/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 08:01:55,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 08:01:55,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 08:01:55,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 08:01:55,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 08:01:55,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 08:01:55,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 08:01:55,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 08:01:55,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 08:01:55,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 08:01:55,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 08:01:55,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 08:01:55,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 08:01:55,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 08:01:55,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 08:01:55,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 08:01:55,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 08:01:55,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 08:01:55,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 08:01:55,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 08:01:55,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 08:01:55,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:01:55,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 08:01:55,961 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 08:01:55,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 08:01:56,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 08:01:56,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 08:01:56,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 08:01:56,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 08:01:56,193 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 08:01:56,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2022-03-19 08:01:56,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5a22bd/653b829652af4e17aa1c9a5f5916fbbc/FLAGfbeba50c9 [2022-03-19 08:01:56,600 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 08:01:56,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2022-03-19 08:01:56,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5a22bd/653b829652af4e17aa1c9a5f5916fbbc/FLAGfbeba50c9 [2022-03-19 08:01:56,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5a22bd/653b829652af4e17aa1c9a5f5916fbbc [2022-03-19 08:01:56,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 08:01:56,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 08:01:56,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 08:01:56,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 08:01:56,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 08:01:56,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369969f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56, skipping insertion in model container [2022-03-19 08:01:56,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 08:01:56,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 08:01:56,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2022-03-19 08:01:56,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:01:56,792 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 08:01:56,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2022-03-19 08:01:56,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:01:56,822 INFO L208 MainTranslator]: Completed translation [2022-03-19 08:01:56,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56 WrapperNode [2022-03-19 08:01:56,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 08:01:56,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 08:01:56,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 08:01:56,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 08:01:56,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 08:01:56,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 08:01:56,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 08:01:56,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 08:01:56,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (1/1) ... [2022-03-19 08:01:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:01:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:01:56,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 08:01:56,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 08:01:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 08:01:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 08:01:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 08:01:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 08:01:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 08:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 08:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 08:01:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 08:01:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 08:01:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 08:01:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 08:01:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 08:01:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 08:01:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 08:01:57,004 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 08:01:57,006 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 08:01:57,113 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 08:01:57,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 08:01:57,118 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-19 08:01:57,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:01:57 BoogieIcfgContainer [2022-03-19 08:01:57,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 08:01:57,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 08:01:57,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 08:01:57,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 08:01:57,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 08:01:56" (1/3) ... [2022-03-19 08:01:57,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175ce278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:01:57, skipping insertion in model container [2022-03-19 08:01:57,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:01:56" (2/3) ... [2022-03-19 08:01:57,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175ce278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:01:57, skipping insertion in model container [2022-03-19 08:01:57,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:01:57" (3/3) ... [2022-03-19 08:01:57,137 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2022-03-19 08:01:57,148 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 08:01:57,148 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 08:01:57,190 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 08:01:57,196 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 [2022-03-19 08:01:57,196 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 08:01:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 08:01:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 08:01:57,214 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:57,214 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:57,214 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2022-03-19 08:01:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089680487] [2022-03-19 08:01:57,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:01:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 2 times [2022-03-19 08:01:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:57,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399436459] [2022-03-19 08:01:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:57,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:01:57,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:01:57,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043735946] [2022-03-19 08:01:57,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:01:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:01:57,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:01:57,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 08:01:57,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 08:01:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:01:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 08:01:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:01:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:01:57,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 08:01:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:01:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399436459] [2022-03-19 08:01:57,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:01:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043735946] [2022-03-19 08:01:57,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043735946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:57,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:57,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:01:57,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:01:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089680487] [2022-03-19 08:01:57,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089680487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:57,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:57,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:01:57,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914483285] [2022-03-19 08:01:57,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:01:57,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 08:01:57,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 08:01:57,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 08:01:57,556 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:01:57,595 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-19 08:01:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 08:01:57,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 08:01:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:01:57,607 INFO L225 Difference]: With dead ends: 26 [2022-03-19 08:01:57,607 INFO L226 Difference]: Without dead ends: 13 [2022-03-19 08:01:57,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 08:01:57,622 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:01:57,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:01:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-19 08:01:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-19 08:01:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-03-19 08:01:57,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-03-19 08:01:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:01:57,658 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-03-19 08:01:57,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-03-19 08:01:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 08:01:57,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:57,659 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:57,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 08:01:57,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 08:01:57,876 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2022-03-19 08:01:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:57,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1647766934] [2022-03-19 08:01:57,878 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:01:57,878 INFO L85 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 2 times [2022-03-19 08:01:57,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:57,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281103905] [2022-03-19 08:01:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:57,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:01:57,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:01:57,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037111110] [2022-03-19 08:01:57,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:01:57,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:01:57,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:01:57,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 08:01:57,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:01:57,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:01:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 08:01:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:01:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:01:58,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:01:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:01:58,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:01:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281103905] [2022-03-19 08:01:58,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:01:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037111110] [2022-03-19 08:01:58,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037111110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:01:58,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:01:58,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-19 08:01:58,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:01:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1647766934] [2022-03-19 08:01:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1647766934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:58,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:58,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 08:01:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110704577] [2022-03-19 08:01:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:01:58,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 08:01:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 08:01:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:01:58,286 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:01:58,319 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-03-19 08:01:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 08:01:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 08:01:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:01:58,320 INFO L225 Difference]: With dead ends: 17 [2022-03-19 08:01:58,320 INFO L226 Difference]: Without dead ends: 14 [2022-03-19 08:01:58,321 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:01:58,322 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:01:58,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:01:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-19 08:01:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-19 08:01:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-19 08:01:58,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-19 08:01:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:01:58,327 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-19 08:01:58,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-19 08:01:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 08:01:58,327 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:58,328 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:58,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 08:01:58,550 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,SelfDestructingSolverStorable1 [2022-03-19 08:01:58,551 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 3 times [2022-03-19 08:01:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082558970] [2022-03-19 08:01:58,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:01:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 4 times [2022-03-19 08:01:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:58,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624429984] [2022-03-19 08:01:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:58,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:01:58,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:01:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217198454] [2022-03-19 08:01:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:01:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:01:58,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:01:58,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 08:01:58,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:01:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:01:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 08:01:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:01:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:01:58,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:01:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 08:01:59,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:01:59,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624429984] [2022-03-19 08:01:59,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:01:59,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217198454] [2022-03-19 08:01:59,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217198454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:01:59,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:01:59,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-03-19 08:01:59,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:01:59,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082558970] [2022-03-19 08:01:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082558970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:59,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:59,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 08:01:59,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805031562] [2022-03-19 08:01:59,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:01:59,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 08:01:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 08:01:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 08:01:59,086 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:01:59,119 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-03-19 08:01:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 08:01:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 08:01:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:01:59,120 INFO L225 Difference]: With dead ends: 18 [2022-03-19 08:01:59,120 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 08:01:59,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:01:59,121 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:01:59,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:01:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 08:01:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-19 08:01:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-19 08:01:59,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-03-19 08:01:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:01:59,126 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-19 08:01:59,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-19 08:01:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 08:01:59,126 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:59,126 INFO L500 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:59,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 08:01:59,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:59,331 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653611, now seen corresponding path program 5 times [2022-03-19 08:01:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739472391] [2022-03-19 08:01:59,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:01:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653611, now seen corresponding path program 6 times [2022-03-19 08:01:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837587040] [2022-03-19 08:01:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:01:59,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:01:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827534396] [2022-03-19 08:01:59,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:01:59,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:01:59,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:01:59,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 08:01:59,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 08:01:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:01:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 08:01:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:01:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:01:59,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:01:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 08:01:59,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:01:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837587040] [2022-03-19 08:01:59,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:01:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827534396] [2022-03-19 08:01:59,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827534396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:01:59,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:01:59,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-03-19 08:01:59,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:01:59,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739472391] [2022-03-19 08:01:59,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739472391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:01:59,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:01:59,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 08:01:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595372310] [2022-03-19 08:01:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:01:59,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 08:01:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 08:01:59,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:01:59,726 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:01:59,767 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-03-19 08:01:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 08:01:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 08:01:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:01:59,768 INFO L225 Difference]: With dead ends: 19 [2022-03-19 08:01:59,768 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 08:01:59,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:01:59,770 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:01:59,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:01:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 08:01:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 08:01:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-19 08:01:59,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-03-19 08:01:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:01:59,774 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-19 08:01:59,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:01:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-19 08:01:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 08:01:59,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:01:59,775 INFO L500 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:01:59,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 08:01:59,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:01:59,987 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:01:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:01:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1394657329, now seen corresponding path program 7 times [2022-03-19 08:01:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:01:59,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [701659239] [2022-03-19 08:01:59,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:01:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1394657329, now seen corresponding path program 8 times [2022-03-19 08:01:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:01:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063929435] [2022-03-19 08:01:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:01:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:00,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021584962] [2022-03-19 08:02:00,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:00,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:00,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:00,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 08:02:00,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:00,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 