/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/cohendiv-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:43:54,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:43:54,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:43:54,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:43:54,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:43:54,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:43:54,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:43:54,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:43:54,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:43:54,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:43:54,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:43:54,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:43:54,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:43:54,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:43:54,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:43:54,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:43:54,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:43:54,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:43:54,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:43:54,134 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:43:54,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:43:54,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:43:54,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:43:54,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:43:54,316 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:43:54,316 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:43:54,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2022-04-06 15:43:54,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8f900ac/1c1bde29910c452395d9410418947022/FLAG6a19c4ac8 [2022-04-06 15:43:54,654 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:43:54,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2022-04-06 15:43:54,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8f900ac/1c1bde29910c452395d9410418947022/FLAG6a19c4ac8 [2022-04-06 15:43:55,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8f900ac/1c1bde29910c452395d9410418947022 [2022-04-06 15:43:55,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:43:55,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:43:55,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:43:55,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:43:55,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:43:55,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec0c743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55, skipping insertion in model container [2022-04-06 15:43:55,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:43:55,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:43:55,233 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/cohendiv-ll_valuebound2.c[576,589] [2022-04-06 15:43:55,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:43:55,257 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:43:55,267 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/cohendiv-ll_valuebound2.c[576,589] [2022-04-06 15:43:55,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:43:55,288 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:43:55,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55 WrapperNode [2022-04-06 15:43:55,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:43:55,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:43:55,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:43:55,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:43:55,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:43:55,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:43:55,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:43:55,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:43:55,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (1/1) ... [2022-04-06 15:43:55,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:43:55,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:55,337 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) [2022-04-06 15:43:55,359 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 [2022-04-06 15:43:55,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:43:55,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:43:55,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:43:55,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:43:55,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:43:55,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:43:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:43:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:43:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:43:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:43:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:43:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:43:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:43:55,418 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:43:55,420 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:43:55,558 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:43:55,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:43:55,562 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:43:55,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:43:55 BoogieIcfgContainer [2022-04-06 15:43:55,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:43:55,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:43:55,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:43:55,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:43:55,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:43:55" (1/3) ... [2022-04-06 15:43:55,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510cc22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:43:55, skipping insertion in model container [2022-04-06 15:43:55,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:55" (2/3) ... [2022-04-06 15:43:55,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510cc22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:43:55, skipping insertion in model container [2022-04-06 15:43:55,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:43:55" (3/3) ... [2022-04-06 15:43:55,568 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2022-04-06 15:43:55,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:43:55,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:43:55,598 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:43:55,614 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 [2022-04-06 15:43:55,614 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:43:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 15:43:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 15:43:55,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:55,642 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:55,642 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-04-06 15:43:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:55,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159563695] [2022-04-06 15:43:55,665 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-04-06 15:43:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:55,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733477159] [2022-04-06 15:43:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:55,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:43:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:55,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:43:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:55,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 15:43:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:55,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:43:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:43:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733477159] [2022-04-06 15:43:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733477159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:55,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:55,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:43:55,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:55,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159563695] [2022-04-06 15:43:55,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159563695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:55,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:55,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:43:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124357885] [2022-04-06 15:43:55,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:55,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 15:43:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 15:43:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:43:55,881 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:43:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:55,975 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-04-06 15:43:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 15:43:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 15:43:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:55,984 INFO L225 Difference]: With dead ends: 71 [2022-04-06 15:43:55,985 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 15:43:55,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:43:55,992 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:55,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 15:43:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 15:43:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 15:43:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 15:43:56,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-04-06 15:43:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:56,030 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 15:43:56,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:43:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 15:43:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 15:43:56,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:56,033 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:56,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:43:56,033 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-04-06 15:43:56,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:56,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840160014] [2022-04-06 15:43:56,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-04-06 15:43:56,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160430846] [2022-04-06 