50,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:57:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887600938] [2022-03-20 14:57:50,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371131723] [2022-03-20 14:57:50,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371131723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:50,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:50,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 14:57:50,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183974873] [2022-03-20 14:57:50,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183974873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:50,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:50,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 14:57:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729934733] [2022-03-20 14:57:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:50,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 14:57:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 14:57:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 14:57:50,536 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:50,567 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-03-20 14:57:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 14:57:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 14:57:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:50,570 INFO L225 Difference]: With dead ends: 44 [2022-03-20 14:57:50,571 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 14:57:50,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 14:57:50,574 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:50,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 14:57:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 14:57:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:57:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-20 14:57:50,593 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-20 14:57:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:50,596 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-20 14:57:50,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-20 14:57:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 14:57:50,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:50,599 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:50,622 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 14:57:50,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:50,812 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-03-20 14:57:50,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:50,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349790785] [2022-03-20 14:57:50,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times [2022-03-20 14:57:50,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:50,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600207303] [2022-03-20 14:57:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:50,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:50,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:50,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131123460] [2022-03-20 14:57:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:50,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:50,831 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 14:57:50,855 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 14:57:50,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:57:50,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:57:51,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:57:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:51,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600207303] [2022-03-20 14:57:51,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:51,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131123460] [2022-03-20 14:57:51,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131123460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:51,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:51,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 14:57:51,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349790785] [2022-03-20 14:57:51,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349790785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:51,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:51,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:57:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720210260] [2022-03-20 14:57:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:51,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:57:51,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:57:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:57:51,155 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:51,235 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-03-20 14:57:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:57:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 14:57:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:51,237 INFO L225 Difference]: With dead ends: 53 [2022-03-20 14:57:51,237 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 14:57:51,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:57:51,239 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:51,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 160 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 14:57:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-20 14:57:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:57:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 14:57:51,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-20 14:57:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:51,249 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 14:57:51,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 14:57:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 14:57:51,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:51,251 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:51,283 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 14:57:51,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 14:57:51,472 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-03-20 14:57:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2090118603] [2022-03-20 14:57:51,473 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:51,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times [2022-03-20 14:57:51,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:51,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993214812] [2022-03-20 14:57:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:51,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562347] [2022-03-20 14:57:51,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:51,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:51,490 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 14:57:51,491 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 14:57:51,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:57:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 14:57:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:57:51,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:57:51,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:51,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993214812] [2022-03-20 14:57:51,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:51,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562347] [2022-03-20 14:57:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:51,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:51,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:51,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2090118603] [2022-03-20 14:57:51,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2090118603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:51,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889685229] [2022-03-20 14:57:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:51,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:57:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:57:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:57:51,612 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 14:57:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:51,649 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-20 14:57:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:57:51,650 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), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-03-20 14:57:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:51,651 INFO L225 Difference]: With dead ends: 51 [2022-03-20 14:57:51,651 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 14:57:51,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 14:57:51,652 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:51,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 14:57:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-03-20 14:57:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:57:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-20 14:57:51,662 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2022-03-20 14:57:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:51,663 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-20 14:57:51,663 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), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 14:57:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-20 14:57:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 14:57:51,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:51,664 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:51,689 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 14:57:51,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:51,879 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-03-20 14:57:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:51,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840634555] [2022-03-20 14:57:51,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times [2022-03-20 14:57:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:51,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283682995] [2022-03-20 14:57:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:51,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:51,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414917700] [2022-03-20 14:57:51,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:51,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:51,892 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 14:57:51,907 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 14:57:51,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:51,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:57:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:57:52,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:57:52,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283682995] [2022-03-20 14:57:52,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:52,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414917700] [2022-03-20 14:57:52,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414917700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:52,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:52,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:52,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:52,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840634555] [2022-03-20 14:57:52,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840634555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:52,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:52,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334612936] [2022-03-20 14:57:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:52,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:57:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:57:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:57:52,041 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:52,086 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-03-20 14:57:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:57:52,087 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 14:57:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:52,091 INFO L225 Difference]: With dead ends: 72 [2022-03-20 14:57:52,091 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 14:57:52,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:57:52,093 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:52,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 14:57:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 14:57:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:57:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-20 14:57:52,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39 [2022-03-20 14:57:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:52,102 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-20 14:57:52,103 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:57:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-20 14:57:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:57:52,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:52,104 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:52,122 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 14:57:52,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:52,315 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-03-20 14:57:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:52,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390076576] [2022-03-20 14:57:52,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times [2022-03-20 14:57:52,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:52,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190117571] [2022-03-20 14:57:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:52,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:52,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:52,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117128067] [2022-03-20 14:57:52,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:52,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:52,328 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 14:57:52,341 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 14:57:52,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 14:57:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:57:52,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:57:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190117571] [2022-03-20 14:57:52,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117128067] [2022-03-20 14:57:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117128067] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:57:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:57:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 14:57:52,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390076576] [2022-03-20 14:57:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390076576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91480242] [2022-03-20 14:57:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:52,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:57:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:57:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:57:52,650 INFO L87 Difference]: Start difference. First operand 46 states and 58 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 14:57:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:52,684 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-03-20 14:57:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:57:52,685 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 41 [2022-03-20 14:57:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:52,686 INFO L225 Difference]: With dead ends: 61 [2022-03-20 14:57:52,686 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 14:57:52,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:57:52,687 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:52,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 14:57:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 14:57:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:57:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-03-20 14:57:52,698 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41 [2022-03-20 14:57:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:52,698 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-03-20 14:57:52,698 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 14:57:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-03-20 14:57:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 14:57:52,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:52,699 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:52,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:57:52,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:52,919 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-03-20 14:57:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690467634] [2022-03-20 14:57:52,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times [2022-03-20 14:57:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936341883] [2022-03-20 14:57:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:52,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535061662] [2022-03-20 14:57:52,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:52,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:52,931 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 14:57:52,932 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 14:57:52,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:52,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:52,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 14:57:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 14:57:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:57:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:53,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936341883] [2022-03-20 14:57:53,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:53,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535061662] [2022-03-20 14:57:53,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535061662] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:57:53,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:57:53,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 14:57:53,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690467634] [2022-03-20 14:57:53,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690467634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:53,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:53,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:57:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101632351] [2022-03-20 14:57:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:53,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:57:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:57:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:57:53,278 INFO L87 Difference]: Start difference. First operand 58 states and 76 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 14:57:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:53,323 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-03-20 14:57:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:57:53,323 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-03-20 14:57:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:53,324 INFO L225 Difference]: With dead ends: 65 [2022-03-20 14:57:53,324 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 14:57:53,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:57:53,325 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:53,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 14:57:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 14:57:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:57:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-03-20 14:57:53,336 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46 [2022-03-20 14:57:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:53,336 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-03-20 14:57:53,336 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 14:57:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-03-20 14:57:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 14:57:53,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:53,337 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:53,362 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 14:57:53,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:53,560 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-03-20 14:57:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164070027] [2022-03-20 14:57:53,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times [2022-03-20 14:57:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:53,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092437488] [2022-03-20 14:57:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:53,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:53,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:53,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865396187] [2022-03-20 14:57:53,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:53,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:53,573 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 14:57:53,574 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 14:57:53,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 14:57:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 14:57:53,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092437488] [2022-03-20 14:57:53,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865396187] [2022-03-20 14:57:53,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865396187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:57:53,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:57:53,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 14:57:53,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:53,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164070027] [2022-03-20 14:57:53,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164070027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:53,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:53,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:57:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767607530] [2022-03-20 14:57:53,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:53,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:57:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:53,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:57:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:57:53,905 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:57:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:53,998 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-03-20 14:57:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:57:53,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-20 14:57:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:54,000 INFO L225 Difference]: With dead ends: 69 [2022-03-20 14:57:54,000 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 14:57:54,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:57:54,001 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:54,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 