08:02:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:00,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 08:02:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063929435] [2022-03-19 08:02:00,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021584962] [2022-03-19 08:02:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021584962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:00,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2022-03-19 08:02:00,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [701659239] [2022-03-19 08:02:00,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [701659239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:00,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:00,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 08:02:00,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687009444] [2022-03-19 08:02:00,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:00,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 08:02:00,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:00,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 08:02:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:02:00,464 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:00,520 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-19 08:02:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 08:02:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 08:02:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:00,521 INFO L225 Difference]: With dead ends: 20 [2022-03-19 08:02:00,521 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 08:02:00,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 08:02:00,526 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:00,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:02:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 08:02:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 08:02:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-19 08:02:00,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-03-19 08:02:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:00,535 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-19 08:02:00,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-19 08:02:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 08:02:00,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:00,536 INFO L500 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:00,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:00,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:00,761 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash 284641771, now seen corresponding path program 9 times [2022-03-19 08:02:00,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:00,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684126293] [2022-03-19 08:02:00,762 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash 284641771, now seen corresponding path program 10 times [2022-03-19 08:02:00,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:00,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425662561] [2022-03-19 08:02:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:00,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:00,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420631966] [2022-03-19 08:02:00,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:00,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:00,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:00,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 08:02:00,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 08:02:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 08:02:01,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425662561] [2022-03-19 08:02:01,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420631966] [2022-03-19 08:02:01,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420631966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:01,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:01,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2022-03-19 08:02:01,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684126293] [2022-03-19 08:02:01,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684126293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:01,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:01,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:02:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929467602] [2022-03-19 08:02:01,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:01,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 08:02:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 08:02:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 08:02:01,247 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:01,295 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-19 08:02:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 08:02:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-19 08:02:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:01,296 INFO L225 Difference]: With dead ends: 21 [2022-03-19 08:02:01,296 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 08:02:01,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 08:02:01,297 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:01,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:02:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 08:02:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-19 08:02:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-19 08:02:01,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-03-19 08:02:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:01,302 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-19 08:02:01,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-19 08:02:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 08:02:01,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:01,302 INFO L500 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:01,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:01,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:01,512 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 233897841, now seen corresponding path program 11 times [2022-03-19 08:02:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244609643] [2022-03-19 08:02:01,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 233897841, now seen corresponding path program 12 times [2022-03-19 08:02:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:01,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529711921] [2022-03-19 08:02:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:01,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:01,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827842205] [2022-03-19 08:02:01,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:01,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:01,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:01,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 08:02:01,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 08:02:01,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 08:02:01,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:01,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:02:02,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:02,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529711921] [2022-03-19 08:02:02,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:02,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827842205] [2022-03-19 08:02:02,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827842205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:02,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:02,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2022-03-19 08:02:02,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244609643] [2022-03-19 08:02:02,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244609643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:02,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:02,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 08:02:02,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574487720] [2022-03-19 08:02:02,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:02,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 08:02:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 08:02:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-19 08:02:02,172 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:02,242 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-19 08:02:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:02:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 08:02:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:02,243 INFO L225 Difference]: With dead ends: 22 [2022-03-19 08:02:02,243 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 08:02:02,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:02:02,244 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:02,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:02:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 08:02:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-19 08:02:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-19 08:02:02,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-03-19 08:02:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:02,248 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-19 08:02:02,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-19 08:02:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 08:02:02,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:02,248 INFO L500 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:02,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:02,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:02,459 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1339163989, now seen corresponding path program 13 times [2022-03-19 08:02:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591651537] [2022-03-19 08:02:02,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1339163989, now seen corresponding path program 14 times [2022-03-19 08:02:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:02,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956129392] [2022-03-19 08:02:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:02,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590647952] [2022-03-19 08:02:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:02,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:02,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:02,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 08:02:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 08:02:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:02,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:02,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956129392] [2022-03-19 08:02:02,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590647952] [2022-03-19 08:02:02,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590647952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:02,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:02,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-03-19 08:02:02,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591651537] [2022-03-19 08:02:02,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591651537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:02,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:02,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 08:02:02,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150841683] [2022-03-19 08:02:02,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:02,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 08:02:02,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 08:02:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:02:02,943 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:03,017 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-03-19 08:02:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 08:02:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 08:02:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:03,018 INFO L225 Difference]: With dead ends: 23 [2022-03-19 08:02:03,018 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 08:02:03,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-19 08:02:03,020 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:03,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 08:02:03,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 08:02:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-19 08:02:03,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-03-19 08:02:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:03,024 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-19 08:02:03,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-19 08:02:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 08:02:03,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:03,024 INFO L500 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:03,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 08:02:03,225 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,SelfDestructingSolverStorable7 [2022-03-19 08:02:03,225 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1435526833, now seen corresponding path program 15 times [2022-03-19 08:02:03,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:03,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718719255] [2022-03-19 08:02:03,227 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1435526833, now seen corresponding path program 16 times [2022-03-19 08:02:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:03,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998429110] [2022-03-19 08:02:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:03,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:03,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065105770] [2022-03-19 08:02:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:03,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:03,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 08:02:03,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:03,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:03,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 08:02:03,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:03,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 08:02:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:03,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998429110] [2022-03-19 08:02:03,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065105770] [2022-03-19 08:02:03,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065105770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:03,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:03,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 14 [2022-03-19 08:02:03,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718719255] [2022-03-19 08:02:03,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718719255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:03,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:03,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 08:02:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754062060] [2022-03-19 08:02:03,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:03,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 08:02:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 08:02:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 08:02:03,948 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:04,022 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-19 08:02:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 08:02:04,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 08:02:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:04,024 INFO L225 Difference]: With dead ends: 24 [2022-03-19 08:02:04,024 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 08:02:04,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-19 08:02:04,025 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:04,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 08:02:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-19 08:02:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-19 08:02:04,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-03-19 08:02:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:04,029 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-19 08:02:04,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-19 08:02:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 08:02:04,030 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:04,030 INFO L500 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:04,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:04,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:04,243 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1551596395, now seen corresponding path program 17 times [2022-03-19 08:02:04,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:04,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [786409328] [2022-03-19 08:02:04,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1551596395, now seen corresponding path program 18 times [2022-03-19 08:02:04,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:04,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234739365] [2022-03-19 08:02:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:04,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:04,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709946490] [2022-03-19 08:02:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:04,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:04,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 08:02:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 08:02:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 08:02:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:04,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 08:02:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:05,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234739365] [2022-03-19 08:02:05,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:05,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709946490] [2022-03-19 08:02:05,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709946490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:05,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:05,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 15 [2022-03-19 08:02:05,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:05,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [786409328] [2022-03-19 08:02:05,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [786409328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:05,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:05,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:02:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93638184] [2022-03-19 08:02:05,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:05,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:02:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:02:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-19 08:02:05,127 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:05,209 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-03-19 08:02:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:02:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 08:02:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:05,211 INFO L225 Difference]: With dead ends: 25 [2022-03-19 08:02:05,211 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 08:02:05,212 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 08:02:05,212 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:05,213 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 08:02:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-19 08:02:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-19 08:02:05,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-03-19 08:02:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:05,217 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-19 08:02:05,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-19 08:02:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 08:02:05,217 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:05,217 INFO L500 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:05,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:05,431 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,SelfDestructingSolverStorable9 [2022-03-19 08:02:05,431 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 854785521, now seen corresponding path program 19 times [2022-03-19 08:02:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1086354867] [2022-03-19 08:02:05,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 854785521, now seen corresponding path program 20 times [2022-03-19 08:02:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86751239] [2022-03-19 08:02:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:05,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:05,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931920380] [2022-03-19 08:02:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:05,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:05,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 08:02:05,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 08:02:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:05,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 08:02:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86751239] [2022-03-19 08:02:06,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:06,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931920380] [2022-03-19 08:02:06,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931920380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:06,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:06,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 16 [2022-03-19 08:02:06,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:06,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1086354867] [2022-03-19 08:02:06,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1086354867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:06,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:06,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 08:02:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858592728] [2022-03-19 08:02:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:06,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 08:02:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 08:02:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-19 08:02:06,451 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:06,541 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-19 08:02:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 08:02:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 08:02:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:06,543 INFO L225 Difference]: With dead ends: 26 [2022-03-19 08:02:06,543 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 08:02:06,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 08:02:06,544 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:06,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 106 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 08:02:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 08:02:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-19 08:02:06,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-03-19 08:02:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:06,548 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-19 08:02:06,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-19 08:02:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 08:02:06,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:06,549 INFO L500 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:06,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:06,763 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,SelfDestructingSolverStorable10 [2022-03-19 08:02:06,764 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash 728484907, now seen corresponding path program 21 times [2022-03-19 08:02:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723988436] [2022-03-19 