/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/egcd-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:53:36,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:53:36,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:53:36,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:53:36,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:53:36,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:53:36,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:53:36,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:53:36,307 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:53:36,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:53:36,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:53:36,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:53:36,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:53:36,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:53:36,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:53:36,312 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:53:36,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:53:36,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:53:36,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:53:36,514 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:53:36,515 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:53:36,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-03-20 14:53:36,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad393c15/6c08df000fa34567a37b82d07c4a15b5/FLAG58255c4ad [2022-03-20 14:53:36,944 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:53:36,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-03-20 14:53:36,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad393c15/6c08df000fa34567a37b82d07c4a15b5/FLAG58255c4ad [2022-03-20 14:53:36,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad393c15/6c08df000fa34567a37b82d07c4a15b5 [2022-03-20 14:53:36,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:53:36,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:53:36,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:53:36,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:53:36,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:53:36,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:53:36" (1/1) ... [2022-03-20 14:53:36,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be2c0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:36, skipping insertion in model container [2022-03-20 14:53:36,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:53:36" (1/1) ... [2022-03-20 14:53:36,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:53:36,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:53:37,168 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c[489,502] [2022-03-20 14:53:37,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:53:37,203 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:53:37,213 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c[489,502] [2022-03-20 14:53:37,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:53:37,228 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:53:37,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37 WrapperNode [2022-03-20 14:53:37,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:53:37,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:53:37,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:53:37,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:53:37,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:53:37,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:53:37,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:53:37,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:53:37,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (1/1) ... [2022-03-20 14:53:37,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:53:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:37,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 14:53:37,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:53:37,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:53:37,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:53:37,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:53:37,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:53:37,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:53:37,365 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:53:37,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:53:37,477 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:53:37,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:53:37,482 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:53:37,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:53:37 BoogieIcfgContainer [2022-03-20 14:53:37,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:53:37,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:53:37,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:53:37,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:53:37,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:53:36" (1/3) ... [2022-03-20 14:53:37,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a19c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:53:37, skipping insertion in model container [2022-03-20 14:53:37,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:53:37" (2/3) ... [2022-03-20 14:53:37,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a19c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:53:37, skipping insertion in model container [2022-03-20 14:53:37,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:53:37" (3/3) ... [2022-03-20 14:53:37,489 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2022-03-20 14:53:37,493 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:53:37,493 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:53:37,521 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:53:37,526 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 14:53:37,526 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:53:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:53:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 14:53:37,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:37,542 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:37,542 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-03-20 14:53:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902797619] [2022-03-20 14:53:37,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-03-20 14:53:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:37,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623503802] [2022-03-20 14:53:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:37,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:53:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:37,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:53:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:37,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:53:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:53:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623503802] [2022-03-20 14:53:37,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623503802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:37,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:37,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:53:37,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902797619] [2022-03-20 14:53:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902797619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:53:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620108297] [2022-03-20 14:53:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:37,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:53:37,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:53:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:53:37,811 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:53:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:37,900 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-20 14:53:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:53:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 14:53:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:37,910 INFO L225 Difference]: With dead ends: 64 [2022-03-20 14:53:37,910 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 14:53:37,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:53:37,917 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:37,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 14:53:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 14:53:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 14:53:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 14:53:37,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-20 14:53:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:37,956 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 14:53:37,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:53:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 14:53:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:53:37,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:37,959 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:37,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:53:37,960 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-03-20 14:53:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331939494] [2022-03-20 14:53:37,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-03-20 14:53:37,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649845172] [2022-03-20 14:53:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:38,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:53:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:53:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:53:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:53:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:53:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649845172] [2022-03-20 14:53:38,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649845172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331939494] [2022-03-20 14:53:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331939494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094124472] [2022-03-20 14:53:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:38,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:53:38,114 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:53:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:38,214 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-20 14:53:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:53:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 14:53:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:38,217 INFO L225 Difference]: With dead ends: 42 [2022-03-20 14:53:38,217 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 14:53:38,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:53:38,219 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:38,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 14:53:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 14:53:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 14:53:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 14:53:38,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-20 14:53:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:38,235 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 14:53:38,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:53:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 14:53:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:53:38,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:38,237 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:38,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:53:38,237 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:38,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-03-20 14:53:38,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437758616] [2022-03-20 14:53:38,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-03-20 14:53:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:38,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616589904] [2022-03-20 14:53:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:38,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:38,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826012979] [2022-03-20 14:53:38,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:38,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:38,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:38,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:38,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:53:38,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:53:38,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:53:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:53:38,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:53:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616589904] [2022-03-20 14:53:38,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826012979] [2022-03-20 14:53:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826012979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437758616] [2022-03-20 14:53:38,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437758616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709207732] [2022-03-20 14:53:38,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:38,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:53:38,459 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:53:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:38,504 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-20 14:53:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 14:53:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:38,507 INFO L225 Difference]: With dead ends: 49 [2022-03-20 14:53:38,507 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 14:53:38,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:53:38,509 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:38,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 14:53:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 14:53:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 14:53:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-20 14:53:38,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-20 14:53:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:38,518 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-20 14:53:38,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:53:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-20 14:53:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 14:53:38,519 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:38,519 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:38,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 14:53:38,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:38,740 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-03-20 14:53:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [353765597] [2022-03-20 14:53:38,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-03-20 14:53:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:38,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112248056] [2022-03-20 14:53:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:38,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087790692] [2022-03-20 14:53:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:38,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:38,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:38,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:38,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:53:38,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:53:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:53:38,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:53:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:38,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112248056] [2022-03-20 14:53:38,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087790692] [2022-03-20 14:53:38,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087790692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:38,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [353765597] [2022-03-20 14:53:38,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [353765597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:38,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:38,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877609244] [2022-03-20 14:53:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:38,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:53:38,901 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:53:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:38,944 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-20 14:53:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 14:53:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:38,946 INFO L225 Difference]: With dead ends: 53 [2022-03-20 14:53:38,946 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 14:53:38,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:53:38,950 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:38,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 14:53:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 14:53:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 14:53:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-20 14:53:38,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-20 14:53:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:38,966 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-20 14:53:38,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:53:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-20 14:53:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:53:38,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:38,968 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:38,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:39,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 14:53:39,178 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-03-20 14:53:39,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:39,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1033468362] [2022-03-20 14:53:39,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-03-20 14:53:39,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432759470] [2022-03-20 14:53:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:39,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:39,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:39,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090388581] [2022-03-20 14:53:39,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:39,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:39,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:39,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:53:39,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 14:53:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 14:53:39,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:53:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432759470] [2022-03-20 14:53:39,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090388581] [2022-03-20 