176 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:57:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 14:57:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-20 14:57:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:57:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-03-20 14:57:54,013 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51 [2022-03-20 14:57:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:54,013 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-03-20 14:57:54,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 14:57:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-03-20 14:57:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:57:54,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:54,015 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 14:57:54,038 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 14:57:54,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:54,232 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2022-03-20 14:57:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181961351] [2022-03-20 14:57:54,233 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times [2022-03-20 14:57:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:54,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472537632] [2022-03-20 14:57:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:54,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46863653] [2022-03-20 14:57:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:54,245 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 14:57:54,251 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 14:57:54,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:57:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:54,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:54,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472537632] [2022-03-20 14:57:54,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46863653] [2022-03-20 14:57:54,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46863653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:54,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:54,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 14:57:54,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181961351] [2022-03-20 14:57:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181961351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:54,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:54,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:57:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873579646] [2022-03-20 14:57:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:54,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:57:54,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:54,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:57:54,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:57:54,570 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 14:57:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:54,634 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-03-20 14:57:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:57:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2022-03-20 14:57:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:54,636 INFO L225 Difference]: With dead ends: 96 [2022-03-20 14:57:54,636 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 14:57:54,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:57:54,637 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:54,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 230 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 14:57:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-03-20 14:57:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:57:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-03-20 14:57:54,652 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2022-03-20 14:57:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:54,653 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-03-20 14:57:54,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 14:57:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-03-20 14:57:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 14:57:54,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:54,654 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:54,681 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 14:57:54,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 14:57:54,876 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-03-20 14:57:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720489058] [2022-03-20 14:57:54,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times [2022-03-20 14:57:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:54,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819694459] [2022-03-20 14:57:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:54,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:54,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306457501] [2022-03-20 14:57:54,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:54,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:54,888 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 14:57:54,894 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 14:57:54,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:57:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:55,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819694459] [2022-03-20 14:57:55,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306457501] [2022-03-20 14:57:55,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306457501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:55,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 14:57:55,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:55,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720489058] [2022-03-20 14:57:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720489058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:55,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:57:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836920802] [2022-03-20 14:57:55,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:55,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:57:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:57:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:57:55,207 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:55,258 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-03-20 14:57:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:57:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-03-20 14:57:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:55,260 INFO L225 Difference]: With dead ends: 111 [2022-03-20 14:57:55,260 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 14:57:55,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:57:55,261 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:55,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 14:57:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 14:57:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:57:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-03-20 14:57:55,277 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60 [2022-03-20 14:57:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:55,277 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-03-20 14:57:55,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-03-20 14:57:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 14:57:55,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:55,279 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:55,302 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 14:57:55,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 14:57:55,491 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-03-20 14:57:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467671551] [2022-03-20 14:57:55,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times [2022-03-20 14:57:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096699715] [2022-03-20 14:57:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:55,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:55,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26893009] [2022-03-20 14:57:55,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:55,503 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 14:57:55,512 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 14:57:55,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:55,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:57:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:57:55,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:57:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096699715] [2022-03-20 14:57:55,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26893009] [2022-03-20 14:57:55,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26893009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:55,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:55,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 14:57:55,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:55,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467671551] [2022-03-20 14:57:55,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467671551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:55,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:55,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:57:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222163954] [2022-03-20 14:57:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:55,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:57:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:57:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:57:55,791 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:57:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:55,954 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-03-20 14:57:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:57:55,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-20 14:57:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:55,956 INFO L225 Difference]: With dead ends: 182 [2022-03-20 14:57:55,956 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 14:57:55,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:57:55,957 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:55,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 390 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:57:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 14:57:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-03-20 14:57:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 14:57:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2022-03-20 14:57:55,979 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61 [2022-03-20 14:57:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:55,979 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2022-03-20 14:57:55,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:57:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2022-03-20 14:57:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 14:57:55,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:55,980 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:56,009 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 14:57:56,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 14:57:56,203 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2022-03-20 14:57:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:56,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488761135] [2022-03-20 14:57:56,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times [2022-03-20 14:57:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725358061] [2022-03-20 14:57:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:56,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:56,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724533903] [2022-03-20 14:57:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:56,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:56,215 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 14:57:56,216 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 14:57:56,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:57:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:56,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725358061] [2022-03-20 14:57:56,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724533903] [2022-03-20 14:57:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724533903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:56,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:56,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 14:57:56,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:56,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488761135] [2022-03-20 14:57:56,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488761135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:56,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:56,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:57:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936716220] [2022-03-20 14:57:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:56,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:57:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:57:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:57:56,477 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:56,527 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-03-20 14:57:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:57:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-20 14:57:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:56,531 INFO L225 Difference]: With dead ends: 183 [2022-03-20 14:57:56,531 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 14:57:56,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:57:56,533 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:56,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 14:57:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 14:57:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 14:57:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-03-20 14:57:56,558 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62 [2022-03-20 14:57:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:56,559 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-03-20 14:57:56,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-03-20 14:57:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 14:57:56,559 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:56,560 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:56,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 14:57:56,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 14:57:56,775 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2022-03-20 14:57:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95669534] [2022-03-20 14:57:56,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times [2022-03-20 14:57:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735658981] [2022-03-20 14:57:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:56,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406228015] [2022-03-20 14:57:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:56,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:56,796 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 14:57:56,815 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 14:57:56,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:57:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:56,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 14:57:57,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735658981] [2022-03-20 14:57:57,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406228015] [2022-03-20 14:57:57,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406228015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:57,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:57,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 14:57:57,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95669534] [2022-03-20 14:57:57,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95669534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:57,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:57,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:57:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231306038] [2022-03-20 14:57:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:57,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:57:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:57:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:57:57,118 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:57,199 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions. [2022-03-20 14:57:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:57:57,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-20 14:57:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:57,201 INFO L225 Difference]: With dead ends: 253 [2022-03-20 14:57:57,201 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 14:57:57,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:57:57,203 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:57,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:57:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 14:57:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-03-20 14:57:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 14:57:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-03-20 14:57:57,232 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66 [2022-03-20 14:57:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:57,232 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-03-20 14:57:57,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:57:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-03-20 14:57:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 14:57:57,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:57,233 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:57,258 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 14:57:57,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 14:57:57,455 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-03-20 14:57:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:57,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251439430] [2022-03-20 14:57:57,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times [2022-03-20 14:57:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:57,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761425688] [2022-03-20 14:57:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:57,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:57,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937270899] [2022-03-20 14:57:57,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:57:57,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:57,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:57,469 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 14:57:57,470 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 14:57:57,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:57:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:57:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 14:57:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 14:57:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761425688] [2022-03-20 14:57:57,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937270899] [2022-03-20 14:57:57,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937270899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:57:57,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:57:57,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 14:57:57,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251439430] [2022-03-20 14:57:57,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251439430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:57,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:57,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:57:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434716286] [2022-03-20 14:57:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:57,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:57:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:57:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:57:57,892 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 14:57:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:58,069 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-03-20 14:57:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:57:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-03-20 14:57:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:58,072 INFO L225 Difference]: With dead ends: 195 [2022-03-20 14:57:58,072 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 14:57:58,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:57:58,073 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:58,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 277 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:57:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 14:57:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-03-20 14:57:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 14:57:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2022-03-20 14:57:58,110 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68 [2022-03-20 14:57:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:58,110 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2022-03-20 14:57:58,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 14:57:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2022-03-20 14:57:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 14:57:58,111 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:58,111 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:58,135 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 14:57:58,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 14:57:58,328 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times [2022-03-20 14:57:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [353285531] [2022-03-20 14:57:58,329 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times [2022-03-20 14:57:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745610660] [2022-03-20 14:57:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:58,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:58,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217651606] [2022-03-20 14:57:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:57:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:58,351 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 14:57:58,352 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 14:57:58,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:57:58,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 14:57:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:57:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 14:57:58,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:57:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:57:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745610660] [2022-03-20 14:57:59,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:57:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217651606] [2022-03-20 