08:02:06,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 728484907, now seen corresponding path program 22 times [2022-03-19 08:02:06,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:06,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043097431] [2022-03-19 08:02:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:06,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:06,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92129302] [2022-03-19 08:02:06,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:06,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:06,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:06,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:06,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 08:02:06,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:06,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 08:02:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:07,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-19 08:02:07,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043097431] [2022-03-19 08:02:07,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92129302] [2022-03-19 08:02:07,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92129302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:07,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:07,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 17 [2022-03-19 08:02:07,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723988436] [2022-03-19 08:02:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723988436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:07,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:07,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 08:02:07,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882994668] [2022-03-19 08:02:07,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:07,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 08:02:07,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:07,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 08:02:07,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-19 08:02:07,890 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:08,003 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-03-19 08:02:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 08:02:08,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 08:02:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:08,004 INFO L225 Difference]: With dead ends: 27 [2022-03-19 08:02:08,004 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 08:02:08,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 08:02:08,005 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:08,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 114 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 08:02:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-19 08:02:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-19 08:02:08,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-03-19 08:02:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:08,010 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-19 08:02:08,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-19 08:02:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 08:02:08,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:08,011 INFO L500 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:08,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:08,227 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,SelfDestructingSolverStorable11 [2022-03-19 08:02:08,227 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1108133169, now seen corresponding path program 23 times [2022-03-19 08:02:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085830865] [2022-03-19 08:02:08,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1108133169, now seen corresponding path program 24 times [2022-03-19 08:02:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893787443] [2022-03-19 08:02:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:08,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:08,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179447049] [2022-03-19 08:02:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:08,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:08,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:08,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 08:02:08,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:02:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 08:02:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:08,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 08:02:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893787443] [2022-03-19 08:02:09,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179447049] [2022-03-19 08:02:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179447049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:09,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 18 [2022-03-19 08:02:09,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:09,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085830865] [2022-03-19 08:02:09,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085830865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:09,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 08:02:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125021986] [2022-03-19 08:02:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:09,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 08:02:09,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 08:02:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-19 08:02:09,566 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:09,693 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-19 08:02:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 08:02:09,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 08:02:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:09,694 INFO L225 Difference]: With dead ends: 28 [2022-03-19 08:02:09,694 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 08:02:09,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-19 08:02:09,695 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:09,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 122 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 08:02:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 08:02:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-19 08:02:09,702 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-03-19 08:02:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:09,702 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-19 08:02:09,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-19 08:02:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 08:02:09,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:09,703 INFO L500 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:09,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:09,919 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,SelfDestructingSolverStorable12 [2022-03-19 08:02:09,919 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -7672597, now seen corresponding path program 25 times [2022-03-19 08:02:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:09,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232003546] [2022-03-19 08:02:09,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -7672597, now seen corresponding path program 26 times [2022-03-19 08:02:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511328086] [2022-03-19 08:02:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:09,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:09,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964621349] [2022-03-19 08:02:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:09,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:09,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:09,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 08:02:09,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:09,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:09,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 08:02:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:10,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 08:02:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511328086] [2022-03-19 08:02:11,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964621349] [2022-03-19 08:02:11,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964621349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:11,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:11,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5] total 19 [2022-03-19 08:02:11,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:11,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232003546] [2022-03-19 08:02:11,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232003546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:11,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:11,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 08:02:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474585545] [2022-03-19 08:02:11,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:11,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 08:02:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 08:02:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-19 08:02:11,187 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:11,303 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-03-19 08:02:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 08:02:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 08:02:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:11,305 INFO L225 Difference]: With dead ends: 29 [2022-03-19 08:02:11,305 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 08:02:11,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:02:11,306 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:11,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 130 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 08:02:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 08:02:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-03-19 08:02:11,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-03-19 08:02:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:11,311 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-03-19 08:02:11,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-03-19 08:02:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 08:02:11,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:11,312 INFO L500 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:11,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:11,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:11,515 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash -237912975, now seen corresponding path program 27 times [2022-03-19 08:02:11,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:11,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421618092] [2022-03-19 08:02:11,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash -237912975, now seen corresponding path program 28 times [2022-03-19 08:02:11,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:11,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676263607] [2022-03-19 08:02:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:11,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:11,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:11,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127610996] [2022-03-19 08:02:11,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:11,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:11,527 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:11,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 08:02:11,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:11,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 08:02:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 08:02:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676263607] [2022-03-19 08:02:12,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127610996] [2022-03-19 08:02:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127610996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:12,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5] total 20 [2022-03-19 08:02:12,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421618092] [2022-03-19 08:02:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421618092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:12,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 08:02:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757305887] [2022-03-19 08:02:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:12,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 08:02:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 08:02:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:02:12,945 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:13,104 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-19 08:02:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 08:02:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 08:02:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:13,105 INFO L225 Difference]: With dead ends: 30 [2022-03-19 08:02:13,105 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 08:02:13,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-19 08:02:13,106 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:13,106 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 138 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 08:02:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 08:02:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-19 08:02:13,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-03-19 08:02:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:13,111 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-19 08:02:13,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-19 08:02:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 08:02:13,112 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:13,112 INFO L500 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:13,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 08:02:13,315 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,SelfDestructingSolverStorable14 [2022-03-19 08:02:13,315 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1214569899, now seen corresponding path program 29 times [2022-03-19 08:02:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008020808] [2022-03-19 08:02:13,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1214569899, now seen corresponding path program 30 times [2022-03-19 08:02:13,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680500368] [2022-03-19 08:02:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:13,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:13,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618555907] [2022-03-19 08:02:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:13,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:02:13,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 08:02:13,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 08:02:13,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 08:02:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:13,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 08:02:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680500368] [2022-03-19 08:02:14,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618555907] [2022-03-19 08:02:14,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618555907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:14,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5] total 21 [2022-03-19 08:02:14,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008020808] [2022-03-19 08:02:14,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008020808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:14,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 08:02:14,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452314611] [2022-03-19 08:02:14,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:14,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 08:02:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 08:02:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-19 08:02:14,988 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:15,134 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-03-19 08:02:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 08:02:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 08:02:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:15,135 INFO L225 Difference]: With dead ends: 31 [2022-03-19 08:02:15,135 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 08:02:15,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 15 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-19 08:02:15,136 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:15,136 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 146 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:02:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 08:02:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-19 08:02:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-19 08:02:15,140 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-03-19 08:02:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:15,141 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-19 08:02:15,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-19 08:02:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 08:02:15,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:15,141 INFO L500 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:15,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:15,359 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,SelfDestructingSolverStorable15 [2022-03-19 08:02:15,359 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1003101263, now seen corresponding path program 31 times [2022-03-19 08:02:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577338055] [2022-03-19 08:02:15,361 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1003101263, now seen corresponding path program 32 times [2022-03-19 08:02:15,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:15,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584893977] [2022-03-19 08:02:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:15,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594777104] [2022-03-19 08:02:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:15,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:15,381 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) [2022-03-19 08:02:15,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 08:02:15,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 08:02:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:15,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 08:02:17,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584893977] [2022-03-19 08:02:17,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594777104] [2022-03-19 08:02:17,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594777104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:17,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:17,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5] total 22 [2022-03-19 08:02:17,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577338055] [2022-03-19 08:02:17,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577338055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:17,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:17,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 08:02:17,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829222176] [2022-03-19 08:02:17,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:17,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 08:02:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 08:02:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-19 08:02:17,171 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:17,347 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-19 08:02:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 08:02:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 08:02:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:17,348 INFO L225 Difference]: With dead ends: 32 [2022-03-19 08:02:17,348 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 08:02:17,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-19 08:02:17,349 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:17,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 08:02:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 08:02:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-19 08:02:17,354 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-03-19 08:02:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:17,355 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-19 08:02:17,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-19 08:02:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 08:02:17,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:17,355 INFO L500 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:17,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:17,556 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,SelfDestructingSolverStorable16 [2022-03-19 08:02:17,556 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1031430549, now seen corresponding path program 33 times [2022-03-19 08:02:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099573295] [2022-03-19 08:02:17,557 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1031430549, now seen corresponding path program 34 times [2022-03-19 08:02:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676386966] [2022-03-19 08:02:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:17,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:17,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595440044] [2022-03-19 08:02:17,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:17,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:17,571 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) [2022-03-19 08:02:17,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 08:02:17,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:17,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 08:02:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:17,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 08:02:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:19,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676386966] [2022-03-19 08:02:19,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595440044] [2022-03-19 08:02:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595440044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:19,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:19,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5] total 23 [2022-03-19 08:02:19,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099573295] [2022-03-19 08:02:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099573295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:19,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:19,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 08:02:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812166437] [2022-03-19 08:02:19,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:19,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 08:02:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 08:02:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-19 08:02:19,480 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:19,662 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-03-19 08:02:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 08:02:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 08:02:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:19,662 INFO L225 Difference]: With dead ends: 33 [2022-03-19 08:02:19,662 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 08:02:19,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 17 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-19 08:02:19,663 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:19,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 162 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 