14:53:39,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090388581] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:53:39,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:53:39,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 14:53:39,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:39,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1033468362] [2022-03-20 14:53:39,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1033468362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:39,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:39,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:39,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627199685] [2022-03-20 14:53:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:39,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:39,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:53:39,501 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:53:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:39,557 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-20 14:53:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:39,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 14:53:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:39,560 INFO L225 Difference]: With dead ends: 75 [2022-03-20 14:53:39,560 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 14:53:39,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:53:39,562 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:39,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 14:53:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 14:53:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:53:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-20 14:53:39,574 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-20 14:53:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:39,574 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-20 14:53:39,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:53:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-20 14:53:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 14:53:39,575 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:39,575 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:39,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:39,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:39,792 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-03-20 14:53:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:39,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415386636] [2022-03-20 14:53:39,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-03-20 14:53:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:39,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080515586] [2022-03-20 14:53:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:39,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887093756] [2022-03-20 14:53:39,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:39,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:39,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:53:39,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:53:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:53:39,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:53:39,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080515586] [2022-03-20 14:53:39,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887093756] [2022-03-20 14:53:39,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887093756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:39,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:39,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:39,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:39,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415386636] [2022-03-20 14:53:39,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415386636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:39,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:39,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544925964] [2022-03-20 14:53:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:39,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:53:39,939 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 14:53:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:39,983 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-20 14:53:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-20 14:53:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:39,988 INFO L225 Difference]: With dead ends: 87 [2022-03-20 14:53:39,988 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 14:53:39,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:53:39,990 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:39,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 14:53:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-20 14:53:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 14:53:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-20 14:53:40,009 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-20 14:53:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:40,010 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-20 14:53:40,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 14:53:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-20 14:53:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 14:53:40,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:40,016 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:40,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 14:53:40,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:40,232 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-03-20 14:53:40,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:40,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251875618] [2022-03-20 14:53:40,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-03-20 14:53:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974584412] [2022-03-20 14:53:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:40,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:40,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:40,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746515143] [2022-03-20 14:53:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:40,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:40,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:40,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:53:40,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:53:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:53:40,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:53:40,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:40,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974584412] [2022-03-20 14:53:40,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:40,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746515143] [2022-03-20 14:53:40,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746515143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:40,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:40,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 14:53:40,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251875618] [2022-03-20 14:53:40,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251875618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:40,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:40,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309643412] [2022-03-20 14:53:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:40,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:53:40,462 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 14:53:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:40,507 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-20 14:53:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:53:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 14:53:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:40,508 INFO L225 Difference]: With dead ends: 121 [2022-03-20 14:53:40,508 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 14:53:40,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:53:40,509 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:40,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 14:53:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-20 14:53:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 14:53:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-20 14:53:40,530 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-20 14:53:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:40,530 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-20 14:53:40,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 14:53:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-20 14:53:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 14:53:40,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:40,531 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:40,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:40,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:40,732 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-03-20 14:53:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:40,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1870731247] [2022-03-20 14:53:40,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-03-20 14:53:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:40,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304829291] [2022-03-20 14:53:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:40,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536736207] [2022-03-20 14:53:40,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:40,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:40,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:40,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:40,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:53:40,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:40,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:53:40,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 14:53:40,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:53:40,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:40,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304829291] [2022-03-20 14:53:40,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:40,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536736207] [2022-03-20 14:53:40,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536736207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:40,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:40,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1870731247] [2022-03-20 14:53:40,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1870731247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:40,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114522289] [2022-03-20 14:53:40,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:40,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:53:40,907 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:53:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:40,944 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-20 14:53:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 14:53:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:40,947 INFO L225 Difference]: With dead ends: 106 [2022-03-20 14:53:40,947 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 14:53:40,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:53:40,948 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:40,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 14:53:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 14:53:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:53:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-20 14:53:40,967 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-20 14:53:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:40,969 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-20 14:53:40,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:53:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-20 14:53:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 14:53:40,971 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:40,971 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:40,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:41,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:41,191 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-03-20 14:53:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900472019] [2022-03-20 14:53:41,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-03-20 14:53:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:41,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309032073] [2022-03-20 14:53:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:41,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:41,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:41,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032354524] [2022-03-20 14:53:41,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:41,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:41,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:53:41,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:41,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 14:53:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 14:53:41,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 14:53:41,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:41,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309032073] [2022-03-20 14:53:41,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032354524] [2022-03-20 14:53:41,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032354524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:41,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:41,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 14:53:41,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900472019] [2022-03-20 14:53:41,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900472019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:41,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:41,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:53:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327563425] [2022-03-20 14:53:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:41,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:53:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:53:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:53:41,459 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 14:53:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:41,547 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-20 14:53:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:53:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-20 14:53:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:41,548 INFO L225 Difference]: With dead ends: 118 [2022-03-20 14:53:41,549 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 14:53:41,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:53:41,549 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:41,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 14:53:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-20 14:53:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 14:53:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-20 14:53:41,559 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-20 14:53:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:41,560 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-20 14:53:41,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 14:53:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-20 14:53:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 14:53:41,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:41,560 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:41,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:41,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:41,780 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-03-20 14:53:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032860915] [2022-03-20 14:53:41,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-03-20 14:53:41,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:41,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216487892] [2022-03-20 14:53:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:41,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:41,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485321127] [2022-03-20 14:53:41,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:53:41,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:41,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:41,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:41,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:53:41,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:53:41,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:53:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:53:42,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:53:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216487892] [2022-03-20 14:53:42,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:42,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485321127] [2022-03-20 14:53:42,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485321127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:42,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:42,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:53:42,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:42,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032860915] [2022-03-20 14:53:42,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032860915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:42,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:42,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:53:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858409520] [2022-03-20 14:53:42,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:42,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:53:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:53:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:53:42,110 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 14:53:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:42,173 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-20 14:53:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:53:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-03-20 14:53:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:42,174 INFO L225 Difference]: With dead ends: 131 [2022-03-20 14:53:42,174 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 14:53:42,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:53:42,175 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:42,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 210 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 14:53:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-20 14:53:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 14:53:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-03-20 14:53:42,186 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-03-20 14:53:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:42,187 