/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:30:39,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:30:39,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:30:39,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 06:30:39,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:30:39,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:30:39,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:30:39,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:30:39,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:30:39,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:30:39,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:30:39,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:30:39,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:30:39,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:30:39,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:30:39,205 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:30:39,205 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:30:39,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:30:39,205 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:30:39,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:30:39,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:30:39,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:30:39,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:30:39,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:30:39,440 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:30:39,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-03-19 06:30:39,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5d62faa/1c889de2da2b40718b2479c4afaf7bf3/FLAGbe1dae8bf [2022-03-19 06:30:39,807 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:30:39,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-03-19 06:30:39,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5d62faa/1c889de2da2b40718b2479c4afaf7bf3/FLAGbe1dae8bf [2022-03-19 06:30:40,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5d62faa/1c889de2da2b40718b2479c4afaf7bf3 [2022-03-19 06:30:40,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:30:40,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:30:40,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:30:40,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:30:40,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:30:40,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628a36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40, skipping insertion in model container [2022-03-19 06:30:40,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:30:40,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:30:40,362 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c[458,471] [2022-03-19 06:30:40,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:30:40,403 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:30:40,412 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c[458,471] [2022-03-19 06:30:40,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:30:40,444 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:30:40,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40 WrapperNode [2022-03-19 06:30:40,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:30:40,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:30:40,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:30:40,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:30:40,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:30:40,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:30:40,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:30:40,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:30:40,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (1/1) ... [2022-03-19 06:30:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:30:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:40,507 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 06:30:40,525 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 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 06:30:40,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:30:40,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:30:40,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:30:40,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:30:40,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:30:40,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 06:30:40,546 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:30:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:30:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:30:40,599 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:30:40,601 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:30:40,731 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:30:40,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:30:40,762 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:30:40,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:30:40 BoogieIcfgContainer [2022-03-19 06:30:40,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:30:40,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:30:40,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:30:40,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:30:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:30:40" (1/3) ... [2022-03-19 06:30:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3c7b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:30:40, skipping insertion in model container [2022-03-19 06:30:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:40" (2/3) ... [2022-03-19 06:30:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3c7b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:30:40, skipping insertion in model container [2022-03-19 06:30:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:30:40" (3/3) ... [2022-03-19 06:30:40,770 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2022-03-19 06:30:40,773 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:30:40,774 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:30:40,818 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:30:40,829 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 06:30:40,829 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:30:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 06:30:40,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:40,861 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:40,862 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2022-03-19 06:30:40,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:40,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [680450044] [2022-03-19 06:30:40,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 2 times [2022-03-19 06:30:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690300342] [2022-03-19 06:30:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:30:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:41,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:30:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:41,066 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 06:30:41,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690300342] [2022-03-19 06:30:41,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690300342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:30:41,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:41,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [680450044] [2022-03-19 06:30:41,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [680450044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:30:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886211619] [2022-03-19 06:30:41,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:41,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 06:30:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 06:30:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:30:41,097 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:41,175 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-19 06:30:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 06:30:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 06:30:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:41,182 INFO L225 Difference]: With dead ends: 50 [2022-03-19 06:30:41,182 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 06:30:41,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:30:41,186 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:41,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 06:30:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-19 06:30:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:30:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-19 06:30:41,213 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-19 06:30:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:41,213 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-19 06:30:41,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-19 06:30:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:30:41,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:41,215 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:41,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:30:41,216 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2022-03-19 06:30:41,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906555928] [2022-03-19 06:30:41,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 2 times [2022-03-19 06:30:41,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608268215] [2022-03-19 06:30:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:41,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:41,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075530099] [2022-03-19 06:30:41,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:41,243 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 06:30:41,259 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 06:30:41,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:30:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 06:30:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:41,427 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 06:30:41,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:30:41,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:41,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608268215] [2022-03-19 06:30:41,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:41,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075530099] [2022-03-19 06:30:41,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075530099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:30:41,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906555928] [2022-03-19 06:30:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906555928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:30:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671016316] [2022-03-19 06:30:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:41,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 06:30:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 06:30:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:30:41,431 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:30:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:41,448 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 06:30:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 06:30:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-19 06:30:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:41,450 INFO L225 Difference]: With dead ends: 34 [2022-03-19 06:30:41,450 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 06:30:41,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:30:41,452 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:41,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 06:30:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 06:30:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:30:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-19 06:30:41,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-19 06:30:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:41,469 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-19 06:30:41,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:30:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-19 06:30:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:30:41,470 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:41,471 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:41,493 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 06:30:41,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:41,691 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2022-03-19 06:30:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771807733] [2022-03-19 06:30:41,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 2 times [2022-03-19 06:30:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:41,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17979334] [2022-03-19 06:30:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:41,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:41,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697672990] [2022-03-19 06:30:41,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:41,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:41,713 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 06:30:41,714 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 06:30:41,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:30:41,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:30:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:41,873 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 06:30:41,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:30:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17979334] [2022-03-19 06:30:41,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697672990] [2022-03-19 06:30:41,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697672990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:41,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771807733] [2022-03-19 06:30:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771807733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207891609] [2022-03-19 06:30:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:41,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:30:41,877 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:42,040 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-19 06:30:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:30:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 06:30:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:42,042 INFO L225 Difference]: With dead ends: 36 [2022-03-19 06:30:42,042 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 06:30:42,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:30:42,043 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:42,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 06:30:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 06:30:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-19 06:30:42,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-19 06:30:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:42,050 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-19 06:30:42,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-19 06:30:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 06:30:42,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:42,051 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:42,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 06:30:42,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 06:30:42,267 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2022-03-19 06:30:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:42,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [942996579] [2022-03-19 06:30:42,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:42,289 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:42,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 2 times [2022-03-19 06:30:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:42,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551508861] [2022-03-19 06:30:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:42,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:42,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652467211] [2022-03-19 