08:02:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 08:02:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-19 08:02:19,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-03-19 08:02:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:19,670 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-19 08:02:19,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-19 08:02:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 08:02:19,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:19,670 INFO L500 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:19,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:19,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 08:02:19,891 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1909638415, now seen corresponding path program 35 times [2022-03-19 08:02:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1425030145] [2022-03-19 08:02:19,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1909638415, now seen corresponding path program 36 times [2022-03-19 08:02:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:19,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730841510] [2022-03-19 08:02:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:19,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:19,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840859250] [2022-03-19 08:02:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:19,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:19,931 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) [2022-03-19 08:02:19,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 08:02:19,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 08:02:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 08:02:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:20,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-19 08:02:22,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730841510] [2022-03-19 08:02:22,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840859250] [2022-03-19 08:02:22,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840859250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:22,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:22,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5] total 24 [2022-03-19 08:02:22,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1425030145] [2022-03-19 08:02:22,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1425030145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:22,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:22,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 08:02:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114426068] [2022-03-19 08:02:22,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:22,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 08:02:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:22,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 08:02:22,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-19 08:02:22,081 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:22,267 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-19 08:02:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 08:02:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 08:02:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:22,268 INFO L225 Difference]: With dead ends: 34 [2022-03-19 08:02:22,268 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 08:02:22,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 18 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:02:22,269 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:22,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 170 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 08:02:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 08:02:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-19 08:02:22,275 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-03-19 08:02:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:22,275 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-19 08:02:22,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-19 08:02:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 08:02:22,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:22,276 INFO L500 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:22,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:22,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:22,476 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 930688811, now seen corresponding path program 37 times [2022-03-19 08:02:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113061325] [2022-03-19 08:02:22,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 930688811, now seen corresponding path program 38 times [2022-03-19 08:02:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055326887] [2022-03-19 08:02:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:22,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:22,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:22,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20456402] [2022-03-19 08:02:22,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:22,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:22,489 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) [2022-03-19 08:02:22,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 08:02:22,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:22,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 08:02:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:22,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-19 08:02:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055326887] [2022-03-19 08:02:25,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20456402] [2022-03-19 08:02:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20456402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:25,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:25,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5] total 25 [2022-03-19 08:02:25,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113061325] [2022-03-19 08:02:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113061325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:25,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:25,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 08:02:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519230414] [2022-03-19 08:02:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:25,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 08:02:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 08:02:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:02:25,307 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:25,602 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-03-19 08:02:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 08:02:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 08:02:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:25,603 INFO L225 Difference]: With dead ends: 35 [2022-03-19 08:02:25,603 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 08:02:25,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 19 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-19 08:02:25,604 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:25,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 178 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:02:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 08:02:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 08:02:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-19 08:02:25,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-03-19 08:02:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:25,609 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-19 08:02:25,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-19 08:02:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 08:02:25,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:25,610 INFO L500 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:25,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:25,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:25,811 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1213480399, now seen corresponding path program 39 times [2022-03-19 08:02:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:25,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [576214713] [2022-03-19 08:02:25,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1213480399, now seen corresponding path program 40 times [2022-03-19 08:02:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:25,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376702127] [2022-03-19 08:02:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:25,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:25,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015863973] [2022-03-19 08:02:25,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:25,822 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) [2022-03-19 08:02:25,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 08:02:25,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:25,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:25,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 08:02:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:26,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-19 08:02:28,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:28,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376702127] [2022-03-19 08:02:28,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:28,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015863973] [2022-03-19 08:02:28,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015863973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:28,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:28,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5] total 26 [2022-03-19 08:02:28,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [576214713] [2022-03-19 08:02:28,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [576214713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:28,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:28,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 08:02:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370219119] [2022-03-19 08:02:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:28,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 08:02:28,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 08:02:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-19 08:02:28,455 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:28,667 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-19 08:02:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 08:02:28,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 08:02:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:28,668 INFO L225 Difference]: With dead ends: 36 [2022-03-19 08:02:28,668 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 08:02:28,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 20 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-19 08:02:28,669 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:28,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 186 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 08:02:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 08:02:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-19 08:02:28,675 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-03-19 08:02:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:28,675 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-19 08:02:28,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-19 08:02:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 08:02:28,676 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:28,676 INFO L500 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:28,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:28,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:28,883 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1036750827, now seen corresponding path program 41 times [2022-03-19 08:02:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961429738] [2022-03-19 08:02:28,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1036750827, now seen corresponding path program 42 times [2022-03-19 08:02:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797821541] [2022-03-19 08:02:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:28,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:28,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948347459] [2022-03-19 08:02:28,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:28,894 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) [2022-03-19 08:02:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 08:02:28,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 08:02:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:28,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-19 08:02:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:29,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 08:02:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797821541] [2022-03-19 08:02:31,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948347459] [2022-03-19 08:02:31,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948347459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:31,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:31,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5] total 27 [2022-03-19 08:02:31,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961429738] [2022-03-19 08:02:31,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961429738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:31,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:31,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 08:02:31,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30659569] [2022-03-19 08:02:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:31,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 08:02:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 08:02:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-19 08:02:31,842 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:32,078 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-03-19 08:02:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 08:02:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 08:02:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:32,079 INFO L225 Difference]: With dead ends: 37 [2022-03-19 08:02:32,079 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 08:02:32,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 21 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-19 08:02:32,080 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:32,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 194 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 08:02:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 08:02:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-03-19 08:02:32,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-03-19 08:02:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:32,087 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-03-19 08:02:32,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-03-19 08:02:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 08:02:32,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:32,088 INFO L500 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:32,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 08:02:32,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:32,295 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2074442097, now seen corresponding path program 43 times [2022-03-19 08:02:32,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:32,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051113010] [2022-03-19 08:02:32,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2074442097, now seen corresponding path program 44 times [2022-03-19 08:02:32,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:32,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743786094] [2022-03-19 08:02:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:32,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:32,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984746042] [2022-03-19 08:02:32,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:32,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:32,305 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) [2022-03-19 08:02:32,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 08:02:32,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:32,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 08:02:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:32,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-03-19 08:02:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743786094] [2022-03-19 08:02:35,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984746042] [2022-03-19 08:02:35,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984746042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:35,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:35,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5] total 28 [2022-03-19 08:02:35,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051113010] [2022-03-19 08:02:35,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051113010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:35,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:35,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 08:02:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497274174] [2022-03-19 08:02:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:35,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 08:02:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 08:02:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-03-19 08:02:35,640 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:35,876 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-19 08:02:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 08:02:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 08:02:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:35,877 INFO L225 Difference]: With dead ends: 38 [2022-03-19 08:02:35,877 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 08:02:35,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-19 08:02:35,878 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:35,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 202 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:02:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 08:02:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 08:02:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-19 08:02:35,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-03-19 08:02:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:35,883 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-19 08:02:35,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-19 08:02:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 08:02:35,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:35,884 INFO L500 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:35,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:36,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:36,096 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash -116866901, now seen corresponding path program 45 times [2022-03-19 08:02:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:36,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685940613] [2022-03-19 08:02:36,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash -116866901, now seen corresponding path program 46 times [2022-03-19 08:02:36,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:36,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329665980] [2022-03-19 08:02:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:36,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:36,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113655191] [2022-03-19 08:02:36,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:36,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:36,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:36,106 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) [2022-03-19 08:02:36,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 08:02:36,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:36,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:36,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 08:02:36,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:36,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-19 08:02:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329665980] [2022-03-19 08:02:39,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113655191] [2022-03-19 08:02:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113655191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:39,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:39,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5] total 29 [2022-03-19 08:02:39,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685940613] [2022-03-19 08:02:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685940613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:39,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:39,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 08:02:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762101970] [2022-03-19 08:02:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:39,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 08:02:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 08:02:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-19 08:02:39,934 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:40,214 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-03-19 08:02:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 08:02:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 08:02:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:40,215 INFO L225 Difference]: With dead ends: 39 [2022-03-19 08:02:40,215 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 08:02:40,216 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 23 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-19 08:02:40,216 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:40,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 210 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:02:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 08:02:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 08:02:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-03-19 08:02:40,223 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-03-19 08:02:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:40,223 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-03-19 08:02:40,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-03-19 08:02:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 08:02:40,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:40,224 INFO L500 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:40,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 08:02:40,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:40,443 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 672030897, now seen corresponding path program 47 times [2022-03-19 08:02:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [800721800] [2022-03-19 08:02:40,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 672030897, now seen corresponding path program 48 times [2022-03-19 08:02:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567454471] [2022-03-19 08:02:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:40,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:40,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92601572] [2022-03-19 08:02:40,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:40,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:40,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:40,453 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) [2022-03-19 08:02:40,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 08:02:40,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 08:02:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:40,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 