14:57:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217651606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:57:59,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:57:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 14:57:59,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:57:59,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [353285531] [2022-03-20 14:57:59,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [353285531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:57:59,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:57:59,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:57:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110883567] [2022-03-20 14:57:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:57:59,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:57:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:57:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:57:59,015 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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 14:57:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:57:59,224 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2022-03-20 14:57:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:57:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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 73 [2022-03-20 14:57:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:57:59,226 INFO L225 Difference]: With dead ends: 199 [2022-03-20 14:57:59,226 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 14:57:59,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:57:59,227 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:57:59,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 320 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:57:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 14:57:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-20 14:57:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 14:57:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-03-20 14:57:59,249 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73 [2022-03-20 14:57:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:57:59,249 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-03-20 14:57:59,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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 14:57:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-03-20 14:57:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 14:57:59,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:57:59,250 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:57:59,279 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 14:57:59,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:59,475 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:57:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:57:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times [2022-03-20 14:57:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:57:59,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755267484] [2022-03-20 14:57:59,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:57:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times [2022-03-20 14:57:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:57:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704780948] [2022-03-20 14:57:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:57:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:57:59,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:57:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600428654] [2022-03-20 14:57:59,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:57:59,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:57:59,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:57:59,490 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 14:57:59,492 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 14:57:59,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:57:59,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:57:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 14:57:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 14:58:00,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:00,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704780948] [2022-03-20 14:58:00,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600428654] [2022-03-20 14:58:00,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600428654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:58:00,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:58:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 14:58:00,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755267484] [2022-03-20 14:58:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755267484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:00,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:58:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580127171] [2022-03-20 14:58:00,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:00,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:58:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:58:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:58:00,927 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:58:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:01,926 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2022-03-20 14:58:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:58:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2022-03-20 14:58:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:01,928 INFO L225 Difference]: With dead ends: 203 [2022-03-20 14:58:01,928 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 14:58:01,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:58:01,929 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:01,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 250 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 14:58:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 14:58:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-03-20 14:58:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 14:58:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-03-20 14:58:01,951 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78 [2022-03-20 14:58:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:01,952 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-03-20 14:58:01,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:58:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-03-20 14:58:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 14:58:01,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:01,953 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:01,979 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 14:58:02,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 14:58:02,178 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times [2022-03-20 14:58:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907099544] [2022-03-20 14:58:02,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times [2022-03-20 14:58:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365464990] [2022-03-20 14:58:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:02,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773377225] [2022-03-20 14:58:02,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:02,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:02,193 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 14:58:02,195 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 14:58:02,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:02,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:58:02,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 14:58:02,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 14:58:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365464990] [2022-03-20 14:58:02,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773377225] [2022-03-20 14:58:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773377225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:02,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-20 14:58:02,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907099544] [2022-03-20 14:58:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907099544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:02,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:58:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293398866] [2022-03-20 14:58:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:02,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:58:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:58:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:58:02,779 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:58:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:03,203 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2022-03-20 14:58:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:58:03,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-20 14:58:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:03,205 INFO L225 Difference]: With dead ends: 212 [2022-03-20 14:58:03,205 INFO L226 Difference]: Without dead ends: 210 [2022-03-20 14:58:03,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:58:03,206 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:03,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 333 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-20 14:58:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-03-20 14:58:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 14:58:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-03-20 14:58:03,231 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82 [2022-03-20 14:58:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:03,231 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-03-20 14:58:03,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:58:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-03-20 14:58:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 14:58:03,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:03,233 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:03,258 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 14:58:03,439 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,SelfDestructingSolverStorable16 [2022-03-20 14:58:03,439 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2022-03-20 14:58:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995242146] [2022-03-20 14:58:03,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:03,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times [2022-03-20 14:58:03,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:03,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738355034] [2022-03-20 14:58:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:03,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:03,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:03,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267895997] [2022-03-20 14:58:03,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:03,453 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 14:58:03,475 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 14:58:03,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:58:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 14:58:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:58:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738355034] [2022-03-20 14:58:03,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267895997] [2022-03-20 14:58:03,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267895997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:03,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:03,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 14:58:03,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:03,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995242146] [2022-03-20 14:58:03,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995242146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:03,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:03,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:58:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060446824] [2022-03-20 14:58:03,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:03,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:58:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:58:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:58:03,798 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:03,886 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2022-03-20 14:58:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:58:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-03-20 14:58:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:03,887 INFO L225 Difference]: With dead ends: 214 [2022-03-20 14:58:03,887 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 14:58:03,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:03,888 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:03,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:58:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 14:58:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-03-20 14:58:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 14:58:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-03-20 14:58:03,913 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83 [2022-03-20 14:58:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:03,914 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-03-20 14:58:03,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-03-20 14:58:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 14:58:03,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:03,915 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:03,943 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 14:58:04,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 14:58:04,138 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-03-20 14:58:04,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:04,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460201797] [2022-03-20 14:58:04,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times [2022-03-20 14:58:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710116116] [2022-03-20 14:58:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:04,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:04,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133837949] [2022-03-20 14:58:04,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:04,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:04,153 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 14:58:04,155 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 14:58:04,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:04,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:58:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:58:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:58:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710116116] [2022-03-20 14:58:05,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133837949] [2022-03-20 14:58:05,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133837949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:05,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:05,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 14:58:05,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:05,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460201797] [2022-03-20 14:58:05,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460201797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:05,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:05,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:58:05,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047479792] [2022-03-20 14:58:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:05,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:58:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:58:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:05,039 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:05,294 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-03-20 14:58:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:58:05,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-20 14:58:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:05,296 INFO L225 Difference]: With dead ends: 234 [2022-03-20 14:58:05,296 INFO L226 Difference]: Without dead ends: 232 [2022-03-20 14:58:05,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:58:05,297 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:05,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 401 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:58:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-20 14:58:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-03-20 14:58:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 14:58:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2022-03-20 14:58:05,326 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84 [2022-03-20 14:58:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:05,326 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2022-03-20 14:58:05,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2022-03-20 14:58:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 14:58:05,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:05,327 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:05,353 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 14:58:05,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:05,551 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:05,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times [2022-03-20 14:58:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976615702] [2022-03-20 14:58:05,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times [2022-03-20 14:58:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825316618] [2022-03-20 14:58:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:05,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:05,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:05,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502110670] [2022-03-20 14:58:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:05,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:05,562 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 14:58:05,564 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 14:58:05,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:58:05,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:58:05,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:58:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825316618] [2022-03-20 14:58:05,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502110670] [2022-03-20 14:58:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502110670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:05,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:05,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:58:05,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976615702] [2022-03-20 14:58:05,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976615702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:05,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:05,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:58:05,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233910084] [2022-03-20 14:58:05,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:05,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:58:05,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:58:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:58:05,734 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 14:58:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:05,822 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions. [2022-03-20 14:58:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:58:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-03-20 14:58:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:05,824 INFO L225 Difference]: With dead ends: 371 [2022-03-20 14:58:05,825 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 14:58:05,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:58:05,826 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:05,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 14:58:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-03-20 14:58:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 14:58:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-03-20 14:58:05,856 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87 [2022-03-20 14:58:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:05,856 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-03-20 14:58:05,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 14:58:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-03-20 14:58:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 14:58:05,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:05,857 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:05,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 14:58:06,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:06,071 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times [2022-03-20 14:58:06,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:06,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237064145] [2022-03-20 14:58:06,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times [2022-03-20 14:58:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:06,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697456505] [2022-03-20 14:58:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:06,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:06,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590036317] [2022-03-20 14:58:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:06,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:06,086 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 14:58:06,092 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 14:58:06,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:06,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 14:58:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-20 14:58:06,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-20 14:58:06,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:06,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697456505] [2022-03-20 14:58:06,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:06,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590036317] [2022-03-20 14:58:06,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590036317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:06,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:06,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 14:58:06,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237064145] [2022-03-20 14:58:06,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237064145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:06,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:06,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:58:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279135091] [2022-03-20 14:58:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:06,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:58:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:58:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:58:06,511 