06:30:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:42,308 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 06:30:42,309 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 06:30:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:30:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:42,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:42,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:42,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551508861] [2022-03-19 06:30:42,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:42,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652467211] [2022-03-19 06:30:42,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652467211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:42,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:42,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 06:30:42,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [942996579] [2022-03-19 06:30:42,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [942996579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:42,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:42,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931250760] [2022-03-19 06:30:42,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:42,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:30:42,662 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:30:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:42,811 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-19 06:30:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:30:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-03-19 06:30:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:42,813 INFO L225 Difference]: With dead ends: 42 [2022-03-19 06:30:42,813 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 06:30:42,813 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:30:42,814 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:42,814 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 06:30:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 06:30:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-19 06:30:42,819 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2022-03-19 06:30:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:42,819 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-19 06:30:42,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:30:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-19 06:30:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 06:30:42,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:42,820 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:42,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 06:30:43,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:43,026 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2022-03-19 06:30:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139859761] [2022-03-19 06:30:43,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:43,030 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:43,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 2 times [2022-03-19 06:30:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820837578] [2022-03-19 06:30:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:43,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:43,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571319675] [2022-03-19 06:30:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:43,040 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 06:30:43,041 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 06:30:43,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:30:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:43,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 06:30:43,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820837578] [2022-03-19 06:30:43,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571319675] [2022-03-19 06:30:43,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571319675] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:43,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:43,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 06:30:43,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139859761] [2022-03-19 06:30:43,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139859761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:43,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:43,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753746035] [2022-03-19 06:30:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:43,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:30:43,324 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:30:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:43,354 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-19 06:30:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:30:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-19 06:30:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:43,355 INFO L225 Difference]: With dead ends: 40 [2022-03-19 06:30:43,355 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 06:30:43,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:30:43,356 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:43,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 06:30:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 06:30:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-03-19 06:30:43,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2022-03-19 06:30:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:43,363 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-03-19 06:30:43,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:30:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-03-19 06:30:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 06:30:43,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:43,368 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:43,387 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 06:30:43,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:43,583 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2022-03-19 06:30:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443414387] [2022-03-19 06:30:43,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:43,587 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:43,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 2 times [2022-03-19 06:30:43,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:43,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542127987] [2022-03-19 06:30:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:43,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:43,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827750484] [2022-03-19 06:30:43,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:43,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:43,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:43,612 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 06:30:43,613 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 06:30:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 06:30:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:30:43,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542127987] [2022-03-19 06:30:43,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827750484] [2022-03-19 06:30:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827750484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:43,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:43,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 06:30:43,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443414387] [2022-03-19 06:30:43,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443414387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:43,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:43,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:30:43,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691590916] [2022-03-19 06:30:43,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:43,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:30:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:30:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:30:43,998 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:30:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:44,056 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-19 06:30:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:30:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-19 06:30:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:44,058 INFO L225 Difference]: With dead ends: 44 [2022-03-19 06:30:44,058 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 06:30:44,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:44,058 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:44,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 06:30:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 06:30:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-19 06:30:44,066 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 37 [2022-03-19 06:30:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:44,066 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-19 06:30:44,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:30:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-19 06:30:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 06:30:44,067 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:44,067 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:44,089 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 06:30:44,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:44,278 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 1 times [2022-03-19 06:30:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606194885] [2022-03-19 06:30:44,283 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:44,283 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:44,283 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 2 times [2022-03-19 06:30:44,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801903857] [2022-03-19 06:30:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:44,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:44,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:44,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501385528] [2022-03-19 06:30:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:44,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:44,297 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 06:30:44,298 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 06:30:44,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 06:30:44,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:30:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801903857] [2022-03-19 06:30:44,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501385528] [2022-03-19 06:30:44,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501385528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:44,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:44,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 06:30:44,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606194885] [2022-03-19 06:30:44,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606194885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:44,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:44,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:30:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205561478] [2022-03-19 06:30:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:44,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:30:44,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:30:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:30:44,502 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:44,542 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-03-19 06:30:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:30:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2022-03-19 06:30:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:44,544 INFO L225 Difference]: With dead ends: 54 [2022-03-19 06:30:44,544 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 06:30:44,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:44,545 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:44,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 93 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 06:30:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 06:30:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 06:30:44,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2022-03-19 06:30:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:44,564 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 06:30:44,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 06:30:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 06:30:44,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:44,568 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:44,589 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 06:30:44,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:44,784 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 3 times [2022-03-19 06:30:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:44,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303167161] [2022-03-19 06:30:44,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:44,787 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:44,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 4 times [2022-03-19 06:30:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419250996] [2022-03-19 06:30:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:44,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:44,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620211976] [2022-03-19 06:30:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:44,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:44,796 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 06:30:44,797 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 06:30:44,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 06:30:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:30:44,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419250996] [2022-03-19 06:30:45,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620211976] [2022-03-19 06:30:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620211976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:45,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:45,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 06:30:45,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303167161] [2022-03-19 06:30:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303167161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:45,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:45,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:30:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237126951] [2022-03-19 06:30:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:45,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:30:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:30:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:30:45,130 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:30:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:45,196 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-19 06:30:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:30:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-03-19 06:30:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:45,199 INFO L225 Difference]: With dead ends: 52 [2022-03-19 06:30:45,199 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 06:30:45,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:30:45,200 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:45,200 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 06:30:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 06:30:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-19 06:30:45,210 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2022-03-19 06:30:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:45,210 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-19 06:30:45,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:30:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-19 