08:02:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:40,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 08:02:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567454471] [2022-03-19 08:02:44,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92601572] [2022-03-19 08:02:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92601572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:44,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5] total 30 [2022-03-19 08:02:44,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [800721800] [2022-03-19 08:02:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [800721800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:44,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 08:02:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48555740] [2022-03-19 08:02:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:44,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 08:02:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 08:02:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-03-19 08:02:44,722 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:45,043 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-19 08:02:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 08:02:45,044 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 08:02:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:45,044 INFO L225 Difference]: With dead ends: 40 [2022-03-19 08:02:45,044 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 08:02:45,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 24 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-19 08:02:45,045 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:45,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 218 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:02:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 08:02:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 08:02:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-19 08:02:45,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-03-19 08:02:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:45,052 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-19 08:02:45,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-19 08:02:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 08:02:45,052 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:45,052 INFO L500 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:45,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:45,253 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,SelfDestructingSolverStorable24 [2022-03-19 08:02:45,253 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash -641941141, now seen corresponding path program 49 times [2022-03-19 08:02:45,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:45,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [188985078] [2022-03-19 08:02:45,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash -641941141, now seen corresponding path program 50 times [2022-03-19 08:02:45,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:45,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836470914] [2022-03-19 08:02:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:45,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063349394] [2022-03-19 08:02:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:02:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:45,263 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) [2022-03-19 08:02:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 08:02:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:02:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:45,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 08:02:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:45,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 08:02:50,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836470914] [2022-03-19 08:02:50,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063349394] [2022-03-19 08:02:50,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063349394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:50,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:50,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5] total 31 [2022-03-19 08:02:50,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:50,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [188985078] [2022-03-19 08:02:50,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [188985078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:50,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:50,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 08:02:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133671160] [2022-03-19 08:02:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:50,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 08:02:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 08:02:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-03-19 08:02:50,088 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:50,395 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-03-19 08:02:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 08:02:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 08:02:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:50,396 INFO L225 Difference]: With dead ends: 41 [2022-03-19 08:02:50,396 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 08:02:50,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 25 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-19 08:02:50,397 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:50,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 226 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:02:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 08:02:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 08:02:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-03-19 08:02:50,404 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-03-19 08:02:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:50,404 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-03-19 08:02:50,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-03-19 08:02:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 08:02:50,405 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:50,405 INFO L500 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:50,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 08:02:50,607 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,SelfDestructingSolverStorable25 [2022-03-19 08:02:50,607 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1574598641, now seen corresponding path program 51 times [2022-03-19 08:02:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580129499] [2022-03-19 08:02:50,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1574598641, now seen corresponding path program 52 times [2022-03-19 08:02:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66498096] [2022-03-19 08:02:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:50,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:50,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:50,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487073498] [2022-03-19 08:02:50,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:02:50,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:50,616 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) [2022-03-19 08:02:50,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 08:02:50,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:02:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:50,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-19 08:02:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:51,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:02:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 08:02:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:02:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66498096] [2022-03-19 08:02:56,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:02:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487073498] [2022-03-19 08:02:56,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487073498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:02:56,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:02:56,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 5] total 32 [2022-03-19 08:02:56,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:02:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580129499] [2022-03-19 08:02:56,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580129499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:02:56,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:02:56,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 08:02:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116868222] [2022-03-19 08:02:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:02:56,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 08:02:56,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 08:02:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-03-19 08:02:56,215 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:02:56,556 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-19 08:02:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 08:02:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 08:02:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:02:56,557 INFO L225 Difference]: With dead ends: 42 [2022-03-19 08:02:56,557 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 08:02:56,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 26 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 08:02:56,558 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:02:56,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 234 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:02:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 08:02:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 08:02:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-19 08:02:56,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-03-19 08:02:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:02:56,563 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-19 08:02:56,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:02:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-19 08:02:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 08:02:56,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:02:56,564 INFO L500 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:02:56,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 08:02:56,764 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,SelfDestructingSolverStorable26 [2022-03-19 08:02:56,764 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:02:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:02:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1567855147, now seen corresponding path program 53 times [2022-03-19 08:02:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:02:56,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117221422] [2022-03-19 08:02:56,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:02:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1567855147, now seen corresponding path program 54 times [2022-03-19 08:02:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:02:56,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609626764] [2022-03-19 08:02:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:02:56,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:02:56,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:02:56,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72198722] [2022-03-19 08:02:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:02:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:02:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:02:56,775 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) [2022-03-19 08:02:56,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 08:02:56,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-19 08:02:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:02:56,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-19 08:02:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:02:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:02:57,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-03-19 08:03:03,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609626764] [2022-03-19 08:03:03,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:03:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72198722] [2022-03-19 08:03:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72198722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:03,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:03,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 5] total 33 [2022-03-19 08:03:03,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117221422] [2022-03-19 08:03:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117221422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:03,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:03,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 08:03:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120735425] [2022-03-19 08:03:03,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:03,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 08:03:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 08:03:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 08:03:03,471 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:03,839 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-03-19 08:03:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 08:03:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 08:03:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:03,840 INFO L225 Difference]: With dead ends: 43 [2022-03-19 08:03:03,840 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 08:03:03,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 27 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 08:03:03,840 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:03,841 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 242 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:03:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 08:03:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-19 08:03:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-19 08:03:03,847 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-03-19 08:03:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:03,847 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-19 08:03:03,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-19 08:03:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 08:03:03,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:03,847 INFO L500 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:03,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 08:03:04,048 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,SelfDestructingSolverStorable27 [2022-03-19 08:03:04,048 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1358806833, now seen corresponding path program 55 times [2022-03-19 08:03:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:04,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [325558288] [2022-03-19 08:03:04,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:03:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1358806833, now seen corresponding path program 56 times [2022-03-19 08:03:04,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:04,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30069202] [2022-03-19 08:03:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:04,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:04,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:03:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038601162] [2022-03-19 08:03:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:03:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:04,057 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) [2022-03-19 08:03:04,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 08:03:04,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:03:04,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:04,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-19 08:03:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:03:04,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-19 08:03:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30069202] [2022-03-19 08:03:11,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:03:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038601162] [2022-03-19 08:03:11,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038601162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:11,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:11,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 5] total 34 [2022-03-19 08:03:11,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [325558288] [2022-03-19 08:03:11,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [325558288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:11,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:11,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 08:03:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112687196] [2022-03-19 08:03:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:11,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 08:03:11,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 08:03:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 08:03:11,552 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:11,948 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-19 08:03:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 08:03:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 08:03:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:11,949 INFO L225 Difference]: With dead ends: 44 [2022-03-19 08:03:11,949 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 08:03:11,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 28 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 08:03:11,950 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:11,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 250 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:03:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 08:03:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 08:03:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-19 08:03:11,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-03-19 08:03:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:11,960 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-19 08:03:11,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-19 08:03:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 08:03:11,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:11,960 INFO L500 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:11,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 08:03:12,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 08:03:12,163 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -826723605, now seen corresponding path program 57 times [2022-03-19 08:03:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1615315919] [2022-03-19 08:03:12,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:03:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -826723605, now seen corresponding path program 58 times [2022-03-19 08:03:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379979673] [2022-03-19 08:03:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:12,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:03:12,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941672538] [2022-03-19 08:03:12,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:03:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:12,173 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) [2022-03-19 08:03:12,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 08:03:12,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:03:12,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:12,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-19 08:03:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:03:12,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-03-19 08:03:20,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379979673] [2022-03-19 08:03:20,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:03:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941672538] [2022-03-19 08:03:20,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941672538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:20,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:20,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 5] total 35 [2022-03-19 08:03:20,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:20,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1615315919] [2022-03-19 08:03:20,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1615315919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:20,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:20,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 08:03:20,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957172196] [2022-03-19 08:03:20,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:20,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 08:03:20,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 08:03:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 08:03:20,676 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:21,066 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-03-19 08:03:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 08:03:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-19 08:03:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:21,067 INFO L225 Difference]: With dead ends: 45 [2022-03-19 08:03:21,067 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 08:03:21,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 29 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 08:03:21,068 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:21,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 258 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:03:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 08:03:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-19 08:03:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-03-19 08:03:21,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-03-19 08:03:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:21,077 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-03-19 08:03:21,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-03-19 08:03:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 08:03:21,077 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:21,077 INFO L500 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:21,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 08:03:21,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:21,287 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 141309553, now seen corresponding path program 59 times [2022-03-19 08:03:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:21,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483059268] [2022-03-19 08:03:21,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:03:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 141309553, now seen corresponding path program 60 times [2022-03-19 08:03:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:21,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801508113] [2022-03-19 08:03:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:21,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:03:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332127728] [2022-03-19 08:03:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:03:21,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:21,298 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) [2022-03-19 08:03:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 08:03:21,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-19 08:03:21,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:21,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-19 08:03:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:03:22,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-03-19 08:03:33,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801508113] [2022-03-19 