15:43:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:56,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:56,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:56,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076630057] [2022-04-06 15:43:56,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:56,092 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) [2022-04-06 15:43:56,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 15:43:56,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:43:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:43:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:43:56,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160430846] [2022-04-06 15:43:56,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076630057] [2022-04-06 15:43:56,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076630057] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:56,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:56,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:56,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840160014] [2022-04-06 15:43:56,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840160014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:56,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:56,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339774855] [2022-04-06 15:43:56,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:56,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:43:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:43:56,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:43:56,284 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:43:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:56,327 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-04-06 15:43:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:43:56,328 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 15:43:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:56,329 INFO L225 Difference]: With dead ends: 45 [2022-04-06 15:43:56,329 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 15:43:56,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:43:56,330 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:56,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:43:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 15:43:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-06 15:43:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 15:43:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-06 15:43:56,338 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-04-06 15:43:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:56,338 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-06 15:43:56,338 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:43:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-06 15:43:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 15:43:56,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:56,339 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:56,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:56,558 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 [2022-04-06 15:43:56,558 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-04-06 15:43:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557879969] [2022-04-06 15:43:56,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-04-06 15:43:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958748478] [2022-04-06 15:43:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:56,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:56,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411651938] [2022-04-06 15:43:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:56,571 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) [2022-04-06 15:43:56,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 15:43:56,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 15:43:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:43:56,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:56,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958748478] [2022-04-06 15:43:56,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411651938] [2022-04-06 15:43:56,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411651938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:56,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:56,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:43:56,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:56,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557879969] [2022-04-06 15:43:56,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557879969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:56,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:56,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:43:56,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897785173] [2022-04-06 15:43:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:56,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:43:56,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:43:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:43:56,785 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 15:43:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:56,919 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-04-06 15:43:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:43:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-04-06 15:43:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:56,920 INFO L225 Difference]: With dead ends: 57 [2022-04-06 15:43:56,920 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 15:43:56,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:43:56,921 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:56,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 166 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 15:43:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 15:43:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-04-06 15:43:56,931 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-04-06 15:43:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:56,931 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-04-06 15:43:56,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 15:43:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-04-06 15:43:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:43:56,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:56,932 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:56,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:57,147 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 [2022-04-06 15:43:57,148 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-04-06 15:43:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:57,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319634268] [2022-04-06 15:43:57,149 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-04-06 15:43:57,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:57,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104758662] [2022-04-06 15:43:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:57,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558561824] [2022-04-06 15:43:57,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:57,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:57,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:57,159 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) [2022-04-06 15:43:57,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 15:43:57,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:57,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 15:43:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 15:43:57,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 15:43:57,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104758662] [2022-04-06 15:43:57,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558561824] [2022-04-06 15:43:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558561824] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:43:57,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:43:57,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 14 [2022-04-06 15:43:57,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319634268] [2022-04-06 15:43:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319634268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:57,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:57,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263500240] [2022-04-06 15:43:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:57,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:43:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:43:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=151, Unknown=1, NotChecked=0, Total=182 [2022-04-06 15:43:57,871 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:43:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:57,985 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-04-06 15:43:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:43:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-04-06 15:43:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:57,991 INFO L225 Difference]: With dead ends: 59 [2022-04-06 15:43:57,991 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 15:43:57,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2022-04-06 15:43:57,992 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:57,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 102 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 15:43:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 15:43:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-04-06 15:43:58,001 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 40 [2022-04-06 15:43:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:58,001 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-04-06 15:43:58,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:43:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-04-06 15:43:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:43:58,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:58,002 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:58,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:58,202 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 [2022-04-06 15:43:58,203 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-04-06 15:43:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243531768] [2022-04-06 15:43:58,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-04-06 