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-03-20 14:53:42,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 14:53:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-03-20 14:53:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 14:53:42,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:42,187 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:42,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:42,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 14:53:42,402 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-03-20 14:53:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522906345] [2022-03-20 14:53:42,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-03-20 14:53:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637344517] [2022-03-20 14:53:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:42,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:42,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201493576] [2022-03-20 14:53:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:42,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:42,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:42,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 14:53:42,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:53:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 14:53:42,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 14:53:42,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637344517] [2022-03-20 14:53:42,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201493576] [2022-03-20 14:53:42,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201493576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:42,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:42,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 14:53:42,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522906345] [2022-03-20 14:53:42,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522906345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:42,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:42,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:53:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507490970] [2022-03-20 14:53:42,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:42,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:53:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:53:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:53:42,874 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 14:53:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:43,053 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-03-20 14:53:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:53:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-03-20 14:53:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:43,054 INFO L225 Difference]: With dead ends: 160 [2022-03-20 14:53:43,054 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 14:53:43,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:43,055 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:43,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 14:53:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 14:53:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 14:53:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-03-20 14:53:43,069 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-03-20 14:53:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:43,069 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-03-20 14:53:43,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 14:53:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-03-20 14:53:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 14:53:43,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:43,070 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:43,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:43,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:43,277 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-03-20 14:53:43,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:43,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838147246] [2022-03-20 14:53:43,278 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-03-20 14:53:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:43,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456003382] [2022-03-20 14:53:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:43,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:43,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043293839] [2022-03-20 14:53:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:53:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:43,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:43,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 14:53:43,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:53:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:53:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:53:43,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:53:43,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456003382] [2022-03-20 14:53:43,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043293839] [2022-03-20 14:53:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043293839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:43,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:43,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 14:53:43,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838147246] [2022-03-20 14:53:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838147246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:43,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:53:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943437910] [2022-03-20 14:53:43,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:43,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:53:43,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:53:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:53:43,620 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:53:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:43,670 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-03-20 14:53:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:53:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-20 14:53:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:43,671 INFO L225 Difference]: With dead ends: 199 [2022-03-20 14:53:43,671 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 14:53:43,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:53:43,672 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:43,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 14:53:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 14:53:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 14:53:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-03-20 14:53:43,687 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-03-20 14:53:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:43,687 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-03-20 14:53:43,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:53:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-03-20 14:53:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 14:53:43,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:43,688 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:43,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:43,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 14:53:43,906 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-03-20 14:53:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554360871] [2022-03-20 14:53:43,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-03-20 14:53:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784655128] [2022-03-20 14:53:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:43,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88827369] [2022-03-20 14:53:43,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:43,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:43,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:43,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 14:53:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:53:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:53:44,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-20 14:53:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784655128] [2022-03-20 14:53:44,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88827369] [2022-03-20 14:53:44,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88827369] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 14:53:44,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:53:44,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 14:53:44,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554360871] [2022-03-20 14:53:44,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554360871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:44,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:44,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:53:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385308555] [2022-03-20 14:53:44,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:44,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:53:44,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:44,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:53:44,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:53:44,308 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:53:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:44,351 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-03-20 14:53:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:53:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-03-20 14:53:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:44,353 INFO L225 Difference]: With dead ends: 179 [2022-03-20 14:53:44,353 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 14:53:44,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:53:44,354 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:44,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 14:53:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-03-20 14:53:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 14:53:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-03-20 14:53:44,372 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-03-20 14:53:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:44,372 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-03-20 14:53:44,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 14:53:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-03-20 14:53:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 14:53:44,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:44,374 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:44,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:44,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 14:53:44,595 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-03-20 14:53:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301680189] [2022-03-20 14:53:44,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-03-20 14:53:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497570491] [2022-03-20 14:53:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:44,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648406588] [2022-03-20 14:53:44,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:53:44,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:44,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:44,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 14:53:44,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:53:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 14:53:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 14:53:44,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 14:53:45,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497570491] [2022-03-20 14:53:45,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648406588] [2022-03-20 14:53:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648406588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:45,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:45,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 14:53:45,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301680189] [2022-03-20 14:53:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301680189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:45,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:45,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:53:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27015468] [2022-03-20 14:53:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:45,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:53:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:53:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:45,275 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:53:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:45,456 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-03-20 14:53:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:53:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-20 14:53:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:45,457 INFO L225 Difference]: With dead ends: 199 [2022-03-20 14:53:45,457 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 14:53:45,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:53:45,458 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:45,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 242 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 14:53:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-03-20 14:53:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 14:53:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-03-20 14:53:45,473 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-03-20 14:53:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:45,473 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-03-20 14:53:45,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:53:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-03-20 14:53:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 14:53:45,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:45,474 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:45,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 14:53:45,693 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-03-20 14:53:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:45,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258278468] [2022-03-20 14:53:45,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-03-20 14:53:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:45,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327518384] [2022-03-20 14:53:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:45,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:45,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145157247] [2022-03-20 14:53:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:53:45,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:45,728 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:45,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 14:53:45,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:53:45,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:53:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 14:53:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 14:53:46,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327518384] [2022-03-20 14:53:46,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145157247] [2022-03-20 14:53:46,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145157247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:46,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:46,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 14:53:46,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258278468] [2022-03-20 14:53:46,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258278468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:46,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:46,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:53:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288416674] [2022-03-20 14:53:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:46,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:53:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:53:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:46,389 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:53:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:46,583 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-03-20 14:53:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:53:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-20 14:53:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:46,585 INFO L225 Difference]: With dead ends: 208 [2022-03-20 14:53:46,585 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 14:53:46,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:53:46,587 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:46,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 268 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 14:53:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-03-20 14:53:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 14:53:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-03-20 14:53:46,610 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-03-20 14:53:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:46,610 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-03-20 14:53:46,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:53:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-03-20 14:53:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 14:53:46,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:46,611 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:46,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:46,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 14:53:46,827 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-03-20 14:53:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539162206] [2022-03-20 14:53:46,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-03-20 14:53:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323012320] [2022-03-20 14:53:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:46,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475445349] [2022-03-20 14:53:46,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:53:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:46,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:46,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 14:53:46,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:53:46,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 14:53:46,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 14:53:47,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 14:53:47,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323012320] [2022-03-20 14:53:47,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475445349] [2022-03-20 14:53:47,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475445349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:47,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:47,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 