06:30:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 06:30:45,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:45,211 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:45,231 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 06:30:45,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:45,421 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1448798205, now seen corresponding path program 3 times [2022-03-19 06:30:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:45,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1397914100] [2022-03-19 06:30:45,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:45,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:45,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1448798205, now seen corresponding path program 4 times [2022-03-19 06:30:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:45,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635064333] [2022-03-19 06:30:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:45,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257739574] [2022-03-19 06:30:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:45,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:45,433 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 06:30:45,434 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 06:30:45,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:30:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:45,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:30:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635064333] [2022-03-19 06:30:45,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257739574] [2022-03-19 06:30:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257739574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:45,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 06:30:45,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:45,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1397914100] [2022-03-19 06:30:45,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1397914100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:45,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:45,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:30:45,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251686051] [2022-03-19 06:30:45,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:45,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:30:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:30:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:45,660 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:45,707 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-03-19 06:30:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:30:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2022-03-19 06:30:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:45,710 INFO L225 Difference]: With dead ends: 62 [2022-03-19 06:30:45,711 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 06:30:45,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:30:45,712 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:45,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 06:30:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 06:30:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-19 06:30:45,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2022-03-19 06:30:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:45,723 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-19 06:30:45,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-19 06:30:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 06:30:45,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:45,724 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:45,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:45,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 06:30:45,936 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 468857897, now seen corresponding path program 5 times [2022-03-19 06:30:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:45,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663942785] [2022-03-19 06:30:45,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:45,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:45,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 468857897, now seen corresponding path program 6 times [2022-03-19 06:30:45,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612124489] [2022-03-19 06:30:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:45,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:45,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384009180] [2022-03-19 06:30:45,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:45,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:45,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:45,948 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 06:30:45,949 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 06:30:52,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:30:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:52,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 06:30:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 06:30:52,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:52,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612124489] [2022-03-19 06:30:52,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:52,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384009180] [2022-03-19 06:30:52,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384009180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:52,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:52,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 06:30:52,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:52,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663942785] [2022-03-19 06:30:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663942785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:52,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:52,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:30:52,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754655984] [2022-03-19 06:30:52,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:52,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:30:52,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:30:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:52,887 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:30:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:52,971 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-19 06:30:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:30:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-03-19 06:30:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:52,972 INFO L225 Difference]: With dead ends: 60 [2022-03-19 06:30:52,972 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 06:30:52,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:52,972 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:52,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 06:30:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 06:30:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-19 06:30:52,980 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-03-19 06:30:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:52,980 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-19 06:30:52,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:30:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-19 06:30:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:30:52,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:52,981 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:52,989 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 06:30:53,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 06:30:53,182 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 5 times [2022-03-19 06:30:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:53,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [568846256] [2022-03-19 06:30:53,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:53,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:53,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 6 times [2022-03-19 06:30:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968377680] [2022-03-19 06:30:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:53,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:53,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067458494] [2022-03-19 06:30:53,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:53,199 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 06:30:53,206 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 06:30:53,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 06:30:53,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 06:30:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:53,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 06:30:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968377680] [2022-03-19 06:30:53,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067458494] [2022-03-19 06:30:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067458494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:53,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:53,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 06:30:53,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [568846256] [2022-03-19 06:30:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [568846256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:53,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:30:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880681320] [2022-03-19 06:30:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:53,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:30:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:30:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:53,833 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:53,885 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-03-19 06:30:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:30:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-03-19 06:30:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:53,886 INFO L225 Difference]: With dead ends: 70 [2022-03-19 06:30:53,886 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 06:30:53,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:53,887 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:53,887 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 06:30:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 06:30:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-19 06:30:53,895 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2022-03-19 06:30:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:53,895 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-19 06:30:53,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-19 06:30:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:30:53,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:53,897 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:53,904 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 06:30:54,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 06:30:54,103 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1425669898, now seen corresponding path program 7 times [2022-03-19 06:30:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:54,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [979276326] [2022-03-19 06:30:54,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:54,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:54,106 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1425669898, now seen corresponding path program 8 times [2022-03-19 06:30:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:54,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292312986] [2022-03-19 06:30:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:54,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:54,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601491361] [2022-03-19 06:30:54,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:54,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:54,136 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 06:30:54,137 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 06:30:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 06:30:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 06:30:54,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292312986] [2022-03-19 06:30:55,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601491361] [2022-03-19 06:30:55,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601491361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:55,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:55,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 06:30:55,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [979276326] [2022-03-19 06:30:55,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [979276326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:55,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:55,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:30:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046323202] [2022-03-19 06:30:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:55,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:30:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:30:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:55,300 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:30:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:55,405 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-19 06:30:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:30:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-03-19 06:30:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:55,406 INFO L225 Difference]: With dead ends: 68 [2022-03-19 06:30:55,406 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 06:30:55,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:55,407 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:55,407 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 326 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 06:30:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-19 06:30:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-19 06:30:55,414 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 61 [2022-03-19 06:30:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:55,414 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-19 06:30:55,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:30:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-19 06:30:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 06:30:55,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:55,415 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:55,431 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 06:30:55,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 06:30:55,616 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1579977147, now seen corresponding path program 7 times [2022-03-19 06:30:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209987527] [2022-03-19 06:30:55,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:55,619 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:55,619 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1579977147, now seen corresponding path program 8 times [2022-03-19 06:30:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660296655] [2022-03-19 06:30:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:55,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:55,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797386304] [2022-03-19 06:30:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:55,627 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 06:30:55,628 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 06:30:55,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:55,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 06:30:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:55,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 06:30:55,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:55,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660296655] [2022-03-19 06:30:55,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:55,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797386304] [2022-03-19 