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 14:58:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:06,684 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions. [2022-03-20 14:58:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:58:06,685 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2022-03-20 14:58:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:06,686 INFO L225 Difference]: With dead ends: 301 [2022-03-20 14:58:06,686 INFO L226 Difference]: Without dead ends: 297 [2022-03-20 14:58:06,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:06,687 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:06,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 268 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-20 14:58:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2022-03-20 14:58:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 14:58:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2022-03-20 14:58:06,722 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89 [2022-03-20 14:58:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:06,723 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2022-03-20 14:58:06,723 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 14:58:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2022-03-20 14:58:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 14:58:06,723 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:06,724 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:06,750 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 14:58:06,939 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,SelfDestructingSolverStorable20 [2022-03-20 14:58:06,939 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2022-03-20 14:58:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1377150522] [2022-03-20 14:58:06,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times [2022-03-20 14:58:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:06,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105501451] [2022-03-20 14:58:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:06,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:06,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765638208] [2022-03-20 14:58:06,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:06,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:06,951 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 14:58:06,952 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 14:58:06,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:58:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 14:58:07,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:58:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105501451] [2022-03-20 14:58:07,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765638208] [2022-03-20 14:58:07,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765638208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:07,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:07,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 14:58:07,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:07,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1377150522] [2022-03-20 14:58:07,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1377150522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:07,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:07,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:58:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400851737] [2022-03-20 14:58:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:07,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:58:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:58:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:07,318 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:07,450 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-03-20 14:58:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:58:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2022-03-20 14:58:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:07,453 INFO L225 Difference]: With dead ends: 463 [2022-03-20 14:58:07,453 INFO L226 Difference]: Without dead ends: 329 [2022-03-20 14:58:07,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:58:07,454 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:07,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-20 14:58:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-03-20 14:58:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 14:58:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions. [2022-03-20 14:58:07,491 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89 [2022-03-20 14:58:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:07,491 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions. [2022-03-20 14:58:07,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 14:58:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions. [2022-03-20 14:58:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 14:58:07,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:07,492 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 14:58:07,518 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 14:58:07,710 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,SelfDestructingSolverStorable21 [2022-03-20 14:58:07,710 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-03-20 14:58:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651100533] [2022-03-20 14:58:07,711 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times [2022-03-20 14:58:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190353633] [2022-03-20 14:58:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:07,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:07,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288144974] [2022-03-20 14:58:07,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:07,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:07,723 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 14:58:07,724 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 14:58:07,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:07,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 14:58:07,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-20 14:58:11,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:11,662 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:58:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:13,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190353633] [2022-03-20 14:58:13,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:13,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288144974] [2022-03-20 14:58:13,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288144974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:58:13,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:58:13,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 14:58:13,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:13,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651100533] [2022-03-20 14:58:13,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651100533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:13,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:13,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:58:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675406591] [2022-03-20 14:58:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:13,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:58:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:58:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:58:13,360 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:14,505 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-03-20 14:58:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:58:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2022-03-20 14:58:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:14,509 INFO L225 Difference]: With dead ends: 339 [2022-03-20 14:58:14,509 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 14:58:14,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:58:14,510 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:14,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 346 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 14:58:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 14:58:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-03-20 14:58:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 14:58:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2022-03-20 14:58:14,549 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101 [2022-03-20 14:58:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:14,550 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2022-03-20 14:58:14,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2022-03-20 14:58:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 14:58:14,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:14,551 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:14,575 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 14:58:14,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:14,775 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times [2022-03-20 14:58:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:14,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111107313] [2022-03-20 14:58:14,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times [2022-03-20 14:58:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914009730] [2022-03-20 14:58:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:14,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:14,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:14,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869193983] [2022-03-20 14:58:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:14,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:14,785 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 14:58:14,794 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 14:58:14,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 14:58:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 14:58:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 14:58:15,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 14:58:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914009730] [2022-03-20 14:58:15,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869193983] [2022-03-20 14:58:15,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869193983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:15,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:15,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 14:58:15,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111107313] [2022-03-20 14:58:15,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111107313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:15,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:15,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:58:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762228132] [2022-03-20 14:58:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:15,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:58:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:58:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:58:15,213 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 14:58:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:15,315 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions. [2022-03-20 14:58:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:58:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-03-20 14:58:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:15,318 INFO L225 Difference]: With dead ends: 341 [2022-03-20 14:58:15,318 INFO L226 Difference]: Without dead ends: 339 [2022-03-20 14:58:15,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:58:15,319 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:15,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 176 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-20 14:58:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-03-20 14:58:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 14:58:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-03-20 14:58:15,385 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105 [2022-03-20 14:58:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:15,385 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-03-20 14:58:15,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 14:58:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-03-20 14:58:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 14:58:15,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:15,387 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:15,415 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 14:58:15,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:15,603 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times [2022-03-20 14:58:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358449686] [2022-03-20 14:58:15,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times [2022-03-20 14:58:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941689897] [2022-03-20 14:58:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:15,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:15,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588158819] [2022-03-20 14:58:15,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:15,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:15,620 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 14:58:15,621 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 14:58:15,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:58:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 14:58:15,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:16,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941689897] [2022-03-20 14:58:16,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588158819] [2022-03-20 14:58:16,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588158819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:16,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:16,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 14:58:16,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:16,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358449686] [2022-03-20 14:58:16,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358449686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:16,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:16,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:58:16,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496375794] [2022-03-20 14:58:16,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:16,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:58:16,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:58:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:16,087 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:16,205 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2022-03-20 14:58:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:58:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2022-03-20 14:58:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:16,207 INFO L225 Difference]: With dead ends: 349 [2022-03-20 14:58:16,207 INFO L226 Difference]: Without dead ends: 342 [2022-03-20 14:58:16,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:58:16,208 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:16,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-20 14:58:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-20 14:58:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 14:58:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions. [2022-03-20 14:58:16,252 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106 [2022-03-20 14:58:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:16,252 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions. [2022-03-20 14:58:16,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions. [2022-03-20 14:58:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 14:58:16,253 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:16,253 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:16,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 14:58:16,473 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,SelfDestructingSolverStorable24 [2022-03-20 14:58:16,473 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times [2022-03-20 14:58:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955290297] [2022-03-20 14:58:16,474 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times [2022-03-20 14:58:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338811857] [2022-03-20 14:58:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:16,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:16,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349786559] [2022-03-20 14:58:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:16,496 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 14:58:16,497 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 14:58:16,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 14:58:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 14:58:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:19,115 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:58:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 14:58:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338811857] [2022-03-20 14:58:24,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349786559] [2022-03-20 14:58:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349786559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:24,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:24,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 14:58:24,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955290297] [2022-03-20 14:58:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955290297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:24,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:24,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:58:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096630939] [2022-03-20 14:58:24,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:24,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:58:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:58:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=414, Unknown=2, NotChecked=0, Total=506 [2022-03-20 14:58:24,315 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:58:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:25,407 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions. [2022-03-20 14:58:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:58:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2022-03-20 14:58:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:25,416 INFO L225 Difference]: With dead ends: 369 [2022-03-20 14:58:25,417 INFO L226 Difference]: Without dead ends: 366 [2022-03-20 14:58:25,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=140, Invalid=614, Unknown=2, NotChecked=0, Total=756 [2022-03-20 14:58:25,417 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:25,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 512 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:58:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-20 14:58:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-03-20 14:58:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 14:58:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-03-20 14:58:25,465 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107 [2022-03-20 14:58:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:25,465 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-03-20 14:58:25,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:58:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-03-20 14:58:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 14:58:25,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:25,466 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 14:58:25,492 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 14:58:25,679 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,SelfDestructingSolverStorable25 [2022-03-20 14:58:25,679 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times [2022-03-20 14:58:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:25,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164043757] [2022-03-20 14:58:25,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times [2022-03-20 14:58:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572124924] [2022-03-20 14:58:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:25,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036122602] [2022-03-20 14:58:25,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:25,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:25,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:25,689 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 14:58:25,690 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 14:58:25,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:58:25,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:58:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 14:58:25,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:26,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572124924] [2022-03-20 14:58:26,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036122602] [2022-03-20 14:58:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036122602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:26,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:26,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 14:58:26,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164043757] [2022-03-20 14:58:26,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164043757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:26,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:26,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:58:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117508918] [2022-03-20 14:58:26,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:26,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:58:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:58:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:58:26,223 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:26,354 INFO L93 Difference]: Finished difference Result 434 states and 549 transitions. [2022-03-20 14:58:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:58:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2022-03-20 14:58:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:26,357 INFO L225 Difference]: With dead ends: 434 [2022-03-20 14:58:26,357 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 14:58:26,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:58:26,358 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:26,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 211 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 14:58:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2022-03-20 14:58:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 272 states have (on average 1.2022058823529411) internal successors, (327), 279 states have internal predecessors, (327), 106 states have call successors, (106), 45 states have call predecessors, (106), 44 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 