15:43:58,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400509906] [2022-04-06 15:43:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:58,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:58,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696140456] [2022-04-06 15:43:58,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:58,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:58,214 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) [2022-04-06 15:43:58,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 15:43:58,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:58,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:43:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 15:43:58,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:58,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400509906] [2022-04-06 15:43:58,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:58,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696140456] [2022-04-06 15:43:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696140456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:58,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:58,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:58,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243531768] [2022-04-06 15:43:58,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243531768] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:58,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181355156] [2022-04-06 15:43:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:58,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:43:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:43:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:43:58,360 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:43:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:58,449 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-04-06 15:43:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:43:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-06 15:43:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:58,451 INFO L225 Difference]: With dead ends: 63 [2022-04-06 15:43:58,452 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 15:43:58,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:43:58,455 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:58,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 15:43:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 15:43:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-04-06 15:43:58,464 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 50 [2022-04-06 15:43:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:58,464 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-04-06 15:43:58,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:43:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-04-06 15:43:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 15:43:58,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:58,465 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:58,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:58,677 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 [2022-04-06 15:43:58,678 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-04-06 15:43:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:58,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472769223] [2022-04-06 15:43:58,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-04-06 15:43:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:58,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043790030] [2022-04-06 15:43:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:58,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:58,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448672260] [2022-04-06 15:43:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:58,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:58,700 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) [2022-04-06 15:43:58,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 15:43:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:43:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 15:43:58,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 15:43:58,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043790030] [2022-04-06 15:43:58,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448672260] [2022-04-06 15:43:58,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448672260] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:43:58,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:43:58,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 15:43:58,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472769223] [2022-04-06 15:43:58,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472769223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:58,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:58,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:58,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040525100] [2022-04-06 15:43:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:58,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:43:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:43:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:43:58,950 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:43:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:59,024 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-04-06 15:43:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:43:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-04-06 15:43:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:59,026 INFO L225 Difference]: With dead ends: 67 [2022-04-06 15:43:59,027 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 15:43:59,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:43:59,029 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:59,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 121 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:43:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 15:43:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 15:43:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-04-06 15:43:59,048 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 56 [2022-04-06 15:43:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:59,048 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-04-06 15:43:59,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:43:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-04-06 15:43:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 15:43:59,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:59,049 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:59,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:59,249 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 [2022-04-06 15:43:59,250 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-04-06 15:43:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:59,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572726624] [2022-04-06 15:43:59,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-04-06 15:43:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:59,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648637578] [2022-04-06 15:43:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:59,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:59,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384021077] [2022-04-06 15:43:59,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:59,259 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) [2022-04-06 15:43:59,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 15:43:59,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 15:43:59,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 15:43:59,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 15:43:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:59,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648637578] [2022-04-06 15:43:59,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:59,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384021077] [2022-04-06 15:43:59,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384021077] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:43:59,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:43:59,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 15:43:59,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572726624] [2022-04-06 15:43:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572726624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:59,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:59,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:43:59,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962687233] [2022-04-06 15:43:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:59,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:43:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:59,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:43:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:43:59,530 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:43:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:59,672 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2022-04-06 15:43:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:43:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-04-06 15:43:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:59,675 INFO L225 Difference]: With dead ends: 97 [2022-04-06 15:43:59,675 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 15:43:59,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:43:59,676 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:59,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 222 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 15:43:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-04-06 15:43:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 15:43:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-04-06 15:43:59,697 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 63 [2022-04-06 15:43:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:59,698 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-04-06 15:43:59,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:43:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-04-06 15:43:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 15:43:59,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:59,702 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:59,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:59,915 