06:30:55,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797386304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:55,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:55,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 06:30:55,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:55,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209987527] [2022-03-19 06:30:55,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209987527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:55,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:55,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:30:55,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924848285] [2022-03-19 06:30:55,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:55,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:30:55,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:30:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:55,956 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:56,023 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-03-19 06:30:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:30:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 63 [2022-03-19 06:30:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:56,025 INFO L225 Difference]: With dead ends: 78 [2022-03-19 06:30:56,026 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 06:30:56,026 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:30:56,026 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:56,027 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 06:30:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-19 06:30:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-03-19 06:30:56,044 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2022-03-19 06:30:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:56,044 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-03-19 06:30:56,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-03-19 06:30:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:30:56,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:56,045 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:56,069 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 06:30:56,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 06:30:56,259 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 9 times [2022-03-19 06:30:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:56,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287325559] [2022-03-19 06:30:56,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:56,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:56,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 10 times [2022-03-19 06:30:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:56,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369466271] [2022-03-19 06:30:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:56,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:56,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792576851] [2022-03-19 06:30:56,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:56,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:56,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:56,270 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 06:30:56,272 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 06:30:56,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 06:30:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 06:30:56,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369466271] [2022-03-19 06:30:56,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792576851] [2022-03-19 06:30:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792576851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:56,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:56,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 06:30:56,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:56,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287325559] [2022-03-19 06:30:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287325559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:56,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:56,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:30:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052439193] [2022-03-19 06:30:56,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:56,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:30:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:30:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:56,634 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:30:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:56,760 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-19 06:30:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:30:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-03-19 06:30:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:56,761 INFO L225 Difference]: With dead ends: 76 [2022-03-19 06:30:56,761 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 06:30:56,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:56,762 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:56,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 06:30:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 06:30:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:30:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-19 06:30:56,769 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 69 [2022-03-19 06:30:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:56,769 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-19 06:30:56,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:30:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-19 06:30:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:30:56,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:56,770 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:56,787 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 06:30:56,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 06:30:56,983 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -802694170, now seen corresponding path program 9 times [2022-03-19 06:30:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [374821267] [2022-03-19 06:30:56,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:56,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:56,986 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash -802694170, now seen corresponding path program 10 times [2022-03-19 06:30:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:56,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931817016] [2022-03-19 06:30:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:56,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499858313] [2022-03-19 06:30:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:56,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:56,994 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 06:30:56,995 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 06:30:57,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:57,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 06:30:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:57,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 06:30:57,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931817016] [2022-03-19 06:30:57,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499858313] [2022-03-19 06:30:57,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499858313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:57,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 06:30:57,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [374821267] [2022-03-19 06:30:57,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [374821267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:57,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:30:57,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485256940] [2022-03-19 06:30:57,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:57,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:30:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:30:57,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:57,348 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:57,425 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-19 06:30:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:30:57,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-03-19 06:30:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:57,427 INFO L225 Difference]: With dead ends: 86 [2022-03-19 06:30:57,427 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 06:30:57,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:30:57,429 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:57,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 06:30:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-19 06:30:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:30:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-19 06:30:57,449 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2022-03-19 06:30:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:57,450 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-19 06:30:57,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-19 06:30:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 06:30:57,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:57,454 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:57,473 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 06:30:57,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:57,659 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash 540885452, now seen corresponding path program 11 times [2022-03-19 06:30:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678535843] [2022-03-19 06:30:57,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:57,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:57,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 540885452, now seen corresponding path program 12 times [2022-03-19 06:30:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:57,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067362209] [2022-03-19 06:30:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:57,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:57,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:57,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488477795] [2022-03-19 06:30:57,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:57,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:57,682 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 06:30:57,683 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 06:31:03,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 06:31:03,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 06:31:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 06:31:03,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:03,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067362209] [2022-03-19 06:31:03,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488477795] [2022-03-19 06:31:03,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488477795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:03,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 06:31:03,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678535843] [2022-03-19 06:31:03,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678535843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:03,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:31:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890925290] [2022-03-19 06:31:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:03,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:31:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:31:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:31:03,868 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 06:31:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:04,007 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-19 06:31:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:31:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-03-19 06:31:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:04,008 INFO L225 Difference]: With dead ends: 84 [2022-03-19 06:31:04,008 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 06:31:04,009 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:31:04,009 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:04,009 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 464 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 06:31:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-19 06:31:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-19 06:31:04,016 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 77 [2022-03-19 06:31:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:04,016 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-19 06:31:04,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 06:31:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-19 06:31:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 06:31:04,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:04,017 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:04,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:04,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 06:31:04,218 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1454305145, now seen corresponding path program 11 times [2022-03-19 06:31:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:04,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412258455] [2022-03-19 06:31:04,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:04,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:04,220 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1454305145, now seen corresponding path program 12 times [2022-03-19 06:31:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779327394] [2022-03-19 06:31:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:04,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916366695] [2022-03-19 06:31:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:31:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:04,228 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 06:31:04,229 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 06:31:04,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 06:31:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 06:31:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 06:31:04,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779327394] [2022-03-19 06:31:04,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916366695] [2022-03-19 06:31:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916366695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:04,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:04,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 06:31:04,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412258455] [2022-03-19 06:31:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412258455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:04,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:04,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:31:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613879904] [2022-03-19 06:31:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:04,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:31:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:31:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:31:04,734 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:31:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:04,833 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-03-19 06:31:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:31:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 79 [2022-03-19 06:31:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:04,834 INFO L225 Difference]: With dead ends: 94 [2022-03-19 06:31:04,835 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 06:31:04,836 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:31:04,836 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:04,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 105 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 