14:58:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 536 transitions. [2022-03-20 14:58:26,425 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 536 transitions. Word has length 110 [2022-03-20 14:58:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:26,425 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 536 transitions. [2022-03-20 14:58:26,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 536 transitions. [2022-03-20 14:58:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 14:58:26,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:26,427 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:26,437 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 14:58:26,633 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,SelfDestructingSolverStorable26 [2022-03-20 14:58:26,633 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 5 times [2022-03-20 14:58:26,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:26,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2078660909] [2022-03-20 14:58:26,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 6 times [2022-03-20 14:58:26,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:26,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531122020] [2022-03-20 14:58:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:26,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:26,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510917906] [2022-03-20 14:58:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:26,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:26,642 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 14:58:26,643 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 14:58:26,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:58:26,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:58:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531122020] [2022-03-20 14:58:27,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510917906] [2022-03-20 14:58:27,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510917906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:27,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 14:58:27,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2078660909] [2022-03-20 14:58:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2078660909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:27,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:58:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728004050] [2022-03-20 14:58:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:27,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:58:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:58:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:58:27,016 INFO L87 Difference]: Start difference. First operand 423 states and 536 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 14:58:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:27,337 INFO L93 Difference]: Finished difference Result 589 states and 810 transitions. [2022-03-20 14:58:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:58:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2022-03-20 14:58:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:27,339 INFO L225 Difference]: With dead ends: 589 [2022-03-20 14:58:27,339 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 14:58:27,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:58:27,340 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 32 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:27,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:58:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 14:58:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 470. [2022-03-20 14:58:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 301 states have (on average 1.2259136212624584) internal successors, (369), 306 states have internal predecessors, (369), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 14:58:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 614 transitions. [2022-03-20 14:58:27,401 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 614 transitions. Word has length 111 [2022-03-20 14:58:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:27,401 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 614 transitions. [2022-03-20 14:58:27,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 14:58:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 614 transitions. [2022-03-20 14:58:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 14:58:27,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:27,402 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 14:58:27,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 14:58:27,611 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,SelfDestructingSolverStorable27 [2022-03-20 14:58:27,612 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 3 times [2022-03-20 14:58:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813433983] [2022-03-20 14:58:27,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 4 times [2022-03-20 14:58:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:27,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894998983] [2022-03-20 14:58:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:27,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:27,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:27,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065693358] [2022-03-20 14:58:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:27,620 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 14:58:27,621 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 14:58:27,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:27,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:58:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 14:58:27,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:28,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:28,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894998983] [2022-03-20 14:58:28,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:28,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065693358] [2022-03-20 14:58:28,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065693358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:28,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:28,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 14:58:28,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813433983] [2022-03-20 14:58:28,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813433983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:28,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:28,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:58:28,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469998350] [2022-03-20 14:58:28,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:28,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:58:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:58:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:58:28,066 INFO L87 Difference]: Start difference. First operand 470 states and 614 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:28,243 INFO L93 Difference]: Finished difference Result 644 states and 881 transitions. [2022-03-20 14:58:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:58:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2022-03-20 14:58:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:28,246 INFO L225 Difference]: With dead ends: 644 [2022-03-20 14:58:28,246 INFO L226 Difference]: Without dead ends: 474 [2022-03-20 14:58:28,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:58:28,247 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:28,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 172 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-20 14:58:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-03-20 14:58:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 305 states have (on average 1.2163934426229508) internal successors, (371), 310 states have internal predecessors, (371), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 14:58:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 616 transitions. [2022-03-20 14:58:28,309 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 616 transitions. Word has length 112 [2022-03-20 14:58:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:28,309 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 616 transitions. [2022-03-20 14:58:28,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 616 transitions. [2022-03-20 14:58:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 14:58:28,310 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:28,310 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:28,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:28,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 14:58:28,523 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 5 times [2022-03-20 14:58:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749094680] [2022-03-20 14:58:28,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 6 times [2022-03-20 14:58:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689721837] [2022-03-20 14:58:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:28,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:28,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444047236] [2022-03-20 14:58:28,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:28,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:28,542 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 14:58:28,544 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 14:58:28,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 14:58:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:58:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 14:58:28,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 14:58:29,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689721837] [2022-03-20 14:58:29,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444047236] [2022-03-20 14:58:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444047236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:29,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:29,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 14:58:29,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749094680] [2022-03-20 14:58:29,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749094680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:29,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:29,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:58:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936661451] [2022-03-20 14:58:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:29,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:58:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:58:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:58:29,066 INFO L87 Difference]: Start difference. First operand 474 states and 616 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:29,253 INFO L93 Difference]: Finished difference Result 731 states and 966 transitions. [2022-03-20 14:58:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:58:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-03-20 14:58:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:29,256 INFO L225 Difference]: With dead ends: 731 [2022-03-20 14:58:29,256 INFO L226 Difference]: Without dead ends: 561 [2022-03-20 14:58:29,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:58:29,257 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:29,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 231 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-20 14:58:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 553. [2022-03-20 14:58:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 361 states have (on average 1.1911357340720221) internal successors, (430), 367 states have internal predecessors, (430), 133 states have call successors, (133), 59 states have call predecessors, (133), 58 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2022-03-20 14:58:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 692 transitions. [2022-03-20 14:58:29,320 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 692 transitions. Word has length 116 [2022-03-20 14:58:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:29,320 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 692 transitions. [2022-03-20 14:58:29,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 14:58:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 692 transitions. [2022-03-20 14:58:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 14:58:29,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:29,322 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:29,344 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 14:58:29,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:29,543 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 3 times [2022-03-20 14:58:29,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:29,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907175258] [2022-03-20 14:58:29,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 4 times [2022-03-20 14:58:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134246017] [2022-03-20 14:58:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:29,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:29,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:29,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673551351] [2022-03-20 14:58:29,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:29,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:29,552 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 14:58:29,553 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 14:58:29,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:58:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 43 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 14:58:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 14:58:30,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134246017] [2022-03-20 14:58:30,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673551351] [2022-03-20 14:58:30,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673551351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:30,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:30,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 14:58:30,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907175258] [2022-03-20 14:58:30,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907175258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:30,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:30,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:58:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621369614] [2022-03-20 14:58:30,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:30,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:58:30,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:58:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:58:30,122 INFO L87 Difference]: Start difference. First operand 553 states and 692 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:30,361 INFO L93 Difference]: Finished difference Result 606 states and 774 transitions. [2022-03-20 14:58:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:58:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 118 [2022-03-20 14:58:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:30,365 INFO L225 Difference]: With dead ends: 606 [2022-03-20 14:58:30,365 INFO L226 Difference]: Without dead ends: 603 [2022-03-20 14:58:30,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:58:30,366 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:30,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 381 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:58:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-20 14:58:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2022-03-20 14:58:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 386 states have (on average 1.2098445595854923) internal successors, (467), 393 states have internal predecessors, (467), 150 states have call successors, (150), 60 states have call predecessors, (150), 59 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2022-03-20 14:58:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 763 transitions. [2022-03-20 14:58:30,445 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 763 transitions. Word has length 118 [2022-03-20 14:58:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:30,445 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 763 transitions. [2022-03-20 14:58:30,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 763 transitions. [2022-03-20 14:58:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 14:58:30,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:30,447 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:30,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 14:58:30,659 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,SelfDestructingSolverStorable30 [2022-03-20 14:58:30,659 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 5 times [2022-03-20 14:58:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368596375] [2022-03-20 14:58:30,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 6 times [2022-03-20 14:58:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101622385] [2022-03-20 14:58:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:30,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:30,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211050911] [2022-03-20 14:58:30,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:30,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:30,668 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 14:58:30,675 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 14:58:31,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:58:31,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:31,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 14:58:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-20 14:58:50,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:52,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101622385] [2022-03-20 14:58:52,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:52,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211050911] [2022-03-20 14:58:52,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211050911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:58:52,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:58:52,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 14:58:52,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368596375] [2022-03-20 14:58:52,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368596375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:52,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:52,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:58:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215282899] [2022-03-20 14:58:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:52,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:58:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:58:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:58:52,610 INFO L87 Difference]: Start difference. First operand 596 states and 763 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:55,609 INFO L93 Difference]: Finished difference Result 619 states and 791 transitions. [2022-03-20 14:58:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:58:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2022-03-20 14:58:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:55,611 INFO L225 Difference]: With dead ends: 619 [2022-03-20 14:58:55,611 INFO L226 Difference]: Without dead ends: 615 [2022-03-20 14:58:55,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-03-20 14:58:55,612 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:55,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 433 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 14:58:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-03-20 14:58:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 609. [2022-03-20 14:58:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 394 states have (on average 1.2081218274111676) internal successors, (476), 400 states have internal predecessors, (476), 154 states have call successors, (154), 62 states have call predecessors, (154), 60 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 14:58:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 780 transitions. [2022-03-20 14:58:55,699 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 780 transitions. Word has length 124 [2022-03-20 14:58:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:55,699 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 780 transitions. [2022-03-20 14:58:55,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:58:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 780 transitions. [2022-03-20 14:58:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 14:58:55,700 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:55,700 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:55,707 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 14:58:55,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:55,907 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 7 times [2022-03-20 14:58:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [365974494] [2022-03-20 14:58:55,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 8 times [2022-03-20 14:58:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205408077] [2022-03-20 14:58:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:55,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:55,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739927043] [2022-03-20 14:58:55,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:55,917 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 14:58:55,918 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 14:58:55,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 14:58:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:56,566 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:58:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 14:58:56,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 125 proven. 