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 [2022-04-06 15:43:59,915 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-04-06 15:43:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:59,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942613208] [2022-04-06 15:43:59,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-04-06 15:43:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79856348] [2022-04-06 15:43:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:59,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:59,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360756352] [2022-04-06 15:43:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:59,931 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) [2022-04-06 15:43:59,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 15:43:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:43:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:44:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 15:44:00,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:44:01,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:44:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79856348] [2022-04-06 15:44:01,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:44:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360756352] [2022-04-06 15:44:01,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360756352] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:44:01,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:44:01,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 15:44:01,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:44:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942613208] [2022-04-06 15:44:01,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942613208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:44:01,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:44:01,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:44:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151364832] [2022-04-06 15:44:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:44:01,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:44:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:44:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:44:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-04-06 15:44:01,733 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 15:44:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:44:02,076 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2022-04-06 15:44:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:44:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2022-04-06 15:44:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:44:02,078 INFO L225 Difference]: With dead ends: 153 [2022-04-06 15:44:02,078 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 15:44:02,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:44:02,079 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:44:02,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 187 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:44:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 15:44:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-04-06 15:44:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 15:44:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2022-04-06 15:44:02,089 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 86 [2022-04-06 15:44:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:44:02,089 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2022-04-06 15:44:02,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 15:44:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2022-04-06 15:44:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 15:44:02,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:44:02,090 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:44:02,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 15:44:02,310 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 [2022-04-06 15:44:02,312 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:44:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:44:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-04-06 15:44:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:44:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821920355] [2022-04-06 15:44:02,313 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:44:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-04-06 15:44:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:44:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192893896] [2022-04-06 15:44:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:44:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:44:02,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:44:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580333705] [2022-04-06 15:44:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:44:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:44:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:44:02,322 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) [2022-04-06 15:44:02,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 15:44:02,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:44:02,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:44:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 15:44:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:44:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-04-06 15:44:02,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:44:02,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:44:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192893896] [2022-04-06 15:44:02,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:44:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580333705] [2022-04-06 15:44:02,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580333705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:44:02,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:44:02,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:44:02,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:44:02,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821920355] [2022-04-06 15:44:02,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821920355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:44:02,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:44:02,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:44:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159148339] [2022-04-06 15:44:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:44:02,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:44:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:44:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:44:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:44:02,477 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 15:44:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:44:02,536 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2022-04-06 15:44:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:44:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-04-06 15:44:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:44:02,537 INFO L225 Difference]: With dead ends: 157 [2022-04-06 15:44:02,537 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 15:44:02,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:44:02,541 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:44:02,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:44:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 15:44:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-04-06 15:44:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 61 states have internal predecessors, (65), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 15:44:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-04-06 15:44:02,553 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 93 [2022-04-06 15:44:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:44:02,553 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-04-06 15:44:02,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 15:44:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-04-06 15:44:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 15:44:02,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:44:02,555 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:44:02,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 15:44:02,767 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 [2022-04-06 15:44:02,768 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:44:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:44:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-04-06 15:44:02,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:44:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118130912] [2022-04-06 15:44:02,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:44:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-04-06 15:44:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:44:02,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831999117] [2022-04-06 15:44:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:44:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:44:02,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:44:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080724810] [2022-04-06 15:44:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:44:02,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:44:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:44:02,777 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) [2022-04-06 15:44:02,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 15:44:02,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:44:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:44:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 15:44:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:44:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-04-06 15:44:03,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:44:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-04-06 15:44:03,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:44:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831999117] [2022-04-06 15:44:03,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:44:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080724810] [2022-04-06 15:44:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080724810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:44:03,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:44:03,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-04-06 