06:31:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-19 06:31:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-03-19 06:31:04,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2022-03-19 06:31:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:04,846 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-03-19 06:31:04,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:31:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-03-19 06:31:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 06:31:04,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:04,847 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:04,852 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 06:31:05,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 06:31:05,052 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1082476115, now seen corresponding path program 13 times [2022-03-19 06:31:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1595932452] [2022-03-19 06:31:05,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:05,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:05,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1082476115, now seen corresponding path program 14 times [2022-03-19 06:31:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518967196] [2022-03-19 06:31:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:05,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:05,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28780236] [2022-03-19 06:31:05,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:31:05,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:05,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:05,062 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 06:31:05,063 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 06:31:06,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:31:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 06:31:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 06:31:06,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518967196] [2022-03-19 06:31:06,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28780236] [2022-03-19 06:31:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28780236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:06,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:06,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 06:31:06,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1595932452] [2022-03-19 06:31:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1595932452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:06,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:06,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:31:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106286404] [2022-03-19 06:31:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:06,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:31:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:31:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:31:06,604 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 06:31:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:06,758 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-19 06:31:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:31:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-03-19 06:31:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:06,760 INFO L225 Difference]: With dead ends: 92 [2022-03-19 06:31:06,760 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 06:31:06,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:31:06,760 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:06,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 542 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 06:31:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-19 06:31:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-19 06:31:06,768 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 85 [2022-03-19 06:31:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:06,768 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-19 06:31:06,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 06:31:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-19 06:31:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 06:31:06,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:06,769 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:06,774 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 06:31:06,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 06:31:06,971 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1863324712, now seen corresponding path program 13 times [2022-03-19 06:31:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:06,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498831146] [2022-03-19 06:31:06,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:06,974 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:06,974 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1863324712, now seen corresponding path program 14 times [2022-03-19 06:31:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786002691] [2022-03-19 06:31:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:06,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:06,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479491925] [2022-03-19 06:31:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:31:06,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:06,989 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 06:31:06,991 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 06:31:07,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:31:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 06:31:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 18 proven. 128 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 06:31:07,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786002691] [2022-03-19 06:31:07,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479491925] [2022-03-19 06:31:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479491925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:07,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:07,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 06:31:07,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498831146] [2022-03-19 06:31:07,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498831146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:07,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:07,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:31:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103625780] [2022-03-19 06:31:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:07,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:31:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:31:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:31:07,435 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:07,547 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-03-19 06:31:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:31:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) Word has length 87 [2022-03-19 06:31:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:07,549 INFO L225 Difference]: With dead ends: 102 [2022-03-19 06:31:07,549 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 06:31:07,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-19 06:31:07,549 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:07,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 06:31:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 06:31:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-03-19 06:31:07,558 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2022-03-19 06:31:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:07,558 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-03-19 06:31:07,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-03-19 06:31:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 06:31:07,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:07,559 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:07,576 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 06:31:07,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:07,759 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -243875698, now seen corresponding path program 15 times [2022-03-19 06:31:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:07,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219386686] [2022-03-19 06:31:07,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:07,762 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:07,762 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -243875698, now seen corresponding path program 16 times [2022-03-19 06:31:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173893774] [2022-03-19 06:31:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:07,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535719361] [2022-03-19 06:31:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:31:07,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:07,783 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 06:31:07,785 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 06:31:07,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:31:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 06:31:07,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 06:31:08,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:08,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173893774] [2022-03-19 06:31:08,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535719361] [2022-03-19 06:31:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535719361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:08,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:08,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 06:31:08,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219386686] [2022-03-19 06:31:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219386686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:08,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:08,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:31:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627562797] [2022-03-19 06:31:08,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:08,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:31:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:31:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:31:08,243 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 06:31:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:08,438 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-19 06:31:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:31:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-03-19 06:31:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:08,439 INFO L225 Difference]: With dead ends: 100 [2022-03-19 06:31:08,439 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 06:31:08,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:31:08,441 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:08,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 626 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:31:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 06:31:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-19 06:31:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 15 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:31:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-19 06:31:08,454 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2022-03-19 06:31:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:08,454 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-19 06:31:08,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 06:31:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-19 06:31:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 06:31:08,455 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:08,455 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:08,474 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 06:31:08,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:08,656 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash 304473801, now seen corresponding path program 15 times [2022-03-19 06:31:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1581342485] [2022-03-19 06:31:08,658 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:08,659 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:08,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash 304473801, now seen corresponding path program 16 times [2022-03-19 06:31:08,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:08,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680657199] [2022-03-19 06:31:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:08,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568488333] [2022-03-19 06:31:08,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:31:08,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:08,666 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 06:31:08,669 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 06:31:08,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:31:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 06:31:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:08,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 20 proven. 162 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 06:31:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:09,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680657199] [2022-03-19 06:31:09,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568488333] [2022-03-19 06:31:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568488333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:09,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:09,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 06:31:09,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1581342485] [2022-03-19 06:31:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1581342485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:09,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:09,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:31:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292156466] [2022-03-19 06:31:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:09,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:31:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:31:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:31:09,169 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:09,303 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-03-19 06:31:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 06:31:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) Word has length 95 [2022-03-19 06:31:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:09,304 INFO L225 Difference]: With dead ends: 110 [2022-03-19 06:31:09,304 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 06:31:09,304 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 06:31:09,305 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:09,305 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 06:31:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-19 06:31:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:31:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-03-19 06:31:09,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2022-03-19 06:31:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:09,314 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-03-19 06:31:09,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-03-19 06:31:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 06:31:09,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:09,315 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:09,352 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 06:31:09,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 06:31:09,535 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1379030639, now seen corresponding path program 17 times [2022-03-19 06:31:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430701562] [2022-03-19 06:31:09,538 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:09,538 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:09,538 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1379030639, now seen corresponding