08:03:33,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:03:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332127728] [2022-03-19 08:03:33,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332127728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:33,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:33,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 5] total 36 [2022-03-19 08:03:33,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483059268] [2022-03-19 08:03:33,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483059268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:33,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:33,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 08:03:33,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80768184] [2022-03-19 08:03:33,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:33,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 08:03:33,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 08:03:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 08:03:33,020 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:33,489 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-19 08:03:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 08:03:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 08:03:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:33,489 INFO L225 Difference]: With dead ends: 46 [2022-03-19 08:03:33,490 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 08:03:33,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 30 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 08:03:33,490 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:33,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 266 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:03:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 08:03:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 08:03:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-19 08:03:33,496 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-03-19 08:03:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:33,496 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-19 08:03:33,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-19 08:03:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 08:03:33,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:33,497 INFO L500 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:33,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 08:03:33,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:33,699 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 85566379, now seen corresponding path program 61 times [2022-03-19 08:03:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1966394756] [2022-03-19 08:03:33,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:03:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 85566379, now seen corresponding path program 62 times [2022-03-19 08:03:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745013771] [2022-03-19 08:03:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:33,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:03:33,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017539733] [2022-03-19 08:03:33,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:03:33,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:33,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:33,709 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) [2022-03-19 08:03:33,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 08:03:33,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:03:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:33,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-19 08:03:33,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:03:34,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-19 08:03:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745013771] [2022-03-19 08:03:45,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:03:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017539733] [2022-03-19 08:03:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017539733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:45,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:45,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5] total 37 [2022-03-19 08:03:45,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1966394756] [2022-03-19 08:03:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1966394756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:45,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:45,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 08:03:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330413760] [2022-03-19 08:03:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:45,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 08:03:45,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 08:03:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 08:03:45,953 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:46,460 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-03-19 08:03:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 08:03:46,460 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 08:03:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:46,461 INFO L225 Difference]: With dead ends: 47 [2022-03-19 08:03:46,461 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 08:03:46,461 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 31 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 08:03:46,461 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:46,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 274 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:03:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 08:03:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 08:03:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-03-19 08:03:46,468 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-03-19 08:03:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:46,469 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-03-19 08:03:46,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:03:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-03-19 08:03:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 08:03:46,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:46,469 INFO L500 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:46,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 08:03:46,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:46,678 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1642472015, now seen corresponding path program 63 times [2022-03-19 08:03:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351993251] [2022-03-19 08:03:46,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:03:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1642472015, now seen corresponding path program 64 times [2022-03-19 08:03:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777108605] [2022-03-19 08:03:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:46,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:03:46,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762521145] [2022-03-19 08:03:46,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:03:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:46,688 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) [2022-03-19 08:03:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 08:03:46,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:03:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:46,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-19 08:03:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:03:47,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:04:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-19 08:04:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:04:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777108605] [2022-03-19 08:04:00,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:04:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762521145] [2022-03-19 08:04:00,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762521145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:04:00,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:04:00,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 5] total 38 [2022-03-19 08:04:00,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:04:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351993251] [2022-03-19 08:04:00,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351993251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:04:00,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:04:00,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 08:04:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728135573] [2022-03-19 08:04:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:04:00,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 08:04:00,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 08:04:00,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 08:04:00,653 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:04:01,176 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-19 08:04:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 08:04:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 08:04:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:04:01,176 INFO L225 Difference]: With dead ends: 48 [2022-03-19 08:04:01,176 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 08:04:01,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 32 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 08:04:01,177 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:04:01,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:04:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 08:04:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 08:04:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-19 08:04:01,184 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-03-19 08:04:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:04:01,184 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-19 08:04:01,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-19 08:04:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 08:04:01,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:04:01,185 INFO L500 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:04:01,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 08:04:01,385 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,SelfDestructingSolverStorable32 [2022-03-19 08:04:01,385 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:04:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:04:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 622912619, now seen corresponding path program 65 times [2022-03-19 08:04:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:01,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349117786] [2022-03-19 08:04:01,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:04:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 622912619, now seen corresponding path program 66 times [2022-03-19 08:04:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:04:01,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520580168] [2022-03-19 08:04:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:04:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:04:01,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:04:01,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252814308] [2022-03-19 08:04:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:04:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:04:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:04:01,395 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) [2022-03-19 08:04:01,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 08:04:01,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-19 08:04:01,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:04:01,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-19 08:04:01,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:04:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:04:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:04:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-03-19 08:04:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:04:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520580168] [2022-03-19 08:04:17,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:04:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252814308] [2022-03-19 08:04:17,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252814308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:04:17,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:04:17,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 39 [2022-03-19 08:04:17,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:04:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349117786] [2022-03-19 08:04:17,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349117786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:04:17,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:04:17,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 08:04:17,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465073623] [2022-03-19 08:04:17,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:04:17,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 08:04:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 08:04:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 08:04:17,971 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:04:18,505 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-03-19 08:04:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 08:04:18,505 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-19 08:04:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:04:18,506 INFO L225 Difference]: With dead ends: 49 [2022-03-19 08:04:18,506 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 08:04:18,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 33 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 08:04:18,506 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:04:18,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 290 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:04:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 08:04:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 08:04:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-03-19 08:04:18,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-03-19 08:04:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:04:18,515 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-03-19 08:04:18,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-03-19 08:04:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 08:04:18,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:04:18,516 INFO L500 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:04:18,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 08:04:18,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:04:18,719 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:04:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:04:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2130359537, now seen corresponding path program 67 times [2022-03-19 08:04:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330432081] [2022-03-19 08:04:18,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:04:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2130359537, now seen corresponding path program 68 times [2022-03-19 08:04:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:04:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284622977] [2022-03-19 08:04:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:04:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:04:18,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:04:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840784958] [2022-03-19 08:04:18,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:04:18,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:04:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:04:18,729 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) [2022-03-19 08:04:18,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 08:04:18,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:04:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:04:18,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-19 08:04:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:04:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:04:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:04:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-03-19 08:04:38,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:04:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284622977] [2022-03-19 08:04:38,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:04:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840784958] [2022-03-19 08:04:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840784958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:04:38,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:04:38,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5] total 40 [2022-03-19 08:04:38,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:04:38,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330432081] [2022-03-19 08:04:38,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330432081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:04:38,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:04:38,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 08:04:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111380496] [2022-03-19 08:04:38,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:04:38,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 08:04:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 08:04:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 08:04:38,248 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:04:38,791 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-19 08:04:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 08:04:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 08:04:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:04:38,792 INFO L225 Difference]: With dead ends: 50 [2022-03-19 08:04:38,792 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 08:04:38,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 34 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 08:04:38,792 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:04:38,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 298 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:04:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 08:04:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 08:04:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-19 08:04:38,801 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-03-19 08:04:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:04:38,801 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-19 08:04:38,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:04:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-19 08:04:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 08:04:38,801 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:04:38,801 INFO L500 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:04:38,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 08:04:39,002 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,SelfDestructingSolverStorable34 [2022-03-19 08:04:39,002 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:04:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:04:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1616573739, now seen corresponding path program 69 times [2022-03-19 08:04:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:39,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581828992] [2022-03-19 08:04:39,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:04:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1616573739, now seen corresponding path program 70 times [2022-03-19 08:04:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:04:39,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994489361] [2022-03-19 08:04:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:04:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:04:39,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:04:39,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586506156] [2022-03-19 08:04:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:04:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:04:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:04:39,012 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) [2022-03-19 08:04:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 08:04:39,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:04:39,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:04:39,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-19 08:04:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:04:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:04:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:05:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-03-19 08:05:03,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:05:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994489361] [2022-03-19 08:05:03,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:05:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586506156] [2022-03-19 08:05:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586506156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:05:03,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:05:03,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 5] total 41 [2022-03-19 08:05:03,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:05:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581828992] [2022-03-19 08:05:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581828992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:05:03,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:05:03,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 08:05:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995757582] [2022-03-19 08:05:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:05:03,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 08:05:03,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:05:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 08:05:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 08:05:03,179 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:05:03,839 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-03-19 08:05:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 08:05:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-19 08:05:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:05:03,840 INFO L225 Difference]: With dead ends: 51 [2022-03-19 08:05:03,840 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 08:05:03,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 35 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 08:05:03,841 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 08:05:03,841 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 306 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 08:05:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 08:05:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 08:05:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-03-19 08:05:03,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-03-19 08:05:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:05:03,851 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-03-19 08:05:03,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-03-19 08:05:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 08:05:03,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:05:03,851 INFO L500 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:05:03,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 08:05:04,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:05:04,052 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:05:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:05:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1425884111, now seen corresponding path program 71 times [2022-03-19 