15:44:03,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:44:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118130912] [2022-04-06 15:44:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118130912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:44:03,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:44:03,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:44:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55034487] [2022-04-06 15:44:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:44:03,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:44:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:44:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:44:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:44:03,371 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 15:44:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:44:03,615 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-04-06 15:44:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:44:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2022-04-06 15:44:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:44:03,617 INFO L225 Difference]: With dead ends: 113 [2022-04-06 15:44:03,617 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 15:44:03,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:44:03,617 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:44:03,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:44:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 15:44:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 15:44:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 15:44:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 15:44:03,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2022-04-06 15:44:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:44:03,618 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 15:44:03,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 15:44:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 15:44:03,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 15:44:03,620 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 15:44:03,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 15:44:03,831 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 [2022-04-06 15:44:03,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 15:44:05,648 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 15:44:05,648 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 15:44:05,648 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 15:44:05,648 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 15:44:05,648 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 15:44:05,648 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 15:44:05,648 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 15:44:05,648 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~y~0 2) (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~x~0 2)) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 15:44:05,649 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 15:44:05,649 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 15:44:05,649 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse2 (<= 1 main_~y~0)) (.cse0 (<= main_~y~0 2)) (.cse1 (<= 0 main_~x~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and (= main_~x~0 main_~r~0) .cse0 .cse1 (= (mod main_~b~0 2) 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse2 .cse3 .cse4) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse2 .cse3 .cse4) (and (< main_~r~0 main_~y~0) .cse0 .cse1 (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse3 .cse4))) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse2 (<= main_~x~0 2))) (or (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse3 (= main_~b~0 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (< main_~r~0 main_~y~0) .cse3 (<= 0 main_~x~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2))) [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and .cse0 (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse0 (= main_~q~0 0) .cse1) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse1 .cse2 (<= main_~x~0 2)))) [2022-04-06 15:44:05,649 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-04-06 15:44:05,649 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse8 (* main_~a~0 main_~y~0))) (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (<= (* 2 .cse8) main_~r~0)) (.cse3 (<= 1 main_~r~0)) (.cse4 (= main_~q~0 0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (= main_~b~0 .cse8)) (.cse7 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 (= (mod main_~b~0 2) 0) .cse3 .cse4 .cse5 .cse6 .cse7)))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse8 (* main_~a~0 main_~y~0))) (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (<= (* 2 .cse8) main_~r~0)) (.cse3 (<= 1 main_~r~0)) (.cse4 (= main_~q~0 0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (= main_~b~0 .cse8)) (.cse7 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 (= (mod main_~b~0 2) 0) .cse3 .cse4 .cse5 .cse6 .cse7)))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (< main_~r~0 (* main_~b~0 2))) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= main_~y~0 2) .cse1 (<= 1 main_~r~0) (= main_~b~0 main_~y~0) .cse2 .cse3 .cse4) (and .cse0 .cse1 (<= (* main_~y~0 2) main_~r~0) .cse2 (= main_~a~0 2) .cse3 .cse4))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse2 (<= main_~x~0 2))) (or (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse3 (= main_~b~0 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (< main_~r~0 main_~y~0) .cse3 (<= 0 main_~x~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse2 (<= 1 main_~y~0)) (.cse0 (<= main_~y~0 2)) (.cse1 (<= 0 main_~x~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and (= main_~x~0 main_~r~0) .cse0 .cse1 (= (mod main_~b~0 2) 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse2 .cse3 .cse4) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse2 .cse3 .cse4) (and (< main_~r~0 main_~y~0) .cse0 .cse1 (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse3 .cse4))) [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:44:05,650 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:44:05,650 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:44:05,651 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 15:44:05,653 INFO L719 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2, 2, 2, 2] [2022-04-06 15:44:05,653 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 15:44:05,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 03:44:05 BoogieIcfgContainer [2022-04-06 15:44:05,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 15:44:05,664 INFO L158 Benchmark]: Toolchain (without parser) took 10565.08ms. Allocated memory was 228.6MB in the beginning and 336.6MB in the end (delta: 108.0MB). Free memory was 180.1MB in the beginning and 305.2MB in the end (delta: -125.1MB). Peak memory consumption was 169.4MB. Max. memory is 8.0GB. [2022-04-06 15:44:05,664 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory was 196.7MB in the beginning and 196.6MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 15:44:05,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.48ms. Allocated memory is still 228.6MB. Free memory was 180.0MB in the beginning and 205.2MB in the end (delta: -25.3MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-04-06 15:44:05,664 INFO L158 Benchmark]: Boogie Preprocessor took 22.01ms. Allocated memory is still 228.6MB. Free memory was 205.2MB in the beginning and 204.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 15:44:05,664 INFO L158 Benchmark]: RCFGBuilder took 252.28ms. Allocated memory is still 228.6MB. Free memory was 204.2MB in the beginning and 193.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 15:44:05,665 INFO L158 Benchmark]: TraceAbstraction took 10098.90ms. Allocated memory was 228.6MB in the beginning and 336.6MB in the end (delta: 108.0MB). Free memory was 192.7MB in the beginning and 305.2MB in the end (delta: -112.5MB). Peak memory consumption was 182.7MB. Max. memory is 8.0GB. [2022-04-06 15:44:05,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory was 196.7MB in the beginning and 196.6MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.48ms. Allocated memory is still 228.6MB. Free memory was 180.0MB in the beginning and 205.2MB in the end (delta: -25.3MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.01ms. Allocated memory is still 228.6MB. Free memory was 205.2MB in the beginning and 204.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 252.28ms. Allocated memory is still 228.6MB. Free memory was 204.2MB in the beginning and 193.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 10098.90ms. Allocated memory was 228.6MB in the beginning and 336.6MB in the end (delta: 108.0MB). Free memory was 192.7MB in the beginning and 305.2MB in the end (delta: -112.5MB). Peak memory consumption was 182.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.1s, OverallIterations: 10, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 1415 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1014 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1383 IncrementalHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 401 mSDtfsCounter, 1383 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 904 GetRequests, 796 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=8, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 14 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 397 PreInvPairs, 514 NumberOfFragments, 1192 HoareAnnotationTreeSize, 397 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 39 FomulaSimplificationsInter, 1318 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((x == r && y * 2 <= r) && q == 0) && a == 2) && 1 <= y) && b == a * y) && x <= 2) || ((((((((x == r && y <= 2) && b % 2 == 0) && 1 <= r) && -1 * b / -4 <= r / 4) && q == 0) && 1 <= y) && b == a * y) && x <= 2)) || (((((((x == r && y <= 2) && 1 <= r) && b == y) && q == 0) && 1 <= y) && b == a * y) && x <= 2) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((q == 2 && 0 <= r) && x == r + y * 2) && 1 <= y) && b == a * y) && x <= 2) || (((((((x == r && y <= 2) && b == 0) && -1 * b / -4 <= r / 4) && q == 0) && 1 <= y) && b == a * y) && x <= 2)) || (((((((r < y && y <= 2) && 0 <= x) && b <= y) && x == y + r) && q == 1) && b == a * y) && x <= 2) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-06 15:44:05,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...