path program 18 times [2022-03-19 06:31:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954674961] [2022-03-19 06:31:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:09,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439975408] [2022-03-19 06:31:09,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:31:09,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:09,546 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 06:31:09,547 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 06:32:15,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 06:32:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 06:32:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 06:32:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:16,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954674961] [2022-03-19 06:32:16,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439975408] [2022-03-19 06:32:16,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439975408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:16,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:16,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 06:32:16,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430701562] [2022-03-19 06:32:16,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430701562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:16,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:16,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:32:16,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620511039] [2022-03-19 06:32:16,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:16,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:32:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:32:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:32:16,439 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 06:32:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:16,642 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-19 06:32:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:32:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 101 [2022-03-19 06:32:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:16,643 INFO L225 Difference]: With dead ends: 108 [2022-03-19 06:32:16,643 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 06:32:16,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:32:16,644 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:16,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 716 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 06:32:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-19 06:32:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-19 06:32:16,652 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 101 [2022-03-19 06:32:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:16,653 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-19 06:32:16,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 06:32:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-19 06:32:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 06:32:16,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:16,653 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:16,700 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 06:32:16,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 06:32:16,854 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash 844335210, now seen corresponding path program 17 times [2022-03-19 06:32:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640438962] [2022-03-19 06:32:16,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:16,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:16,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 844335210, now seen corresponding path program 18 times [2022-03-19 06:32:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:16,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386782351] [2022-03-19 06:32:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:16,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316017357] [2022-03-19 06:32:16,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:16,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:16,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:16,865 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 06:32:16,866 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 06:32:17,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 06:32:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 06:32:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:17,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 06:32:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386782351] [2022-03-19 06:32:17,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316017357] [2022-03-19 06:32:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316017357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:17,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:17,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 06:32:17,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:17,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640438962] [2022-03-19 06:32:17,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640438962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:17,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:17,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:32:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919067419] [2022-03-19 06:32:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:17,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:32:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:32:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:32:17,964 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:32:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:18,092 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-03-19 06:32:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 06:32:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) Word has length 103 [2022-03-19 06:32:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:18,093 INFO L225 Difference]: With dead ends: 118 [2022-03-19 06:32:18,093 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 06:32:18,093 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=656, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 06:32:18,094 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:18,094 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 150 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 06:32:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-19 06:32:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-03-19 06:32:18,103 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 103 [2022-03-19 06:32:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:18,103 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-03-19 06:32:18,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:32:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-03-19 06:32:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 06:32:18,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:18,104 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:18,110 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 06:32:18,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:18,308 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash -324109488, now seen corresponding path program 19 times [2022-03-19 06:32:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:18,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767748751] [2022-03-19 06:32:18,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:18,311 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:18,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash -324109488, now seen corresponding path program 20 times [2022-03-19 06:32:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313382235] [2022-03-19 06:32:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:18,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:18,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642551807] [2022-03-19 06:32:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:18,318 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 06:32:18,319 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 06:32:19,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 06:32:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 06:32:19,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313382235] [2022-03-19 06:32:19,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642551807] [2022-03-19 06:32:19,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642551807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:19,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:19,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 06:32:19,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767748751] [2022-03-19 06:32:19,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767748751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:19,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:19,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:32:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456936134] [2022-03-19 06:32:19,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:19,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:32:19,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:32:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:32:19,732 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 06:32:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:19,963 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-19 06:32:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:32:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 109 [2022-03-19 06:32:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:19,964 INFO L225 Difference]: With dead ends: 116 [2022-03-19 06:32:19,964 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 06:32:19,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:32:19,965 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:19,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 812 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 06:32:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 06:32:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 17 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-19 06:32:19,975 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 109 [2022-03-19 06:32:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:19,975 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-19 06:32:19,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 06:32:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-19 06:32:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 06:32:19,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:19,976 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:19,983 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 06:32:20,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:20,182 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 509212939, now seen corresponding path program 19 times [2022-03-19 06:32:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:20,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393669804] [2022-03-19 06:32:20,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:20,184 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:20,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 509212939, now seen corresponding path program 20 times [2022-03-19 06:32:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473193920] [2022-03-19 06:32:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:20,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:20,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:20,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82309328] [2022-03-19 06:32:20,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:20,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:20,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:20,192 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 06:32:20,193 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 06:32:20,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:20,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 06:32:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:20,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 06:32:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473193920] [2022-03-19 06:32:20,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82309328] [2022-03-19 06:32:20,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82309328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:20,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:20,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 06:32:20,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393669804] [2022-03-19 06:32:20,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393669804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:20,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:20,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:32:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780840406] [2022-03-19 06:32:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:20,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:32:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:32:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:32:20,700 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:20,841 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2022-03-19 06:32:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 06:32:20,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) Word has length 111 [2022-03-19 06:32:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:20,842 INFO L225 Difference]: With dead ends: 126 [2022-03-19 06:32:20,842 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 06:32:20,842 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=489, Invalid=701, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 06:32:20,843 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:20,843 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 147 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 06:32:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-19 06:32:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-03-19 06:32:20,866 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 111 [2022-03-19 06:32:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:20,867 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-03-19 06:32:20,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-03-19 06:32:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 06:32:20,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:20,872 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:20,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:21,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 06:32:21,092 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 988557105, now seen corresponding path program 21 times [2022-03-19 06:32:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:21,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58635501] [2022-03-19 06:32:21,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:21,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:21,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 988557105, now seen corresponding path program 22 times [2022-03-19 06:32:21,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679875681] [2022-03-19 06:32:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:21,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:21,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082576521] [2022-03-19 06:32:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:21,102 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 06:32:21,103 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 06:32:21,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:21,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 06:32:21,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 06:32:21,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:21,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679875681] [2022-03-19 06:32:21,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082576521] [2022-03-19 