08:05:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:05:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [905190054] [2022-03-19 08:05:04,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:05:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1425884111, now seen corresponding path program 72 times [2022-03-19 08:05:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:05:04,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929638245] [2022-03-19 08:05:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:05:04,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:05:04,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:05:04,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816032561] [2022-03-19 08:05:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:05:04,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:05:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:05:04,062 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) [2022-03-19 08:05:04,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 08:05:04,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-19 08:05:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:05:04,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 152 conjunts are in the unsatisfiable core [2022-03-19 08:05:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:05:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:05:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:05:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-03-19 08:05:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:05:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929638245] [2022-03-19 08:05:35,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:05:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816032561] [2022-03-19 08:05:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816032561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:05:35,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:05:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 5] total 42 [2022-03-19 08:05:35,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:05:35,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [905190054] [2022-03-19 08:05:35,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [905190054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:05:35,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:05:35,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 08:05:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035151702] [2022-03-19 08:05:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:05:35,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 08:05:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:05:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 08:05:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 08:05:35,238 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:05:35,917 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-19 08:05:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 08:05:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 08:05:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:05:35,918 INFO L225 Difference]: With dead ends: 52 [2022-03-19 08:05:35,918 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 08:05:35,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 36 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 08:05:35,919 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 08:05:35,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 314 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 08:05:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 08:05:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 08:05:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-19 08:05:35,927 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-03-19 08:05:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:05:35,928 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-19 08:05:35,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:05:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-19 08:05:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 08:05:35,928 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:05:35,928 INFO L500 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:05:35,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 08:05:36,129 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,SelfDestructingSolverStorable36 [2022-03-19 08:05:36,129 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:05:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:05:36,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1252796949, now seen corresponding path program 73 times [2022-03-19 08:05:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:05:36,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727565168] [2022-03-19 08:05:36,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:05:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1252796949, now seen corresponding path program 74 times [2022-03-19 08:05:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:05:36,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297665133] [2022-03-19 08:05:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:05:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:05:36,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:05:36,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464905789] [2022-03-19 08:05:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:05:36,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:05:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:05:36,138 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) [2022-03-19 08:05:36,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 08:05:36,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:05:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:05:36,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-19 08:05:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:05:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:05:37,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:06:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-03-19 08:06:13,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:06:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297665133] [2022-03-19 08:06:13,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:06:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464905789] [2022-03-19 08:06:13,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464905789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:06:13,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:06:13,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 5] total 43 [2022-03-19 08:06:13,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:06:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727565168] [2022-03-19 08:06:13,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727565168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:06:13,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:06:13,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 08:06:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346461165] [2022-03-19 08:06:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:06:13,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 08:06:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:06:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 08:06:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 08:06:13,092 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:06:13,794 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-03-19 08:06:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 08:06:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-19 08:06:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:06:13,795 INFO L225 Difference]: With dead ends: 53 [2022-03-19 08:06:13,795 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 08:06:13,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 37 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 08:06:13,796 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 08:06:13,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 322 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 08:06:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 08:06:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-19 08:06:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-03-19 08:06:13,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-03-19 08:06:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:06:13,805 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-03-19 08:06:13,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-03-19 08:06:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 08:06:13,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:06:13,805 INFO L500 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:06:13,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-19 08:06:14,021 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,SelfDestructingSolverStorable37 [2022-03-19 08:06:14,021 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:06:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:06:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -182062223, now seen corresponding path program 75 times [2022-03-19 08:06:14,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:06:14,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552038907] [2022-03-19 08:06:14,022 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:06:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -182062223, now seen corresponding path program 76 times [2022-03-19 08:06:14,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:06:14,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680464269] [2022-03-19 08:06:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:06:14,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:06:14,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:06:14,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119247017] [2022-03-19 08:06:14,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:06:14,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:06:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:06:14,031 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) [2022-03-19 08:06:14,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 08:06:14,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:06:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:06:14,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-19 08:06:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:06:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:06:15,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:06:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-03-19 08:06:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:06:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680464269] [2022-03-19 08:06:57,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:06:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119247017] [2022-03-19 08:06:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119247017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:06:57,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:06:57,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 5] total 44 [2022-03-19 08:06:57,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:06:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552038907] [2022-03-19 08:06:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552038907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:06:57,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:06:57,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 08:06:57,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100584733] [2022-03-19 08:06:57,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:06:57,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 08:06:57,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:06:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 08:06:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 08:06:57,854 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:06:58,604 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-19 08:06:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 08:06:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 08:06:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:06:58,605 INFO L225 Difference]: With dead ends: 54 [2022-03-19 08:06:58,605 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 08:06:58,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 38 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 08:06:58,606 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 08:06:58,606 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 330 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 08:06:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 08:06:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 08:06:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-19 08:06:58,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-03-19 08:06:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:06:58,620 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-19 08:06:58,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:06:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-19 08:06:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 08:06:58,621 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:06:58,621 INFO L500 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:06:58,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 08:06:58,831 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,SelfDestructingSolverStorable38 [2022-03-19 08:06:58,831 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:06:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:06:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1349024085, now seen corresponding path program 77 times [2022-03-19 08:06:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:06:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797856170] [2022-03-19 08:06:58,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:06:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1349024085, now seen corresponding path program 78 times [2022-03-19 08:06:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:06:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465965917] [2022-03-19 08:06:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:06:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:06:58,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:06:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180695490] [2022-03-19 08:06:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:06:58,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:06:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:06:58,841 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) [2022-03-19 08:06:58,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 08:06:58,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-19 08:06:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:06:58,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 165 conjunts are in the unsatisfiable core [2022-03-19 08:06:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:07:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:07:00,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:07:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:07:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:07:04,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465965917] [2022-03-19 08:07:04,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:07:04,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180695490] [2022-03-19 08:07:04,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180695490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:07:04,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:07:04,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 84 [2022-03-19 08:07:04,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:07:04,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797856170] [2022-03-19 08:07:04,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797856170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:07:04,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:07:04,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 08:07:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235345001] [2022-03-19 08:07:04,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:07:04,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 08:07:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:07:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 08:07:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1729, Invalid=5243, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 08:07:04,190 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:07:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:07:05,128 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-03-19 08:07:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 08:07:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 08:07:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:07:05,129 INFO L225 Difference]: With dead ends: 55 [2022-03-19 08:07:05,129 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 08:07:05,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1735, Invalid=5405, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 08:07:05,130 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 08:07:05,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 257 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 08:07:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 08:07:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 08:07:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:07:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-03-19 08:07:05,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-03-19 08:07:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:07:05,143 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-03-19 08:07:05,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:07:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-03-19 08:07:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 08:07:05,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:07:05,144 INFO L500 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:07:05,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 08:07:05,362 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,SelfDestructingSolverStorable39 [2022-03-19 08:07:05,362 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:07:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:07:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1129863857, now seen corresponding path program 79 times [2022-03-19 08:07:05,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:07:05,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1168315543] [2022-03-19 08:07:05,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:07:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1129863857, now seen corresponding path program 80 times [2022-03-19 08:07:05,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:07:05,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469909842] [2022-03-19 08:07:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:07:05,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:07:05,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:07:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031804304] [2022-03-19 08:07:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:07:05,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:07:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:07:05,377 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) [2022-03-19 08:07:05,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 08:07:05,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:07:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:07:05,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 168 conjunts are in the unsatisfiable core [2022-03-19 08:07:05,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:07:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:07:06,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:08:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-03-19 08:08:00,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:08:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469909842] [2022-03-19 08:08:00,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:08:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031804304] [2022-03-19 08:08:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031804304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:08:00,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:08:00,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 5] total 46 [2022-03-19 08:08:00,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:08:00,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1168315543] [2022-03-19 08:08:00,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1168315543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:08:00,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:08:00,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 08:08:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092750783] [2022-03-19 08:08:00,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:08:00,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 08:08:00,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:08:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 08:08:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 08:08:00,295 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:08:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:08:01,330 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-19 08:08:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 08:08:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 08:08:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:08:01,331 INFO L225 Difference]: With dead ends: 56 [2022-03-19 08:08:01,331 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 08:08:01,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 40 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 08:08:01,332 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:08:01,332 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 346 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 08:08:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 08:08:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-19 08:08:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:08:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-19 08:08:01,346 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-03-19 08:08:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:08:01,347 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-19 08:08:01,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:08:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-19 08:08:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 08:08:01,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:08:01,347 INFO L500 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:08:01,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-19 08:08:01,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:08:01,559 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:08:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:08:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash 665978731, now seen corresponding path program 81 times [2022-03-19 08:08:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:08:01,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114190324] [2022-03-19 08:08:01,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:08:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash 665978731, now seen corresponding path program 82 times [2022-03-19 08:08:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:08:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784213663] [2022-03-19 08:08:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:08:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:08:01,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:08:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025325718] [2022-03-19 