32 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 14:58:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205408077] [2022-03-20 14:58:57,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739927043] [2022-03-20 14:58:57,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739927043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:57,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:57,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-20 14:58:57,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [365974494] [2022-03-20 14:58:57,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [365974494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:57,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:57,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:58:57,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390897237] [2022-03-20 14:58:57,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:57,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:58:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:58:57,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:58:57,208 INFO L87 Difference]: Start difference. First operand 609 states and 780 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 14:58:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:57,641 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2022-03-20 14:58:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:58:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2022-03-20 14:58:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:57,644 INFO L225 Difference]: With dead ends: 638 [2022-03-20 14:58:57,644 INFO L226 Difference]: Without dead ends: 636 [2022-03-20 14:58:57,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:58:57,645 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 38 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:57,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 584 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-20 14:58:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 632. [2022-03-20 14:58:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 410 states have internal predecessors, (490), 166 states have call successors, (166), 63 states have call predecessors, (166), 61 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-20 14:58:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2022-03-20 14:58:57,763 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2022-03-20 14:58:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:57,763 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2022-03-20 14:58:57,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 14:58:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2022-03-20 14:58:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 14:58:57,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:57,765 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:57,790 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 14:58:57,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:57,979 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 9 times [2022-03-20 14:58:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:57,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881607633] [2022-03-20 14:58:57,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 10 times [2022-03-20 14:58:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:57,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723398609] [2022-03-20 14:58:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:57,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324385919] [2022-03-20 14:58:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:57,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:57,988 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 14:58:57,989 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 14:58:58,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:58,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 14:58:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 69 proven. 118 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-03-20 14:58:59,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:01,915 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (+ c_main_~k~0 1))) (let ((.cse3 (* (- 1) c_main_~b~0)) (.cse5 (+ (* (- 1) (* c_main_~s~0 .cse6)) c_main_~r~0)) (.cse4 (+ (* (- 1) c_main_~q~0 .cse6) c_main_~p~0))) (let ((.cse0 (* .cse4 c_main_~x~0)) (.cse1 (* .cse5 c_main_~y~0)) (.cse2 (+ .cse3 c_main_~c~0))) (or (= (+ .cse0 .cse1 (* .cse2 c_main_~y~0)) (+ .cse3 c_main_~c~0 (* .cse4 c_main_~xy~0) (* c_main_~yy~0 .cse5))) (not (= (+ .cse0 .cse1) .cse2)))))) is different from true [2022-03-20 14:59:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 72 proven. 95 refuted. 0 times theorem prover too weak. 336 trivial. 20 not checked. [2022-03-20 14:59:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723398609] [2022-03-20 14:59:03,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324385919] [2022-03-20 14:59:03,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324385919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:03,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:03,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2022-03-20 14:59:03,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881607633] [2022-03-20 14:59:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881607633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:03,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:03,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:59:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72366516] [2022-03-20 14:59:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:03,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:59:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:59:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=356, Unknown=1, NotChecked=40, Total=506 [2022-03-20 14:59:03,023 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 14:59:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:03,492 INFO L93 Difference]: Finished difference Result 642 states and 827 transitions. [2022-03-20 14:59:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:59:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-03-20 14:59:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:03,495 INFO L225 Difference]: With dead ends: 642 [2022-03-20 14:59:03,495 INFO L226 Difference]: Without dead ends: 640 [2022-03-20 14:59:03,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=146, Invalid=507, Unknown=1, NotChecked=48, Total=702 [2022-03-20 14:59:03,496 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 37 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:03,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 531 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:59:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-20 14:59:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2022-03-20 14:59:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 413 states have internal predecessors, (493), 166 states have call successors, (166), 64 states have call predecessors, (166), 62 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-20 14:59:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 821 transitions. [2022-03-20 14:59:03,578 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 821 transitions. Word has length 128 [2022-03-20 14:59:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:03,578 INFO L478 AbstractCegarLoop]: Abstraction has 636 states and 821 transitions. [2022-03-20 14:59:03,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 14:59:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 821 transitions. [2022-03-20 14:59:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 14:59:03,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:03,579 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:03,595 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 14:59:03,779 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,SelfDestructingSolverStorable33 [2022-03-20 14:59:03,780 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 7 times [2022-03-20 14:59:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862485338] [2022-03-20 14:59:03,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 8 times [2022-03-20 14:59:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573341652] [2022-03-20 14:59:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:03,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608355727] [2022-03-20 14:59:03,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:03,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:03,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:03,788 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 14:59:03,799 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 14:59:03,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:03,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 14:59:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 137 proven. 57 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 14:59:04,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:05,375 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 12 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-20 14:59:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573341652] [2022-03-20 14:59:05,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608355727] [2022-03-20 14:59:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608355727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:05,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:05,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-20 14:59:05,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862485338] [2022-03-20 14:59:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862485338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:05,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:05,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:59:05,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146853706] [2022-03-20 14:59:05,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:05,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:59:05,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:59:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:59:05,583 INFO L87 Difference]: Start difference. First operand 636 states and 821 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 14:59:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:06,467 INFO L93 Difference]: Finished difference Result 669 states and 868 transitions. [2022-03-20 14:59:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:59:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2022-03-20 14:59:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:06,471 INFO L225 Difference]: With dead ends: 669 [2022-03-20 14:59:06,471 INFO L226 Difference]: Without dead ends: 664 [2022-03-20 14:59:06,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:59:06,472 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:06,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 710 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:59:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-20 14:59:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 644. [2022-03-20 14:59:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 411 states have (on average 1.2092457420924574) internal successors, (497), 417 states have internal predecessors, (497), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 14:59:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 832 transitions. [2022-03-20 14:59:06,567 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 832 transitions. Word has length 130 [2022-03-20 14:59:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:06,567 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 832 transitions. [2022-03-20 14:59:06,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 14:59:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 832 transitions. [2022-03-20 14:59:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 14:59:06,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:06,569 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 14:59:06,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 14:59:06,769 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,SelfDestructingSolverStorable34 [2022-03-20 14:59:06,770 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 7 times [2022-03-20 14:59:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:06,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235055371] [2022-03-20 14:59:06,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 8 times [2022-03-20 14:59:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:06,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139735912] [2022-03-20 14:59:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:06,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162679845] [2022-03-20 14:59:06,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:06,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:06,780 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 14:59:06,781 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 14:59:06,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:06,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:59:06,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 14:59:07,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 14:59:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139735912] [2022-03-20 14:59:07,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162679845] [2022-03-20 14:59:07,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162679845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:07,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:07,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 14:59:07,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:07,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235055371] [2022-03-20 14:59:07,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235055371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:07,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:07,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:59:07,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914834543] [2022-03-20 14:59:07,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:07,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:59:07,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:59:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:59:07,341 INFO L87 Difference]: Start difference. First operand 644 states and 832 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 14:59:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:07,528 INFO L93 Difference]: Finished difference Result 662 states and 853 transitions. [2022-03-20 14:59:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:59:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-20 14:59:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:07,530 INFO L225 Difference]: With dead ends: 662 [2022-03-20 14:59:07,530 INFO L226 Difference]: Without dead ends: 653 [2022-03-20 14:59:07,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=300, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:59:07,531 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:07,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:59:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-20 14:59:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2022-03-20 14:59:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 420 states have (on average 1.2047619047619047) internal successors, (506), 426 states have internal predecessors, (506), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 14:59:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 841 transitions. [2022-03-20 14:59:07,640 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 841 transitions. Word has length 133 [2022-03-20 14:59:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:07,641 INFO L478 AbstractCegarLoop]: Abstraction has 653 states and 841 transitions. [2022-03-20 14:59:07,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 14:59:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 841 transitions. [2022-03-20 14:59:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 14:59:07,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:07,643 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-03-20 14:59:07,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 14:59:07,866 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,SelfDestructingSolverStorable35 [2022-03-20 14:59:07,866 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 9 times [2022-03-20 14:59:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944615194] [2022-03-20 14:59:07,867 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 10 times [2022-03-20 14:59:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354190453] [2022-03-20 14:59:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:07,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:07,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674257256] [2022-03-20 14:59:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:07,876 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 14:59:07,877 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 14:59:07,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:07,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 14:59:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:08,624 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:08,627 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 14:59:08,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:09,319 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 14:59:09,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354190453] [2022-03-20 14:59:09,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674257256] [2022-03-20 14:59:09,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674257256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:09,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:09,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-20 14:59:09,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944615194] [2022-03-20 14:59:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944615194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:09,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:09,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:59:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324696559] [2022-03-20 14:59:09,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:09,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:59:09,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:59:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:59:09,498 INFO L87 Difference]: Start difference. First operand 653 states and 841 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-03-20 14:59:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:10,022 INFO L93 Difference]: Finished difference Result 665 states and 855 transitions. [2022-03-20 14:59:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:59:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 134 [2022-03-20 14:59:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:10,026 INFO L225 Difference]: With dead ends: 665 [2022-03-20 14:59:10,026 INFO L226 Difference]: Without dead ends: 658 [2022-03-20 14:59:10,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:59:10,027 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:10,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 650 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 478 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-03-20 14:59:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-20 14:59:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 654. [2022-03-20 14:59:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 421 states have (on average 1.2042755344418052) internal successors, (507), 427 states have internal predecessors, (507), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 14:59:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 842 transitions. [2022-03-20 14:59:10,118 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 842 transitions. Word has length 134 [2022-03-20 14:59:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:10,118 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 842 transitions. [2022-03-20 14:59:10,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-03-20 14:59:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 842 transitions. [2022-03-20 14:59:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 14:59:10,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:10,119 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:10,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 14:59:10,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:10,322 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 7 times [2022-03-20 14:59:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1771979383] [2022-03-20 14:59:10,323 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 8 times [2022-03-20 14:59:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:10,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551545347] [2022-03-20 14:59:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:10,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059424103] [2022-03-20 14:59:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:10,330 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 14:59:10,332 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 14:59:10,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:10,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:59:10,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 14:59:10,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 14:59:10,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:10,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551545347] [2022-03-20 14:59:10,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:10,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059424103] [2022-03-20 14:59:10,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059424103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:10,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:10,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 14:59:10,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:10,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1771979383] [2022-03-20 14:59:10,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1771979383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:10,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:10,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:59:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061939510] [2022-03-20 14:59:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:10,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:59:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:59:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:59:10,906 INFO L87 Difference]: Start difference. First operand 654 states and 842 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 14:59:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:11,143 INFO L93 Difference]: Finished difference Result 968 states and 1272 transitions. [2022-03-20 14:59:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:59:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2022-03-20 14:59:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:11,146 INFO L225 Difference]: With dead ends: 968 [2022-03-20 14:59:11,146 INFO L226 Difference]: Without dead ends: 771 [2022-03-20 14:59:11,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:59:11,147 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:11,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 239 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:59:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-20 14:59:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 761. [2022-03-20 14:59:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 494 states have (on average 1.180161943319838) internal successors, (583), 500 states have internal predecessors, (583), 186 states have call successors, (186), 82 states have call predecessors, (186), 80 states have return successors, (182), 178 states have call predecessors, (182), 182 states have call successors, (182) [2022-03-20 14:59:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 951 transitions. [2022-03-20 14:59:11,260 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 951 transitions. Word has length 139 [2022-03-20 14:59:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:11,260 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 951 transitions. [2022-03-20 14:59:11,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 14:59:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 951 transitions. [2022-03-20 14:59:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 14:59:11,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:11,262 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:11,287 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 14:59:11,471 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,SelfDestructingSolverStorable37 [2022-03-20 14:59:11,471 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 11 times [2022-03-20 14:59:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765643013] [2022-03-20 14:59:11,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 12 times [2022-03-20 14:59:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170055506] [2022-03-20 14:59:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:11,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:11,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190421959] [2022-03-20 14:59:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:11,486 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 14:59:11,508 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 14:59:12,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:12,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 14:59:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 101 proven. 