06:32:21,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082576521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:21,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:21,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 06:32:21,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58635501] [2022-03-19 06:32:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58635501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:21,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:21,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:32:21,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267832949] [2022-03-19 06:32:21,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:21,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:32:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:32:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:32:21,613 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 06:32:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:21,861 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-19 06:32:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:32:21,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2022-03-19 06:32:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:21,862 INFO L225 Difference]: With dead ends: 124 [2022-03-19 06:32:21,862 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 06:32:21,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:32:21,863 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:21,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 914 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 06:32:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-19 06:32:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 18 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-19 06:32:21,873 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 117 [2022-03-19 06:32:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:21,874 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-19 06:32:21,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 06:32:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-19 06:32:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 06:32:21,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:21,874 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:21,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 06:32:22,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 06:32:22,083 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -738576212, now seen corresponding path program 21 times [2022-03-19 06:32:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617162920] [2022-03-19 06:32:22,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:22,087 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:22,087 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash -738576212, now seen corresponding path program 22 times [2022-03-19 06:32:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:22,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633884953] [2022-03-19 06:32:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:22,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:22,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:22,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546722862] [2022-03-19 06:32:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:22,098 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 06:32:22,099 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 06:32:22,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 06:32:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:22,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 26 proven. 288 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 06:32:22,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633884953] [2022-03-19 06:32:22,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546722862] [2022-03-19 06:32:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546722862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:22,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 06:32:22,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617162920] [2022-03-19 06:32:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617162920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:22,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:32:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817162669] [2022-03-19 06:32:22,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:22,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:32:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:32:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:32:22,642 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:22,809 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-03-19 06:32:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 06:32:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Word has length 119 [2022-03-19 06:32:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:22,810 INFO L225 Difference]: With dead ends: 134 [2022-03-19 06:32:22,810 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 06:32:22,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=512, Invalid=748, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 06:32:22,811 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:22,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 06:32:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 06:32:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-03-19 06:32:22,822 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2022-03-19 06:32:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:22,822 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-03-19 06:32:22,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-03-19 06:32:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 06:32:22,823 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:22,823 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:22,844 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 06:32:23,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 06:32:23,032 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash 636252690, now seen corresponding path program 23 times [2022-03-19 06:32:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612010959] [2022-03-19 06:32:23,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:23,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:23,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash 636252690, now seen corresponding path program 24 times [2022-03-19 06:32:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:23,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690370019] [2022-03-19 06:32:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:23,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732360858] [2022-03-19 06:32:23,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:23,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:23,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:23,042 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 06:32:23,043 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 06:41:43,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 06:41:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 06:41:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 28 proven. 312 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 06:41:44,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:44,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690370019] [2022-03-19 06:41:44,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:44,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732360858] [2022-03-19 06:41:44,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732360858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:41:44,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:41:44,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 06:41:44,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612010959] [2022-03-19 06:41:44,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612010959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:44,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:44,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:41:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847701664] [2022-03-19 06:41:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:44,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:41:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:41:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-03-19 06:41:44,825 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 06:41:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:45,113 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-03-19 06:41:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:41:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 125 [2022-03-19 06:41:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:45,114 INFO L225 Difference]: With dead ends: 132 [2022-03-19 06:41:45,114 INFO L226 Difference]: Without dead ends: 126 [2022-03-19 06:41:45,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-03-19 06:41:45,115 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 2 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:45,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1006 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:41:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-19 06:41:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-03-19 06:41:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 19 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:41:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-19 06:41:45,126 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 125 [2022-03-19 06:41:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:45,126 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-19 06:41:45,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 06:41:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-19 06:41:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 06:41:45,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:45,127 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:45,197 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 06:41:45,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 06:41:45,331 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:45,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash -702643, now seen corresponding path program 23 times [2022-03-19 06:41:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:45,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848866082] [2022-03-19 06:41:45,334 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:45,334 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:45,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -702643, now seen corresponding path program 24 times [2022-03-19 06:41:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:45,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851258037] [2022-03-19 06:41:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:45,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:45,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250354611] [2022-03-19 06:41:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:41:45,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:45,342 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 06:41:45,343 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 06:41:46,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-19 06:41:46,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 06:41:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:41:46,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 28 proven. 338 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 06:41:46,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851258037] [2022-03-19 06:41:46,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250354611] [2022-03-19 06:41:46,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250354611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:41:46,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:41:46,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 06:41:46,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848866082] [2022-03-19 06:41:46,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848866082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:46,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:46,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:41:46,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093239675] [2022-03-19 06:41:46,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:46,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:41:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:41:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:41:46,969 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:41:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:47,132 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-03-19 06:41:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 06:41:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) Word has length 127 [2022-03-19 06:41:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:47,133 INFO L225 Difference]: With dead ends: 142 [2022-03-19 06:41:47,134 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 06:41:47,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=535, Invalid=797, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 06:41:47,134 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:47,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 168 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:41:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 06:41:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-19 06:41:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:41:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-03-19 06:41:47,145 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2022-03-19 06:41:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:47,146 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-03-19 06:41:47,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:41:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-03-19 06:41:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 06:41:47,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:47,146 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:47,154 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 06:41:47,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 06:41:47,354 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:47,355 INFO L85 PathProgramCache]: Analyzing trace with hash 95437811, now seen corresponding path program 25 times [2022-03-19 06:41:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:47,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245233756] [2022-03-19 06:41:47,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:47,357 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:47,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash 95437811, now seen corresponding path program 26 times [2022-03-19 06:41:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:47,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230487003] [2022-03-19 06:41:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:47,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:47,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395955877] [2022-03-19 06:41:47,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:41:47,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:47,365 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 06:41:47,365 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 06:41:49,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:41:49,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 06:41:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 30 proven. 