08:08:01,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:08:01,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:08:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:08:01,569 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) [2022-03-19 08:08:01,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 08:08:01,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:08:01,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:08:01,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 172 conjunts are in the unsatisfiable core [2022-03-19 08:08:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:08:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:08:02,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:09:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-19 08:09:05,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:09:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784213663] [2022-03-19 08:09:05,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:09:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025325718] [2022-03-19 08:09:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025325718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:09:05,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:09:05,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5] total 47 [2022-03-19 08:09:05,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:09:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114190324] [2022-03-19 08:09:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114190324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:09:05,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:09:05,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 08:09:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367809751] [2022-03-19 08:09:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:09:05,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 08:09:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:09:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 08:09:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 08:09:05,375 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:09:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:09:06,339 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-03-19 08:09:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 08:09:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-19 08:09:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:09:06,340 INFO L225 Difference]: With dead ends: 57 [2022-03-19 08:09:06,340 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 08:09:06,340 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 41 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 08:09:06,340 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 08:09:06,341 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 354 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 08:09:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 08:09:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 08:09:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:09:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-19 08:09:06,349 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-03-19 08:09:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:09:06,350 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-19 08:09:06,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:09:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-19 08:09:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 08:09:06,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:09:06,350 INFO L500 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:09:06,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-19 08:09:06,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:09:06,554 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:09:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:09:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash -829558287, now seen corresponding path program 83 times [2022-03-19 08:09:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:09:06,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155295964] [2022-03-19 08:09:06,555 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:09:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash -829558287, now seen corresponding path program 84 times [2022-03-19 08:09:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:09:06,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169725310] [2022-03-19 08:09:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:09:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:09:06,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:09:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058583386] [2022-03-19 08:09:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:09:06,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:09:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:09:06,563 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) [2022-03-19 08:09:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 08:09:06,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-19 08:09:06,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:09:06,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 176 conjunts are in the unsatisfiable core [2022-03-19 08:09:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:09:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:09:07,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-03-19 08:10:22,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169725310] [2022-03-19 08:10:22,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:10:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058583386] [2022-03-19 08:10:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058583386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:10:22,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:10:22,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 5] total 48 [2022-03-19 08:10:22,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155295964] [2022-03-19 08:10:22,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155295964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:22,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:22,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 08:10:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576916048] [2022-03-19 08:10:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:22,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 08:10:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 08:10:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 08:10:22,494 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:10:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:23,495 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-19 08:10:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 08:10:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 08:10:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:23,496 INFO L225 Difference]: With dead ends: 58 [2022-03-19 08:10:23,496 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 08:10:23,496 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 42 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 75.1s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 08:10:23,497 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:23,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 362 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 08:10:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 08:10:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 08:10:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:10:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-19 08:10:23,509 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-03-19 08:10:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:23,510 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-19 08:10:23,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:10:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-19 08:10:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 08:10:23,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:23,510 INFO L500 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:23,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 08:10:23,723 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,SelfDestructingSolverStorable42 [2022-03-19 08:10:23,723 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:23,724 INFO L85 PathProgramCache]: Analyzing trace with hash 53434411, now seen corresponding path program 85 times [2022-03-19 08:10:23,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:23,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345733361] [2022-03-19 08:10:23,726 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:10:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash 53434411, now seen corresponding path program 86 times [2022-03-19 08:10:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:23,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146034865] [2022-03-19 08:10:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:23,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:10:23,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968497459] [2022-03-19 08:10:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:10:23,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:23,737 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) [2022-03-19 08:10:23,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 08:10:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:10:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:23,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 180 conjunts are in the unsatisfiable core [2022-03-19 08:10:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:10:25,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:11:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-03-19 08:11:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:11:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146034865] [2022-03-19 08:11:52,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:11:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968497459] [2022-03-19 08:11:52,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968497459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:11:52,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:11:52,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 5] total 49 [2022-03-19 08:11:52,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:11:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345733361] [2022-03-19 08:11:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345733361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:11:52,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:11:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 08:11:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25863398] [2022-03-19 08:11:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:11:52,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 08:11:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:11:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 08:11:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2213, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 08:11:52,056 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:11:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:11:53,179 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-03-19 08:11:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 08:11:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-19 08:11:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:11:53,180 INFO L225 Difference]: With dead ends: 59 [2022-03-19 08:11:53,181 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 08:11:53,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 43 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 87.5s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 08:11:53,181 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:11:53,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 370 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 08:11:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 08:11:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 08:11:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:11:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-19 08:11:53,190 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-03-19 08:11:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:11:53,190 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-19 08:11:53,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:11:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-19 08:11:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 08:11:53,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:11:53,191 INFO L500 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:11:53,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 08:11:53,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:11:53,391 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:11:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:11:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1656404273, now seen corresponding path program 87 times [2022-03-19 08:11:53,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:11:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357209017] [2022-03-19 08:11:53,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:11:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1656404273, now seen corresponding path program 88 times [2022-03-19 08:11:53,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:11:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475620176] [2022-03-19 08:11:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:11:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:11:53,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:11:53,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970236450] [2022-03-19 08:11:53,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:11:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:11:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:11:53,400 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) [2022-03-19 08:11:53,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 08:11:53,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:11:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:11:53,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 184 conjunts are in the unsatisfiable core [2022-03-19 08:11:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:11:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:11:54,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:13:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-03-19 08:13:38,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:13:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475620176] [2022-03-19 08:13:38,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:13:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970236450] [2022-03-19 08:13:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970236450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:13:38,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:13:38,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 5] total 50 [2022-03-19 08:13:38,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:13:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357209017] [2022-03-19 08:13:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357209017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:13:38,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:13:38,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 08:13:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020649540] [2022-03-19 08:13:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:13:38,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 08:13:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:13:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 08:13:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 08:13:38,394 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:13:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:13:39,501 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-19 08:13:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 08:13:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-19 08:13:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:13:39,502 INFO L225 Difference]: With dead ends: 60 [2022-03-19 08:13:39,502 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 08:13:39,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 44 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 104.1s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 08:13:39,503 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:13:39,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 378 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 08:13:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 08:13:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 08:13:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:13:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-19 08:13:39,516 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-03-19 08:13:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:13:39,517 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-19 08:13:39,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:13:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-19 08:13:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 08:13:39,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:13:39,517 INFO L500 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:13:39,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 08:13:39,731 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,SelfDestructingSolverStorable44 [2022-03-19 08:13:39,731 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:13:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:13:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash -191137557, now seen corresponding path program 89 times [2022-03-19 08:13:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:13:39,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644172125] [2022-03-19 08:13:39,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:13:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash -191137557, now seen corresponding path program 90 times [2022-03-19 08:13:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:13:39,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146808249] [2022-03-19 08:13:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:13:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:13:39,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:13:39,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2597762] [2022-03-19 08:13:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:13:39,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:13:39,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:13:39,742 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) [2022-03-19 08:13:39,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 08:13:39,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-19 08:13:39,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:13:39,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 188 conjunts are in the unsatisfiable core [2022-03-19 08:13:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:13:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:13:41,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:15:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-19 08:15:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:15:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146808249] [2022-03-19 08:15:49,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 08:15:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2597762] [2022-03-19 08:15:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2597762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:15:49,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:15:49,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5] total 51 [2022-03-19 08:15:49,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:15:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644172125] [2022-03-19 08:15:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644172125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:15:49,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:15:49,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 08:15:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481246354] [2022-03-19 08:15:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:15:49,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 08:15:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:15:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 08:15:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 08:15:49,317 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:15:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:15:50,540 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-03-19 08:15:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 08:15:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-19 08:15:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:15:50,541 INFO L225 Difference]: With dead ends: 61 [2022-03-19 08:15:50,541 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 08:15:50,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 17 SyntacticMatches, 45 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 128.7s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 08:15:50,542 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:15:50,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 386 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 08:15:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 08:15:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-19 08:15:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:15:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-03-19 08:15:50,553 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-03-19 08:15:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:15:50,553 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-03-19 08:15:50,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:15:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-03-19 08:15:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 08:15:50,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:15:50,553 INFO L500 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:15:50,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-19 08:15:50,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:15:50,754 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:15:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:15:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1630359439, now seen corresponding path program 91 times [2022-03-19 08:15:50,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:15:50,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192670690] [2022-03-19 08:15:50,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:15:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1630359439, now seen corresponding path program 92 times [2022-03-19 08:15:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:15:50,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585127474] [2022-03-19 08:15:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:15:50,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:15:50,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 08:15:50,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502791857] [2022-03-19 08:15:50,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:15:50,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:15:50,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:15:50,764 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:15:50,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 08:15:50,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:15:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:15:50,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 192 conjunts are in the unsatisfiable core [2022-03-19 08:15:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:15:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:15:52,139 INFO L328 TraceCheckSpWp]: Computing backward predicates...