93 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-03-20 14:59:21,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170055506] [2022-03-20 14:59:31,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190421959] [2022-03-20 14:59:31,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190421959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:59:31,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:59:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 14:59:31,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:31,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765643013] [2022-03-20 14:59:31,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765643013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:31,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:59:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474865901] [2022-03-20 14:59:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:31,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:59:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:59:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=681, Unknown=4, NotChecked=0, Total=812 [2022-03-20 14:59:31,487 INFO L87 Difference]: Start difference. First operand 761 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 14:59:46,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:59:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:46,688 INFO L93 Difference]: Finished difference Result 815 states and 1023 transitions. [2022-03-20 14:59:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:59:46,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 141 [2022-03-20 14:59:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:46,694 INFO L225 Difference]: With dead ends: 815 [2022-03-20 14:59:46,694 INFO L226 Difference]: Without dead ends: 810 [2022-03-20 14:59:46,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=188, Invalid=998, Unknown=4, NotChecked=0, Total=1190 [2022-03-20 14:59:46,695 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 61 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:46,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 734 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 685 Invalid, 0 Unknown, 10 Unchecked, 5.7s Time] [2022-03-20 14:59:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-20 14:59:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 794. [2022-03-20 14:59:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 513 states have (on average 1.1851851851851851) internal successors, (608), 519 states have internal predecessors, (608), 198 states have call successors, (198), 84 states have call predecessors, (198), 82 states have return successors, (194), 190 states have call predecessors, (194), 194 states have call successors, (194) [2022-03-20 14:59:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1000 transitions. [2022-03-20 14:59:46,822 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1000 transitions. Word has length 141 [2022-03-20 14:59:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:46,822 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1000 transitions. [2022-03-20 14:59:46,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 14:59:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1000 transitions. [2022-03-20 14:59:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 14:59:46,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:46,823 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:46,832 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 14:59:47,030 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,SelfDestructingSolverStorable38 [2022-03-20 14:59:47,030 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 13 times [2022-03-20 14:59:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:47,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966074617] [2022-03-20 14:59:47,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:47,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 14 times [2022-03-20 14:59:47,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:47,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980525492] [2022-03-20 14:59:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:47,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:47,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513648658] [2022-03-20 14:59:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:47,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:47,041 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 14:59:47,043 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 14:59:47,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 14:59:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:48,168 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 112 proven. 92 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-03-20 14:59:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-20 14:59:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980525492] [2022-03-20 14:59:49,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513648658] [2022-03-20 14:59:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513648658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:49,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:49,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-20 14:59:49,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966074617] [2022-03-20 14:59:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966074617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:49,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:49,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:59:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572023788] [2022-03-20 14:59:49,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:49,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:59:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:59:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:59:49,989 INFO L87 Difference]: Start difference. First operand 794 states and 1000 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 14:59:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:51,497 INFO L93 Difference]: Finished difference Result 837 states and 1055 transitions. [2022-03-20 14:59:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:59:51,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 146 [2022-03-20 14:59:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:51,501 INFO L225 Difference]: With dead ends: 837 [2022-03-20 14:59:51,501 INFO L226 Difference]: Without dead ends: 835 [2022-03-20 14:59:51,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-20 14:59:51,502 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:51,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 762 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 14:59:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-20 14:59:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 829. [2022-03-20 14:59:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 532 states have (on average 1.1860902255639099) internal successors, (631), 538 states have internal predecessors, (631), 210 states have call successors, (210), 88 states have call predecessors, (210), 86 states have return successors, (206), 202 states have call predecessors, (206), 206 states have call successors, (206) [2022-03-20 14:59:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1047 transitions. [2022-03-20 14:59:51,619 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1047 transitions. Word has length 146 [2022-03-20 14:59:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:51,619 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1047 transitions. [2022-03-20 14:59:51,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 14:59:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1047 transitions. [2022-03-20 14:59:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 14:59:51,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:51,621 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:51,644 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 14:59:51,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 14:59:51,844 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1180190888, now seen corresponding path program 15 times [2022-03-20 14:59:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:51,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169797090] [2022-03-20 14:59:51,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1180190888, now seen corresponding path program 16 times [2022-03-20 14:59:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:51,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908453460] [2022-03-20 14:59:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:51,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:51,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826407576] [2022-03-20 14:59:51,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:51,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:51,854 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 14:59:51,856 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 14:59:51,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:51,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 14:59:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:52,614 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:52,616 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:52,945 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 175 proven. 128 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-03-20 14:59:53,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:53,608 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:59:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 187 proven. 23 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-03-20 14:59:53,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908453460] [2022-03-20 14:59:53,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826407576] [2022-03-20 14:59:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826407576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:53,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:53,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-20 14:59:53,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169797090] [2022-03-20 14:59:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169797090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:53,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:53,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:59:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428499243] [2022-03-20 14:59:53,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:53,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:59:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:59:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:59:53,785 INFO L87 Difference]: Start difference. First operand 829 states and 1047 transitions. Second operand has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-20 14:59:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:54,531 INFO L93 Difference]: Finished difference Result 858 states and 1091 transitions. [2022-03-20 14:59:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:59:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 146 [2022-03-20 14:59:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:54,535 INFO L225 Difference]: With dead ends: 858 [2022-03-20 14:59:54,535 INFO L226 Difference]: Without dead ends: 856 [2022-03-20 14:59:54,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 268 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:59:54,536 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 48 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:54,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 771 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 759 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-03-20 14:59:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-20 14:59:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 852. [2022-03-20 14:59:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 542 states have (on average 1.1900369003690037) internal successors, (645), 548 states have internal predecessors, (645), 222 states have call successors, (222), 89 states have call predecessors, (222), 87 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-03-20 14:59:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1085 transitions. [2022-03-20 14:59:54,677 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1085 transitions. Word has length 146 [2022-03-20 14:59:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:54,677 INFO L478 AbstractCegarLoop]: Abstraction has 852 states and 1085 transitions. [2022-03-20 14:59:54,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-20 14:59:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1085 transitions. [2022-03-20 14:59:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 14:59:54,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:54,679 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:54,702 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 14:59:54,902 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,SelfDestructingSolverStorable40 [2022-03-20 14:59:54,902 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 17 times [2022-03-20 14:59:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:54,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764380443] [2022-03-20 14:59:54,903 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 18 times [2022-03-20 14:59:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:54,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817700079] [2022-03-20 14:59:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:54,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:54,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811161150] [2022-03-20 14:59:54,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:54,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:54,913 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:54,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 14:59:55,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:59:55,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 14:59:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 79 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-03-20 14:59:58,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:58,704 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:00:02,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817700079] [2022-03-20 15:00:02,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811161150] [2022-03-20 15:00:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811161150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:00:02,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:00:02,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 15:00:02,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:02,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764380443] [2022-03-20 15:00:02,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764380443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:02,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:02,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:00:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543951311] [2022-03-20 15:00:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:02,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:00:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:00:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:00:02,966 INFO L87 Difference]: Start difference. First operand 852 states and 1085 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-20 15:00:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:05,774 INFO L93 Difference]: Finished difference Result 950 states and 1237 transitions. [2022-03-20 15:00:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:00:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 151 [2022-03-20 15:00:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:05,779 INFO L225 Difference]: With dead ends: 950 [2022-03-20 15:00:05,779 INFO L226 Difference]: Without dead ends: 948 [2022-03-20 15:00:05,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-20 15:00:05,780 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 79 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:05,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 653 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 15:00:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-20 15:00:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 924. [2022-03-20 15:00:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 583 states have (on average 1.2075471698113207) internal successors, (704), 590 states have internal predecessors, (704), 251 states have call successors, (251), 91 states have call predecessors, (251), 89 states have return successors, (247), 242 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-20 15:00:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1202 transitions. [2022-03-20 15:00:05,927 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1202 transitions. Word has length 151 [2022-03-20 15:00:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:05,928 INFO L478 AbstractCegarLoop]: Abstraction has 924 states and 1202 transitions. [2022-03-20 15:00:05,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-20 15:00:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1202 transitions. [2022-03-20 15:00:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 15:00:05,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:05,929 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:05,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:06,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:06,136 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 19 times [2022-03-20 15:00:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:06,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386741577] [2022-03-20 15:00:06,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 20 times [2022-03-20 15:00:06,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:06,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220595395] [2022-03-20 15:00:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:06,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:06,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725532566] [2022-03-20 15:00:06,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:00:06,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:06,146 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:06,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 15:00:06,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:00:06,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:06,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 15:00:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:09,447 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:00:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 170 proven. 97 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 15:00:10,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:10,242 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:00:10,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:10,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220595395] [2022-03-20 15:00:10,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:10,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725532566] [2022-03-20 15:00:10,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725532566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:00:10,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:00:10,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 15:00:10,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386741577] [2022-03-20 15:00:10,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386741577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:10,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:10,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:00:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074217446] [2022-03-20 15:00:10,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:10,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:00:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:00:10,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:00:10,489 INFO L87 Difference]: Start difference. First operand 924 states and 1202 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 15:00:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:12,740 INFO L93 Difference]: Finished difference Result 938 states and 1214 transitions. [2022-03-20 15:00:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:00:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 151 [2022-03-20 15:00:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:12,745 INFO L225 Difference]: With dead ends: 938 [2022-03-20 15:00:12,745 INFO L226 Difference]: Without dead ends: 936 [2022-03-20 15:00:12,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:00:12,745 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 75 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:12,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 652 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 15:00:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-20 15:00:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 932. [2022-03-20 15:00:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 589 states have (on average 1.2054329371816639) internal successors, (710), 596 states have internal predecessors, (710), 251 states have call successors, (251), 93 states have call predecessors, (251), 91 states have return successors, (247), 242 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-20 15:00:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1208 transitions. [2022-03-20 15:00:12,894 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1208 transitions. Word has length 151 [2022-03-20 15:00:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:12,894 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1208 transitions. [2022-03-20 15:00:12,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 15:00:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1208 transitions. [2022-03-20 15:00:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 15:00:12,896 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:12,896 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:12,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 15:00:13,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:13,114 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 11 times [2022-03-20 15:00:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585077898] [2022-03-20 15:00:13,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 12 times [2022-03-20 15:00:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:13,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782593080] [2022-03-20 15:00:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:13,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402798085] [2022-03-20 15:00:13,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:00:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:13,123 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:13,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 15:00:13,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:00:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 15:00:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 89 proven. 