364 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 06:41:49,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230487003] [2022-03-19 06:41:49,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395955877] [2022-03-19 06:41:49,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395955877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:41:49,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:41:49,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 06:41:49,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245233756] [2022-03-19 06:41:49,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245233756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:49,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:49,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:41:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167974462] [2022-03-19 06:41:49,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:49,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:41:49,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:41:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:41:49,624 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 06:41:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:49,900 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-03-19 06:41:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:41:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 133 [2022-03-19 06:41:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:49,901 INFO L225 Difference]: With dead ends: 140 [2022-03-19 06:41:49,901 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 06:41:49,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:41:49,902 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:49,902 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:41:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 06:41:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-03-19 06:41:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 20 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:41:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-19 06:41:49,913 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 133 [2022-03-19 06:41:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:49,913 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-19 06:41:49,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 06:41:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-19 06:41:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 06:41:49,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:49,918 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:49,925 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 06:41:50,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:50,119 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -32758546, now seen corresponding path program 25 times [2022-03-19 06:41:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644072802] [2022-03-19 06:41:50,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:50,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:50,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash -32758546, now seen corresponding path program 26 times [2022-03-19 06:41:50,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:50,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099881786] [2022-03-19 06:41:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:50,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96694790] [2022-03-19 06:41:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:41:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:50,129 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 06:41:50,130 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 06:41:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:41:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 06:41:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:41:50,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 30 proven. 392 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 06:41:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:50,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099881786] [2022-03-19 06:41:50,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:50,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96694790] [2022-03-19 06:41:50,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96694790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:41:50,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:41:50,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 06:41:50,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644072802] [2022-03-19 06:41:50,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644072802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:50,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:50,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:41:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516276455] [2022-03-19 06:41:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:50,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:41:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:41:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:41:50,735 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:41:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:50,924 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2022-03-19 06:41:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 06:41:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) Word has length 135 [2022-03-19 06:41:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:50,926 INFO L225 Difference]: With dead ends: 150 [2022-03-19 06:41:50,926 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 06:41:50,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=848, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 06:41:50,926 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:50,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 156 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:41:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 06:41:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-03-19 06:41:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:41:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-03-19 06:41:50,941 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 135 [2022-03-19 06:41:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:50,941 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-03-19 06:41:50,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:41:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-03-19 06:41:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 06:41:50,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:50,942 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:50,959 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 06:41:51,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 06:41:51,147 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1590123308, now seen corresponding path program 27 times [2022-03-19 06:41:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:51,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1962665296] [2022-03-19 06:41:51,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:51,150 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:51,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1590123308, now seen corresponding path program 28 times [2022-03-19 06:41:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:51,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641689189] [2022-03-19 06:41:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:51,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642754736] [2022-03-19 06:41:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:41:51,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:51,172 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 06:41:51,173 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 06:41:51,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:41:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 06:41:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 32 proven. 420 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 06:41:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641689189] [2022-03-19 06:41:51,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642754736] [2022-03-19 06:41:51,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642754736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:41:51,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:41:51,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 06:41:51,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1962665296] [2022-03-19 06:41:51,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1962665296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:51,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:51,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:41:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748121118] [2022-03-19 06:41:51,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:51,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:41:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:41:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:41:51,751 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 06:41:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:52,082 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-19 06:41:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:41:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 141 [2022-03-19 06:41:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:52,083 INFO L225 Difference]: With dead ends: 148 [2022-03-19 06:41:52,083 INFO L226 Difference]: Without dead ends: 142 [2022-03-19 06:41:52,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:41:52,084 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:52,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1238 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:41:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-19 06:41:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-19 06:41:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 21 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 06:41:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-19 06:41:52,115 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 141 [2022-03-19 06:41:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:52,115 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-19 06:41:52,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 06:41:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-19 06:41:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 06:41:52,116 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:52,116 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:52,132 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 06:41:52,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:52,323 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash -654323313, now seen corresponding path program 27 times [2022-03-19 06:41:52,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:52,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420254693] [2022-03-19 06:41:52,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:52,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:52,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -654323313, now seen corresponding path program 28 times [2022-03-19 06:41:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880593338] [2022-03-19 06:41:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:52,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:52,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335756984] [2022-03-19 06:41:52,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:41:52,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:52,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:52,335 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 06:41:52,336 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 06:41:52,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:41:52,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:41:52,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 06:41:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:41:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:41:52,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:41:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 32 proven. 450 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 06:41:52,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:41:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880593338] [2022-03-19 06:41:52,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:41:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335756984] [2022-03-19 06:41:52,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335756984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:41:52,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:41:52,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 06:41:52,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:41:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420254693] [2022-03-19 06:41:52,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420254693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:41:52,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:41:52,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:41:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250577008] [2022-03-19 06:41:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:41:52,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:41:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:41:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:41:52,930 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:41:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:41:53,152 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-03-19 06:41:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 06:41:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Word has length 143 [2022-03-19 06:41:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:41:53,153 INFO L225 Difference]: With dead ends: 158 [2022-03-19 06:41:53,153 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 06:41:53,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=901, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 06:41:53,154 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:41:53,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 189 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:41:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 06:41:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-19 06:41:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 06:41:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-03-19 06:41:53,169 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2022-03-19 06:41:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:41:53,169 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-03-19 06:41:53,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:41:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-03-19 06:41:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 06:41:53,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:41:53,170 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:41:53,187 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 06:41:53,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:53,382 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:41:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:41:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash 780571829, now seen corresponding path program 29 times [2022-03-19 06:41:53,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:41:53,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245576619] [2022-03-19 06:41:53,384 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:41:53,384 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:41:53,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:41:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 780571829, now seen corresponding path program 30 times [2022-03-19 06:41:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:41:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744443099] [2022-03-19 06:41:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:41:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:41:53,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:41:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511218977] [2022-03-19 06:41:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:41:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:41:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:41:53,391 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 06:41:53,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process