14:53:47,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539162206] [2022-03-20 14:53:47,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539162206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:47,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:53:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297530656] [2022-03-20 14:53:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:47,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:53:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:53:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:47,349 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 14:53:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:47,591 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-03-20 14:53:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:53:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-03-20 14:53:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:47,593 INFO L225 Difference]: With dead ends: 214 [2022-03-20 14:53:47,593 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 14:53:47,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:53:47,594 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:47,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 261 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:53:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 14:53:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-03-20 14:53:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 14:53:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-03-20 14:53:47,628 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-03-20 14:53:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:47,629 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-03-20 14:53:47,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 14:53:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-03-20 14:53:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 14:53:47,630 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:47,630 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:47,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:47,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:47,848 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:47,848 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-03-20 14:53:47,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:47,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393796259] [2022-03-20 14:53:47,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-03-20 14:53:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:47,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446093457] [2022-03-20 14:53:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:47,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:47,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24841419] [2022-03-20 14:53:47,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:53:47,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:47,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:47,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:47,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 14:53:47,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:53:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:47,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 14:53:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 14:53:48,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 14:53:48,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446093457] [2022-03-20 14:53:48,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24841419] [2022-03-20 14:53:48,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24841419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:48,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:48,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 14:53:48,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393796259] [2022-03-20 14:53:48,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393796259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:48,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:48,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:53:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600384557] [2022-03-20 14:53:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:48,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:53:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:53:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:48,463 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:53:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:48,664 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-03-20 14:53:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:53:48,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-03-20 14:53:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:48,665 INFO L225 Difference]: With dead ends: 219 [2022-03-20 14:53:48,665 INFO L226 Difference]: Without dead ends: 210 [2022-03-20 14:53:48,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:53:48,666 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:48,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:53:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-20 14:53:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-03-20 14:53:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 14:53:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-03-20 14:53:48,685 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-03-20 14:53:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:48,685 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-03-20 14:53:48,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:53:48,686 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-03-20 14:53:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 14:53:48,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:48,686 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:48,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:48,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 14:53:48,907 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-03-20 14:53:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503468486] [2022-03-20 14:53:48,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-03-20 14:53:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:48,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561986684] [2022-03-20 14:53:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:48,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:48,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885928521] [2022-03-20 14:53:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:53:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:48,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:48,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 14:53:48,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 14:53:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 14:53:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 14:53:49,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 14:53:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:49,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561986684] [2022-03-20 14:53:49,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:49,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885928521] [2022-03-20 14:53:49,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885928521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:49,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:49,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 14:53:49,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:49,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503468486] [2022-03-20 14:53:49,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503468486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:49,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:49,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:53:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774446056] [2022-03-20 14:53:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:49,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:53:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:53:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:53:49,267 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:53:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:49,338 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-03-20 14:53:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:53:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-03-20 14:53:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:49,340 INFO L225 Difference]: With dead ends: 277 [2022-03-20 14:53:49,340 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 14:53:49,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:53:49,341 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:49,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:53:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 14:53:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-03-20 14:53:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 14:53:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-03-20 14:53:49,360 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-03-20 14:53:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:49,360 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-03-20 14:53:49,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 14:53:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-03-20 14:53:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 14:53:49,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:49,361 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:49,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:49,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 14:53:49,579 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-03-20 14:53:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:49,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [427078428] [2022-03-20 14:53:49,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-03-20 14:53:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:49,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619761261] [2022-03-20 14:53:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:49,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:49,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:49,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169447752] [2022-03-20 14:53:49,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:49,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:49,594 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:49,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 14:53:49,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 14:53:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 14:53:50,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 14:53:50,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619761261] [2022-03-20 14:53:50,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169447752] [2022-03-20 14:53:50,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169447752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:50,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:50,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 14:53:50,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [427078428] [2022-03-20 14:53:50,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [427078428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:50,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:50,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:53:50,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47031091] [2022-03-20 14:53:50,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:50,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:53:50,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:53:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:53:50,443 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:50,768 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-03-20 14:53:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:53:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-20 14:53:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:50,770 INFO L225 Difference]: With dead ends: 256 [2022-03-20 14:53:50,770 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 14:53:50,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:53:50,772 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:50,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 374 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:53:50,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 14:53:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-03-20 14:53:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 14:53:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-03-20 14:53:50,798 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-03-20 14:53:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:50,798 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-03-20 14:53:50,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-03-20 14:53:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 14:53:50,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:50,800 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:50,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:51,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:51,020 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-03-20 14:53:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568793839] [2022-03-20 14:53:51,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-03-20 14:53:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:51,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857132422] [2022-03-20 14:53:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:51,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:51,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090837051] [2022-03-20 14:53:51,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:53:51,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:51,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:51,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:51,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 14:53:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:53:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:53:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 14:53:51,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 14:53:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857132422] [2022-03-20 14:53:52,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090837051] [2022-03-20 14:53:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090837051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:52,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:52,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 14:53:52,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:52,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568793839] [2022-03-20 14:53:52,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568793839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:52,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:52,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:53:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569703529] [2022-03-20 14:53:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:52,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:53:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:53:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:53:52,006 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:52,186 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-03-20 14:53:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:53:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-20 14:53:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:52,188 INFO L225 Difference]: With dead ends: 286 [2022-03-20 14:53:52,188 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 14:53:52,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:53:52,189 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:52,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 346 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:53:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 14:53:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-03-20 14:53:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 14:53:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-03-20 14:53:52,216 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-03-20 14:53:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:52,216 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-03-20 14:53:52,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-03-20 14:53:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 14:53:52,217 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:52,217 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:52,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 14:53:52,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:52,436 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-03-20 14:53:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [554620026] [2022-03-20 14:53:52,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-03-20 14:53:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:52,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775489411] [2022-03-20 14:53:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:52,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353352997] [2022-03-20 14:53:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:53:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:52,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:52,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 14:53:52,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:53:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 14:53:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 65 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 14:53:53,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-20 14:53:53,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:53:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775489411] [2022-03-20 14:53:53,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:53:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353352997] [2022-03-20 14:53:53,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353352997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:53:53,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:53:53,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 14:53:53,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:53:53,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [554620026] [2022-03-20 14:53:53,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [554620026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:53:53,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:53:53,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:53:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535663124] [2022-03-20 