111 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-20 15:00:14,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:14,915 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:00:37,778 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:02:45,258 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_321 Int) (v_main_~s~0_BEFORE_CALL_389 Int) (v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int) (v_main_~y~0_BEFORE_CALL_413 Int) (v_main_~q~0_BEFORE_CALL_376 Int) (v_main_~x~0_BEFORE_CALL_430 Int) (v_main_~p~0_BEFORE_CALL_279 Int)) (or (= (+ (* v_main_~y~0_BEFORE_CALL_413 v_main_~r~0_BEFORE_CALL_321) (* v_main_~p~0_BEFORE_CALL_279 v_main_~x~0_BEFORE_CALL_430)) (+ (* v_main_~k~0_BEFORE_CALL_207 v_main_~x~0_BEFORE_CALL_430 v_main_~q~0_BEFORE_CALL_376) (* v_main_~k~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_413 v_main_~s~0_BEFORE_CALL_389))) (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0))))) is different from true [2022-03-20 15:03:45,388 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_321 Int) (v_main_~s~0_BEFORE_CALL_389 Int) (v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int) (v_main_~y~0_BEFORE_CALL_413 Int) (v_main_~q~0_BEFORE_CALL_376 Int) (v_main_~x~0_BEFORE_CALL_430 Int) (v_main_~p~0_BEFORE_CALL_279 Int)) (or (= (+ (* v_main_~y~0_BEFORE_CALL_413 v_main_~r~0_BEFORE_CALL_321) (* v_main_~p~0_BEFORE_CALL_279 v_main_~x~0_BEFORE_CALL_430)) (+ (* v_main_~k~0_BEFORE_CALL_207 v_main_~x~0_BEFORE_CALL_430 v_main_~q~0_BEFORE_CALL_376) (* v_main_~k~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_413 v_main_~s~0_BEFORE_CALL_389))) (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 15:04:15,449 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_321 Int) (v_main_~s~0_BEFORE_CALL_389 Int) (v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int) (v_main_~y~0_BEFORE_CALL_413 Int) (v_main_~q~0_BEFORE_CALL_376 Int) (v_main_~x~0_BEFORE_CALL_430 Int) (v_main_~p~0_BEFORE_CALL_279 Int)) (or (= (+ (* v_main_~y~0_BEFORE_CALL_413 v_main_~r~0_BEFORE_CALL_321) (* v_main_~p~0_BEFORE_CALL_279 v_main_~x~0_BEFORE_CALL_430)) (+ (* v_main_~k~0_BEFORE_CALL_207 v_main_~x~0_BEFORE_CALL_430 v_main_~q~0_BEFORE_CALL_376) (* v_main_~k~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_413 v_main_~s~0_BEFORE_CALL_389))) (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0)))) is different from true [2022-03-20 15:04:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 128 proven. 68 refuted. 12 times theorem prover too weak. 684 trivial. 5 not checked. [2022-03-20 15:04:16,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:04:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782593080] [2022-03-20 15:04:16,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:04:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402798085] [2022-03-20 15:04:16,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402798085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:04:16,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:04:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-03-20 15:04:16,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:04:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585077898] [2022-03-20 15:04:16,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585077898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:04:16,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:04:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:04:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878210868] [2022-03-20 15:04:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:04:16,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:04:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:04:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=507, Unknown=3, NotChecked=144, Total=756 [2022-03-20 15:04:16,530 INFO L87 Difference]: Start difference. First operand 932 states and 1208 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:04:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:04:17,375 INFO L93 Difference]: Finished difference Result 960 states and 1231 transitions. [2022-03-20 15:04:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:04:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 153 [2022-03-20 15:04:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:04:17,380 INFO L225 Difference]: With dead ends: 960 [2022-03-20 15:04:17,380 INFO L226 Difference]: Without dead ends: 954 [2022-03-20 15:04:17,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=159, Invalid=780, Unknown=3, NotChecked=180, Total=1122 [2022-03-20 15:04:17,380 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 53 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:04:17,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 397 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:04:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-20 15:04:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 933. [2022-03-20 15:04:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 595 states have (on average 1.1949579831932773) internal successors, (711), 602 states have internal predecessors, (711), 242 states have call successors, (242), 96 states have call predecessors, (242), 95 states have return successors, (239), 234 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-20 15:04:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1192 transitions. [2022-03-20 15:04:17,570 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1192 transitions. Word has length 153 [2022-03-20 15:04:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:04:17,570 INFO L478 AbstractCegarLoop]: Abstraction has 933 states and 1192 transitions. [2022-03-20 15:04:17,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:04:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1192 transitions. [2022-03-20 15:04:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 15:04:17,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:04:17,572 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-03-20 15:04:17,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 15:04:17,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 15:04:17,787 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:04:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:04:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 9 times [2022-03-20 15:04:17,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:17,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027411087] [2022-03-20 15:04:17,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:04:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 10 times [2022-03-20 15:04:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:04:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131561910] [2022-03-20 15:04:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:04:17,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:04:17,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:04:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957950468] [2022-03-20 15:04:17,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:04:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:04:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:04:17,797 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:04:17,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 15:04:17,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:04:17,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:04:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:04:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:04:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:04:18,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:04:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 15:04:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:04:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131561910] [2022-03-20 15:04:18,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:04:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957950468] [2022-03-20 15:04:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957950468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:04:18,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:04:18,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:04:18,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:04:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027411087] [2022-03-20 15:04:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027411087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:04:18,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:04:18,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:04:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399894989] [2022-03-20 15:04:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:04:18,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:04:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:04:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:04:18,397 INFO L87 Difference]: Start difference. First operand 933 states and 1192 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 15:04:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:04:18,652 INFO L93 Difference]: Finished difference Result 954 states and 1217 transitions. [2022-03-20 15:04:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:04:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2022-03-20 15:04:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:04:18,656 INFO L225 Difference]: With dead ends: 954 [2022-03-20 15:04:18,656 INFO L226 Difference]: Without dead ends: 945 [2022-03-20 15:04:18,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=383, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:04:18,657 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:04:18,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 230 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:04:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-03-20 15:04:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 945. [2022-03-20 15:04:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 607 states have (on average 1.1911037891268534) internal successors, (723), 614 states have internal predecessors, (723), 242 states have call successors, (242), 96 states have call predecessors, (242), 95 states have return successors, (239), 234 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-20 15:04:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1204 transitions. [2022-03-20 15:04:18,810 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1204 transitions. Word has length 156 [2022-03-20 15:04:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:04:18,811 INFO L478 AbstractCegarLoop]: Abstraction has 945 states and 1204 transitions. [2022-03-20 15:04:18,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 15:04:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1204 transitions. [2022-03-20 15:04:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 15:04:18,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:04:18,813 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:04:18,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 15:04:19,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 15:04:19,035 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:04:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:04:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 13 times [2022-03-20 15:04:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:04:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1425266706] [2022-03-20 15:04:19,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:04:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 14 times [2022-03-20 15:04:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:04:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177628043] [2022-03-20 15:04:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:04:19,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:04:19,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:04:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664614923] [2022-03-20 15:04:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:04:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:04:19,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:04:19,044 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:04:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 15:04:19,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:04:19,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:04:19,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 15:04:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:04:20,711 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,713 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,717 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,732 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,738 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:20,744 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:04:50,214 WARN L232 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 136 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:04:54,867 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse19 (= c_main_~x~0 0))) (let ((.cse1 (not .cse19)) (.cse4 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse8 (+ (* c_main_~q~0 c_main_~x~0) c_main_~y~0)) (.cse0 (= c_main_~y~0 0)) (.cse7 (* 2 c_main_~x~0)) (.cse5 (* (- 1) c_main_~y~0))) (or (and (= c_main_~s~0 1) (or (let ((.cse3 (div .cse7 c_main_~x~0))) (let ((.cse6 (* .cse3 c_main_~x~0))) (let ((.cse2 (div (+ c_main_~b~0 .cse4 .cse5 .cse6) .cse6))) (and .cse0 .cse1 (= (+ c_main_~q~0 (* .cse2 .cse3)) 0) (= (mod (+ c_main_~b~0 (* .cse3 c_main_~y~0 0) .cse4 .cse5 .cse6) .cse6) 0) (= .cse2 1))))) (and .cse0 (= .cse8 c_main_~b~0) (= .cse7 0)))) (and (exists ((main_~r~0 Int)) (let ((.cse9 (+ (* (- 1) c_main_~s~0) 1))) (let ((.cse13 (div .cse9 main_~r~0))) (let ((.cse10 (* .cse13 c_main_~x~0)) (.cse11 (* .cse13 main_~r~0 c_main_~y~0))) (and (not (= main_~r~0 0)) (= (mod .cse9 main_~r~0) 0) (= (+ .cse10 .cse11) (+ (* (* main_~r~0 c_main_~y~0) 2) (* 2 c_main_~x~0))) (let ((.cse12 (= c_main_~x~0 0)) (.cse15 (* c_main_~q~0 main_~r~0))) (or (let ((.cse16 (* (- 1) c_main_~q~0))) (and .cse12 (= (+ (* c_main_~q~0 c_main_~x~0) c_main_~y~0) (+ c_main_~b~0 .cse10 .cse11)) (let ((.cse14 (div .cse16 .cse13))) (= (+ (* .cse13 main_~r~0 .cse14) .cse15 1) .cse14)) (= (mod .cse16 .cse13) 0))) (let ((.cse17 (+ c_main_~b~0 .cse10 (* (- 1) c_main_~q~0 c_main_~x~0) (* (- 1) c_main_~y~0) .cse11))) (let ((.cse18 (div .cse17 .cse10))) (and (= (mod .cse17 .cse10) 0) (not .cse12) (= (+ (* .cse13 .cse18 main_~r~0) .cse15 1) .cse18) (= (+ c_main_~q~0 (* .cse13 .cse18)) 0))))))))))) .cse0) (let ((.cse24 (div .cse5 c_main_~y~0))) (let ((.cse21 (div (+ (* (- 1) c_main_~s~0) 1) .cse24))) (let ((.cse28 (* .cse21 c_main_~x~0)) (.cse30 (* .cse21 .cse24 c_main_~y~0))) (and (let ((.cse25 (= .cse8 (+ c_main_~b~0 .cse28 .cse30))) (.cse26 (= .cse21 0)) (.cse23 (* c_main_~q~0 .cse24))) (or (let ((.cse20 (* (- 1) c_main_~q~0))) (and .cse19 (= (mod .cse20 .cse21) 0) (let ((.cse22 (div .cse20 .cse21))) (= .cse22 (+ .cse23 (* .cse21 .cse24 .cse22) 1))) .cse25)) (and (= c_main_~q~0 0) .cse26 .cse25) (let ((.cse27 (+ c_main_~b~0 .cse4 .cse5 .cse28 .cse30))) (let ((.cse29 (div .cse27 .cse28))) (and (not .cse26) (= (mod .cse27 .cse28) 0) .cse1 (= (+ (* .cse21 .cse24 .cse29) .cse23 1) .cse29) (= (+ c_main_~q~0 (* .cse21 .cse29)) 0)))))) (not .cse0) (= (+ .cse28 .cse30) (+ (* 2 (* .cse24 c_main_~y~0)) .cse7))))))))) is different from true [2022-03-20 15:05:25,295 WARN L232 SmtUtils]: Spent 18.71s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:05:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 214 proven. 154 refuted. 0 times theorem prover too weak. 532 trivial. 4 not checked. [2022-03-20 15:05:28,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:05:50,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:05:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 251 proven. 4 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-03-20 15:05:51,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:05:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177628043] [2022-03-20 15:05:51,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:05:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664614923] [2022-03-20 15:05:51,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664614923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:05:51,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:05:51,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 27 [2022-03-20 15:05:51,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:05:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1425266706] [2022-03-20 15:05:51,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1425266706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:05:51,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:05:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:05:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214974530] [2022-03-20 15:05:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:05:51,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:05:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:05:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:05:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=543, Unknown=11, NotChecked=48, Total=702 [2022-03-20 15:05:51,177 INFO L87 Difference]: Start difference. First operand 945 states and 1204 transitions. Second operand has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-20 15:06:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:06:06,182 INFO L93 Difference]: Finished difference Result 955 states and 1215 transitions. [2022-03-20 15:06:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:06:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 157 [2022-03-20 15:06:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:06:06,186 INFO L225 Difference]: With dead ends: 955 [2022-03-20 15:06:06,186 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 15:06:06,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 88.1s TimeCoverageRelationStatistics Valid=123, Invalid=682, Unknown=11, NotChecked=54, Total=870 [2022-03-20 15:06:06,187 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 40 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 15:06:06,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 770 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 632 Invalid, 0 Unknown, 241 Unchecked, 0.9s Time] [2022-03-20 15:06:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 15:06:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 951. [2022-03-20 15:06:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 611 states have (on average 1.1914893617021276) internal successors, (728), 619 states have internal predecessors, (728), 243 states have call successors, (243), 97 states have call predecessors, (243), 96 states have return successors, (240), 234 states have call predecessors, (240), 240 states have call successors, (240) [2022-03-20 15:06:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1211 transitions. [2022-03-20 15:06:06,332 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1211 transitions. Word has length 157 [2022-03-20 15:06:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:06:06,332 INFO L478 AbstractCegarLoop]: Abstraction has 951 states and 1211 transitions. [2022-03-20 15:06:06,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-20 15:06:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1211 transitions. [2022-03-20 15:06:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 15:06:06,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:06:06,334 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:06:06,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 15:06:06,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 15:06:06,535 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:06:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:06:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 15 times [2022-03-20 15:06:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:06:06,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [508460641] [2022-03-20 15:06:06,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:06:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 16 times [2022-03-20 15:06:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:06:06,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403294537] [2022-03-20 15:06:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:06:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:06:06,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:06:06,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493095404] [2022-03-20 15:06:06,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:06:06,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:06:06,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:06:06,543 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:06:06,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 15:06:06,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:06:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:06:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 15:06:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:06:10,847 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:06:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 208 proven. 173 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2022-03-20 15:06:11,221 INFO L328 TraceCheckSpWp]: Computing backward predicates...