14:53:53,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:53:53,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:53:53,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:53:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:53:53,229 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:53:53,734 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-03-20 14:53:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:53:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-20 14:53:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:53:53,736 INFO L225 Difference]: With dead ends: 297 [2022-03-20 14:53:53,737 INFO L226 Difference]: Without dead ends: 295 [2022-03-20 14:53:53,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:53:53,737 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:53:53,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 315 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:53:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-20 14:53:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-03-20 14:53:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 14:53:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-03-20 14:53:53,761 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-03-20 14:53:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:53:53,762 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-03-20 14:53:53,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:53:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-03-20 14:53:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 14:53:53,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:53:53,763 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:53:53,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 14:53:53,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:53,980 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:53:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:53:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-03-20 14:53:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:53:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533944318] [2022-03-20 14:53:53,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:53:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-03-20 14:53:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:53:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857095714] [2022-03-20 14:53:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:53:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:53:53,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:53:53,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564793092] [2022-03-20 14:53:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:53:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:53:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:53:53,988 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:53:54,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 14:53:54,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:53:54,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:53:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 14:53:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:53:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-20 14:53:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:53:54,508 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:53:54,511 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:54:27,242 WARN L232 SmtUtils]: Spent 23.91s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:54:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857095714] [2022-03-20 14:54:27,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564793092] [2022-03-20 14:54:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564793092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:54:27,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:54:27,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 14:54:27,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533944318] [2022-03-20 14:54:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533944318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:27,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:27,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:54:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584438213] [2022-03-20 14:54:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:27,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:54:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:54:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-03-20 14:54:27,245 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:54:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:27,660 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-03-20 14:54:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:54:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-03-20 14:54:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:27,662 INFO L225 Difference]: With dead ends: 315 [2022-03-20 14:54:27,662 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 14:54:27,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2022-03-20 14:54:27,664 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:27,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 288 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:54:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 14:54:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-03-20 14:54:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 14:54:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-03-20 14:54:27,697 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-03-20 14:54:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:27,697 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-03-20 14:54:27,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:54:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-03-20 14:54:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 14:54:27,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:27,698 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:27,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:27,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 14:54:27,911 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-03-20 14:54:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [129884214] [2022-03-20 14:54:27,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:27,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-03-20 14:54:27,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:27,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479839784] [2022-03-20 14:54:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:27,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:27,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:27,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541945819] [2022-03-20 14:54:27,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:54:27,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:27,922 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:27,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 14:54:28,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:54:28,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 14:54:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 14:54:28,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 14:54:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:29,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479839784] [2022-03-20 14:54:29,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:29,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541945819] [2022-03-20 14:54:29,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541945819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:29,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:29,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 14:54:29,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:29,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [129884214] [2022-03-20 14:54:29,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [129884214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:29,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:29,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:54:29,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186258878] [2022-03-20 14:54:29,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:29,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:54:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:54:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:54:29,100 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 14:54:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:29,364 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-03-20 14:54:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:54:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-03-20 14:54:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:29,365 INFO L225 Difference]: With dead ends: 291 [2022-03-20 14:54:29,365 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 14:54:29,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:54:29,366 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:29,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 354 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:54:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 14:54:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-03-20 14:54:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 14:54:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-03-20 14:54:29,398 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-03-20 14:54:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:29,398 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-03-20 14:54:29,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 14:54:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-03-20 14:54:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 14:54:29,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:29,399 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:29,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:29,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 14:54:29,615 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-03-20 14:54:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99409605] [2022-03-20 14:54:29,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-03-20 14:54:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845705615] [2022-03-20 14:54:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:29,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57633486] [2022-03-20 14:54:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:54:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:29,645 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:29,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 14:54:29,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:54:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 14:54:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 14:54:30,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 14:54:30,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:30,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845705615] [2022-03-20 14:54:30,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:30,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57633486] [2022-03-20 14:54:30,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57633486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:30,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:30,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 14:54:30,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:30,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99409605] [2022-03-20 14:54:30,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99409605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:30,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:30,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:54:30,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944477782] [2022-03-20 14:54:30,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:30,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:54:30,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:54:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:54:30,574 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 14:54:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:31,746 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2022-03-20 14:54:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:54:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-03-20 14:54:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:31,748 INFO L225 Difference]: With dead ends: 310 [2022-03-20 14:54:31,749 INFO L226 Difference]: Without dead ends: 304 [2022-03-20 14:54:31,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:54:31,750 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:31,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 14:54:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-20 14:54:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2022-03-20 14:54:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 188 states have internal predecessors, (204), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 14:54:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2022-03-20 14:54:31,789 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 90 [2022-03-20 14:54:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:31,790 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2022-03-20 14:54:31,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 14:54:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2022-03-20 14:54:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 14:54:31,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:31,791 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:31,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:32,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:32,003 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-03-20 14:54:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098528604] [2022-03-20 14:54:32,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-03-20 14:54:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205997599] [2022-03-20 14:54:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:32,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:32,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195872506] [2022-03-20 14:54:32,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:54:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:32,012 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:32,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 14:54:32,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:54:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:54:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-20 14:54:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 14:54:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205997599] [2022-03-20 14:54:41,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195872506] [2022-03-20 14:54:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195872506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:41,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:41,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 14:54:41,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098528604] [2022-03-20 14:54:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098528604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:41,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:41,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:54:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690583690] [2022-03-20 14:54:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:41,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:54:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:54:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:54:41,013 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:54:43,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:54:45,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:54:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:47,207 INFO L93 Difference]: Finished difference Result 316 states and 378 transitions. [2022-03-20 14:54:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:54:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-03-20 14:54:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:47,209 INFO L225 Difference]: With dead ends: 316 [2022-03-20 14:54:47,209 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 14:54:47,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:54:47,210 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 18 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:47,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 300 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-03-20 14:54:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 14:54:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 298. [2022-03-20 14:54:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 190 states have (on average 1.1421052631578947) internal successors, (217), 198 states have internal predecessors, (217), 69 states have call successors, (69), 39 states have call predecessors, (69), 38 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 14:54:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 351 transitions. [2022-03-20 14:54:47,256 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 351 transitions. Word has length 90 [2022-03-20 14:54:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:47,256 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 351 transitions. [2022-03-20 14:54:47,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 14:54:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 351 transitions. [2022-03-20 14:54:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 14:54:47,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:47,257 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:47,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:47,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:47,488 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-03-20 14:54:47,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:47,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [408119377] [2022-03-20 14:54:47,489 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-03-20 14:54:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:47,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636862609] [2022-03-20 14:54:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:47,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:47,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343874186] [2022-03-20 14:54:47,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:54:47,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:47,516 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:47,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 14:54:47,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:54:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:54:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 14:54:47,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 14:54:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636862609] [2022-03-20 14:54:47,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343874186] [2022-03-20 14:54:47,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343874186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:47,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:47,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 14:54:47,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:47,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [408119377] [2022-03-20 14:54:47,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [408119377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:47,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:47,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:54:47,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468421669] [2022-03-20 14:54:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:47,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:54:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:54:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:54:47,903 INFO L87 Difference]: Start difference. First operand 298 states and 351 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 14:54:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:48,063 INFO L93 Difference]: Finished difference Result 403 states and 465 transitions. [2022-03-20 14:54:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:54:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-03-20 14:54:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:48,065 INFO L225 Difference]: With dead ends: 403 [2022-03-20 14:54:48,066 INFO L226 Difference]: Without dead ends: 378 [2022-03-20 14:54:48,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:54:48,066 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 20 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:48,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:54:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-20 14:54:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 368. [2022-03-20 14:54:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 241 states have (on average 1.1244813278008299) internal successors, (271), 248 states have internal predecessors, (271), 77 states have call successors, (77), 51 states have call predecessors, (77), 49 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 14:54:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 420 transitions. [2022-03-20 14:54:48,124 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 420 transitions. Word has length 99 [2022-03-20 14:54:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:48,124 INFO L478 AbstractCegarLoop]: Abstraction has 368 states and 420 transitions. [2022-03-20 14:54:48,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 14:54:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 420 transitions. [2022-03-20 14:54:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:54:48,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:48,127 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:48,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:48,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 14:54:48,345 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-03-20 14:54:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:48,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841522075] [2022-03-20 14:54:48,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-03-20 14:54:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:48,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295080324] [2022-03-20 14:54:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:48,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:48,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628770539] [2022-03-20 14:54:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:54:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:48,355 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:48,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 14:54:48,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:54:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 14:54:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 14:54:49,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-20 14:54:49,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295080324] [2022-03-20 14:54:49,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628770539] [2022-03-20 14:54:49,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628770539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:49,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:49,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-20 14:54:49,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841522075] [2022-03-20 14:54:49,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841522075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:49,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:49,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:54:49,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973890016] [2022-03-20 14:54:49,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:49,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:54:49,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:54:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:54:49,580 INFO L87 Difference]: Start difference. First operand 368 states and 420 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:54:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:50,461 INFO L93 Difference]: Finished difference Result 395 states and 459 transitions. [2022-03-20 14:54:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:54:50,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 14:54:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:50,464 INFO L225 Difference]: With dead ends: 395 [2022-03-20 14:54:50,464 INFO L226 Difference]: Without dead ends: 393 [2022-03-20 14:54:50,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:54:50,465 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:50,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 457 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 14:54:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-20 14:54:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 377. [2022-03-20 14:54:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 246 states have (on average 1.1260162601626016) internal successors, (277), 253 states have internal predecessors, (277), 80 states have call successors, (80), 52 states have call predecessors, (80), 50 states have return successors, (75), 71 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 14:54:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 432 transitions. [2022-03-20 14:54:50,557 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 432 transitions. Word has length 104 [2022-03-20 14:54:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:50,557 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 432 transitions. [2022-03-20 14:54:50,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:54:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 432 transitions. [2022-03-20 14:54:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:54:50,558 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:50,559 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:50,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:50,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 14:54:50,776 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-03-20 14:54:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042686362] [2022-03-20 14:54:50,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-03-20 14:54:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:50,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977648840] [2022-03-20 14:54:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:50,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:50,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180305510] [2022-03-20 14:54:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:54:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:50,784 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 14:54:50,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:54:50,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 14:54:50,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 14:54:51,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 14:54:53,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:53,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977648840] [2022-03-20 14:54:53,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:53,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180305510] [2022-03-20 14:54:53,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180305510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:53,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:53,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 14:54:53,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042686362] [2022-03-20 14:54:53,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042686362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:53,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:53,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:54:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069036474] [2022-03-20 14:54:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:53,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:54:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:54:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:54:53,013 INFO L87 Difference]: Start difference. First operand 377 states and 432 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:54:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:53,372 INFO L93 Difference]: Finished difference Result 425 states and 493 transitions. [2022-03-20 14:54:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 14:54:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-20 14:54:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:53,375 INFO L225 Difference]: With dead ends: 425 [2022-03-20 14:54:53,375 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 14:54:53,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:54:53,376 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:53,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 494 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:54:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 14:54:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 407. [2022-03-20 14:54:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 266 states have (on average 1.1240601503759398) internal successors, (299), 273 states have internal predecessors, (299), 86 states have call successors, (86), 56 states have call predecessors, (86), 54 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-20 14:54:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 466 transitions. [2022-03-20 14:54:53,439 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 466 transitions. Word has length 104 [2022-03-20 14:54:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:53,439 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 466 transitions. [2022-03-20 14:54:53,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:54:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 466 transitions. [2022-03-20 14:54:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:54:53,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:53,440 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:53,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:53,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 14:54:53,655 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-03-20 14:54:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237633752] [2022-03-20 14:54:53,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-03-20 14:54:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:53,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894505627] [2022-03-20 14:54:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:53,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822285712] [2022-03-20 14:54:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:54:53,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:53,663 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:53,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 14:54:53,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:54:53,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 14:54:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 14:54:54,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 14:54:54,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894505627] [2022-03-20 14:54:54,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822285712] [2022-03-20 14:54:54,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822285712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:54:54,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:54:54,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 14:54:54,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:54,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237633752] [2022-03-20 14:54:54,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237633752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:54,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:54,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:54:54,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737241240] [2022-03-20 14:54:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:54,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:54:54,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:54:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:54:54,806 INFO L87 Difference]: Start difference. First operand 407 states and 466 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:54:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:54:55,628 INFO L93 Difference]: Finished difference Result 459 states and 530 transitions. [2022-03-20 14:54:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:54:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-20 14:54:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:54:55,630 INFO L225 Difference]: With dead ends: 459 [2022-03-20 14:54:55,630 INFO L226 Difference]: Without dead ends: 457 [2022-03-20 14:54:55,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:54:55,635 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:54:55,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 422 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:54:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-20 14:54:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 411. [2022-03-20 14:54:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 269 states have (on average 1.1226765799256506) internal successors, (302), 276 states have internal predecessors, (302), 86 states have call successors, (86), 57 states have call predecessors, (86), 55 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-20 14:54:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 469 transitions. [2022-03-20 14:54:55,705 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 469 transitions. Word has length 104 [2022-03-20 14:54:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:54:55,706 INFO L478 AbstractCegarLoop]: Abstraction has 411 states and 469 transitions. [2022-03-20 14:54:55,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 14:54:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 469 transitions. [2022-03-20 14:54:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:54:55,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:54:55,707 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:54:55,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 14:54:55,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 14:54:55,924 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:54:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:54:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-03-20 14:54:55,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27815356] [2022-03-20 14:54:55,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:54:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-03-20 14:54:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:54:55,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071206358] [2022-03-20 14:54:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:54:55,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:54:55,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:54:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856242557] [2022-03-20 14:54:55,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:54:55,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:54:55,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:54:55,952 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:54:55,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 14:54:56,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 14:54:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:54:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 14:54:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:54:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 14:54:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:54:59,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:54:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071206358] [2022-03-20 14:54:59,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:54:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856242557] [2022-03-20 14:54:59,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856242557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:54:59,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:54:59,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 14:54:59,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:54:59,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27815356] [2022-03-20 14:54:59,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27815356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:54:59,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:54:59,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:54:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655307233] [2022-03-20 14:54:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:54:59,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:54:59,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:54:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:54:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:54:59,885 INFO L87 Difference]: Start difference. First operand 411 states and 469 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:55:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:04,746 INFO L93 Difference]: Finished difference Result 507 states and 609 transitions. [2022-03-20 14:55:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:55:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-03-20 14:55:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:04,749 INFO L225 Difference]: With dead ends: 507 [2022-03-20 14:55:04,749 INFO L226 Difference]: Without dead ends: 501 [2022-03-20 14:55:04,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:55:04,750 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 41 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:04,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 618 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 14:55:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-20 14:55:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 469. [2022-03-20 14:55:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 305 states have (on average 1.1344262295081968) internal successors, (346), 314 states have internal predecessors, (346), 103 states have call successors, (103), 62 states have call predecessors, (103), 60 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 14:55:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 547 transitions. [2022-03-20 14:55:04,839 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 547 transitions. Word has length 104 [2022-03-20 14:55:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:04,839 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 547 transitions. [2022-03-20 14:55:04,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 14:55:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 547 transitions. [2022-03-20 14:55:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:55:04,840 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:04,840 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:04,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 14:55:05,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:05,045 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-03-20 14:55:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:05,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220330855] [2022-03-20 14:55:05,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-03-20 14:55:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152013295] [2022-03-20 14:55:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:05,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787195917] [2022-03-20 14:55:05,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:05,065 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 14:55:05,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:05,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 14:55:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 14:55:06,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-20 14:55:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152013295] [2022-03-20 14:55:06,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787195917] [2022-03-20 14:55:06,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787195917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:06,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:06,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 14:55:06,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220330855] [2022-03-20 14:55:06,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220330855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:06,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:06,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:55:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598411480] [2022-03-20 14:55:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:06,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:55:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:55:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:55:06,802 INFO L87 Difference]: Start difference. First operand 469 states and 547 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:55:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:07,587 INFO L93 Difference]: Finished difference Result 498 states and 588 transitions. [2022-03-20 14:55:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:55:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 14:55:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:07,589 INFO L225 Difference]: With dead ends: 498 [2022-03-20 14:55:07,589 INFO L226 Difference]: Without dead ends: 496 [2022-03-20 14:55:07,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:55:07,590 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:07,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 461 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:55:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-20 14:55:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-03-20 14:55:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 305 states have (on average 1.1344262295081968) internal successors, (346), 314 states have internal predecessors, (346), 103 states have call successors, (103), 62 states have call predecessors, (103), 60 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 14:55:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 547 transitions. [2022-03-20 14:55:07,697 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 547 transitions. Word has length 104 [2022-03-20 14:55:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:07,698 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 547 transitions. [2022-03-20 14:55:07,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:55:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 547 transitions. [2022-03-20 14:55:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:55:07,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:07,699 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:07,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:07,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:07,916 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-03-20 14:55:07,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:07,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746855809] [2022-03-20 14:55:07,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-03-20 14:55:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:07,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774292405] [2022-03-20 14:55:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:07,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:07,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24278812] [2022-03-20 14:55:07,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:07,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:07,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:07,925 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:07,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 14:55:07,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:07,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 14:55:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 14:55:10,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 113 proven. 32 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 14:55:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774292405] [2022-03-20 14:55:11,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24278812] [2022-03-20 14:55:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24278812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:11,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-20 14:55:11,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746855809] [2022-03-20 14:55:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746855809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:11,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:55:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494767652] [2022-03-20 14:55:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:11,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:55:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:55:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:55:11,140 INFO L87 Difference]: Start difference. First operand 469 states and 547 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:55:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:14,864 INFO L93 Difference]: Finished difference Result 497 states and 584 transitions. [2022-03-20 14:55:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:55:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-20 14:55:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:14,867 INFO L225 Difference]: With dead ends: 497 [2022-03-20 14:55:14,867 INFO L226 Difference]: Without dead ends: 481 [2022-03-20 14:55:14,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:55:14,868 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:14,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 413 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 14:55:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-20 14:55:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 457. [2022-03-20 14:55:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 298 states have (on average 1.1342281879194631) internal successors, (338), 307 states have internal predecessors, (338), 99 states have call successors, (99), 60 states have call predecessors, (99), 59 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-20 14:55:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 532 transitions. [2022-03-20 14:55:14,972 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 532 transitions. Word has length 104 [2022-03-20 14:55:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:14,973 INFO L478 AbstractCegarLoop]: Abstraction has 457 states and 532 transitions. [2022-03-20 14:55:14,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 14:55:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 532 transitions. [2022-03-20 14:55:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 14:55:14,974 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:14,974 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:15,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:15,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 14:55:15,187 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-03-20 14:55:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:15,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054701096] [2022-03-20 14:55:15,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-03-20 14:55:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:15,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126387227] [2022-03-20 14:55:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:15,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:15,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124570030] [2022-03-20 14:55:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:15,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:15,202 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:15,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 14:55:15,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:15,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 14:55:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 14:55:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-03-20 14:55:21,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126387227] [2022-03-20 14:55:21,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124570030] [2022-03-20 14:55:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124570030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:21,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:21,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-20 14:55:21,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054701096] [2022-03-20 14:55:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054701096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:21,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:21,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:55:21,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373866916] [2022-03-20 14:55:21,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:21,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:55:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:55:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=248, Unknown=1, NotChecked=0, Total=306 [2022-03-20 14:55:21,942 INFO L87 Difference]: Start difference. First operand 457 states and 532 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 14:55:24,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:55:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:25,042 INFO L93 Difference]: Finished difference Result 536 states and 643 transitions. [2022-03-20 14:55:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:55:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-03-20 14:55:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:25,045 INFO L225 Difference]: With dead ends: 536 [2022-03-20 14:55:25,045 INFO L226 Difference]: Without dead ends: 534 [2022-03-20 14:55:25,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=74, Invalid=345, Unknown=1, NotChecked=0, Total=420 [2022-03-20 14:55:25,046 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:25,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 317 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 407 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 14:55:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-20 14:55:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 480. [2022-03-20 14:55:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 311 states have (on average 1.1318327974276527) internal successors, (352), 323 states have internal predecessors, (352), 106 states have call successors, (106), 63 states have call predecessors, (106), 62 states have return successors, (102), 93 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 14:55:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 560 transitions. [2022-03-20 14:55:25,155 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 560 transitions. Word has length 104 [2022-03-20 14:55:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:25,156 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 560 transitions. [2022-03-20 14:55:25,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 14:55:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 560 transitions. [2022-03-20 14:55:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 14:55:25,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:25,157 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:25,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:25,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:25,363 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-03-20 14:55:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243745963] [2022-03-20 14:55:25,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-03-20 14:55:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103146289] [2022-03-20 14:55:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:25,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:25,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999806506] [2022-03-20 14:55:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:25,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:25,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:25,371 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:25,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 14:55:25,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:55:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 14:55:25,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 14:55:26,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103146289] [2022-03-20 14:55:26,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999806506] [2022-03-20 14:55:26,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999806506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:26,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 14:55:26,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243745963] [2022-03-20 14:55:26,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243745963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:26,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:55:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822624527] [2022-03-20 14:55:26,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:26,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:55:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:55:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:55:26,194 INFO L87 Difference]: Start difference. First operand 480 states and 560 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:55:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:26,510 INFO L93 Difference]: Finished difference Result 506 states and 601 transitions. [2022-03-20 14:55:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:55:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-20 14:55:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:26,513 INFO L225 Difference]: With dead ends: 506 [2022-03-20 14:55:26,513 INFO L226 Difference]: Without dead ends: 500 [2022-03-20 14:55:26,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:55:26,514 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:26,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 424 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-03-20 14:55:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 474. [2022-03-20 14:55:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 308 states have (on average 1.1331168831168832) internal successors, (349), 319 states have internal predecessors, (349), 104 states have call successors, (104), 62 states have call predecessors, (104), 61 states have return successors, (100), 92 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 14:55:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 553 transitions. [2022-03-20 14:55:26,623 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 553 transitions. Word has length 109 [2022-03-20 14:55:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:26,624 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 553 transitions. [2022-03-20 14:55:26,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:55:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 553 transitions. [2022-03-20 14:55:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 14:55:26,625 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:26,625 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:26,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:26,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:26,838 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:26,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-03-20 14:55:26,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:26,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131956907] [2022-03-20 14:55:26,838 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:26,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-03-20 14:55:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:26,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399565195] [2022-03-20 14:55:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:26,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377739036] [2022-03-20 14:55:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:26,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:26,846 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:26,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 14:55:26,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:55:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-20 14:55:27,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 34 proven. 95 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-20 14:55:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399565195] [2022-03-20 14:55:30,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377739036] [2022-03-20 14:55:30,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377739036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:30,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:30,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-20 14:55:30,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131956907] [2022-03-20 14:55:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131956907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:30,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:30,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:55:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568289538] [2022-03-20 14:55:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:30,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:55:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:55:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:55:30,420 INFO L87 Difference]: Start difference. First operand 474 states and 553 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:55:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:31,764 INFO L93 Difference]: Finished difference Result 510 states and 603 transitions. [2022-03-20 14:55:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:55:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-20 14:55:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:31,782 INFO L225 Difference]: With dead ends: 510 [2022-03-20 14:55:31,782 INFO L226 Difference]: Without dead ends: 504 [2022-03-20 14:55:31,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:55:31,783 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:31,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 375 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 14:55:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-20 14:55:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 484. [2022-03-20 14:55:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 316 states have (on average 1.1329113924050633) internal successors, (358), 326 states have internal predecessors, (358), 104 states have call successors, (104), 64 states have call predecessors, (104), 63 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 14:55:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 562 transitions. [2022-03-20 14:55:31,911 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 562 transitions. Word has length 109 [2022-03-20 14:55:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:31,912 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 562 transitions. [2022-03-20 14:55:31,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 14:55:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 562 transitions. [2022-03-20 14:55:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 14:55:31,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:31,913 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:31,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:32,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 14:55:32,119 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-03-20 14:55:32,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973433691] [2022-03-20 14:55:32,119 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-03-20 14:55:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347035503] [2022-03-20 14:55:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:32,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:32,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506936539] [2022-03-20 14:55:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:32,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:32,128 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:32,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 14:55:32,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:55:32,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:32,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:55:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-20 14:55:33,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-20 14:55:33,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:33,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347035503] [2022-03-20 14:55:33,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:33,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506936539] [2022-03-20 14:55:33,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506936539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:33,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:33,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 14:55:33,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:33,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973433691] [2022-03-20 14:55:33,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973433691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:33,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:33,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:55:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374863988] [2022-03-20 14:55:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:33,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:55:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:55:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:55:33,410 INFO L87 Difference]: Start difference. First operand 484 states and 562 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:55:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:33,709 INFO L93 Difference]: Finished difference Result 494 states and 570 transitions. [2022-03-20 14:55:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:55:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-03-20 14:55:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:33,712 INFO L225 Difference]: With dead ends: 494 [2022-03-20 14:55:33,712 INFO L226 Difference]: Without dead ends: 473 [2022-03-20 14:55:33,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:55:33,713 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:33,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 148 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-03-20 14:55:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 468. [2022-03-20 14:55:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 312 states have (on average 1.1217948717948718) internal successors, (350), 319 states have internal predecessors, (350), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (90), 85 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-20 14:55:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 533 transitions. [2022-03-20 14:55:33,839 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 533 transitions. Word has length 109 [2022-03-20 14:55:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:33,840 INFO L478 AbstractCegarLoop]: Abstraction has 468 states and 533 transitions. [2022-03-20 14:55:33,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 14:55:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 533 transitions. [2022-03-20 14:55:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 14:55:33,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:33,841 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:33,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:34,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 14:55:34,048 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-03-20 14:55:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197039492] [2022-03-20 14:55:34,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-03-20 14:55:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:34,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012052054] [2022-03-20 14:55:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:34,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:34,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925089803] [2022-03-20 14:55:34,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:34,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:34,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:34,058 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:34,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 14:55:34,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:55:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 14:55:34,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 14:55:34,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012052054] [2022-03-20 14:55:34,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925089803] [2022-03-20 14:55:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925089803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:34,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:34,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 14:55:34,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197039492] [2022-03-20 14:55:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197039492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:34,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:34,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:55:34,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765707179] [2022-03-20 14:55:34,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:34,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:55:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:55:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:55:34,552 INFO L87 Difference]: Start difference. First operand 468 states and 533 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 14:55:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:34,826 INFO L93 Difference]: Finished difference Result 583 states and 668 transitions. [2022-03-20 14:55:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:55:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-03-20 14:55:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:34,841 INFO L225 Difference]: With dead ends: 583 [2022-03-20 14:55:34,841 INFO L226 Difference]: Without dead ends: 574 [2022-03-20 14:55:34,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:55:34,842 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:34,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 162 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-20 14:55:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 561. [2022-03-20 14:55:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 377 states have (on average 1.1087533156498675) internal successors, (418), 385 states have internal predecessors, (418), 108 states have call successors, (108), 76 states have call predecessors, (108), 75 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2022-03-20 14:55:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 631 transitions. [2022-03-20 14:55:35,056 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 631 transitions. Word has length 118 [2022-03-20 14:55:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:35,056 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 631 transitions. [2022-03-20 14:55:35,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 14:55:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 631 transitions. [2022-03-20 14:55:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 14:55:35,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:35,058 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:35,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:35,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 14:55:35,271 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-03-20 14:55:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479642175] [2022-03-20 14:55:35,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-03-20 14:55:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527413145] [2022-03-20 14:55:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:35,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772417027] [2022-03-20 14:55:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:35,281 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:35,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 14:55:35,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 14:55:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:55:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 14:55:35,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 14:55:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527413145] [2022-03-20 14:55:35,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772417027] [2022-03-20 14:55:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772417027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:35,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:35,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 14:55:35,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:35,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479642175] [2022-03-20 14:55:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479642175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:35,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:35,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:55:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680779878] [2022-03-20 14:55:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:35,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:55:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:55:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:55:35,723 INFO L87 Difference]: Start difference. First operand 561 states and 631 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 14:55:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:35,995 INFO L93 Difference]: Finished difference Result 690 states and 792 transitions. [2022-03-20 14:55:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:55:35,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-03-20 14:55:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:35,998 INFO L225 Difference]: With dead ends: 690 [2022-03-20 14:55:35,998 INFO L226 Difference]: Without dead ends: 681 [2022-03-20 14:55:35,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:55:35,998 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:35,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 184 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-20 14:55:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2022-03-20 14:55:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 453 states have (on average 1.1059602649006623) internal successors, (501), 464 states have internal predecessors, (501), 136 states have call successors, (136), 90 states have call predecessors, (136), 89 states have return successors, (133), 124 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-20 14:55:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 770 transitions. [2022-03-20 14:55:36,201 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 770 transitions. Word has length 137 [2022-03-20 14:55:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:36,201 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 770 transitions. [2022-03-20 14:55:36,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 14:55:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 770 transitions. [2022-03-20 14:55:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 14:55:36,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:36,203 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:36,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:36,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:36,420 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-03-20 14:55:36,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:36,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583300668] [2022-03-20 14:55:36,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-03-20 14:55:36,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:36,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242226226] [2022-03-20 14:55:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:36,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:36,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:36,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835701434] [2022-03-20 14:55:36,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:36,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:36,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:36,428 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:36,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 14:55:36,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:55:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 14:55:36,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 14:55:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:37,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242226226] [2022-03-20 14:55:37,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:37,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835701434] [2022-03-20 14:55:37,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835701434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:37,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 14:55:37,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:37,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583300668] [2022-03-20 14:55:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583300668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:37,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:55:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059576017] [2022-03-20 14:55:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:37,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:55:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:55:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:55:37,021 INFO L87 Difference]: Start difference. First operand 679 states and 770 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 14:55:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:37,357 INFO L93 Difference]: Finished difference Result 808 states and 931 transitions. [2022-03-20 14:55:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:55:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-03-20 14:55:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:37,360 INFO L225 Difference]: With dead ends: 808 [2022-03-20 14:55:37,360 INFO L226 Difference]: Without dead ends: 799 [2022-03-20 14:55:37,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 14:55:37,361 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:37,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 186 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-20 14:55:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 797. [2022-03-20 14:55:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 529 states have (on average 1.1039697542533082) internal successors, (584), 543 states have internal predecessors, (584), 164 states have call successors, (164), 104 states have call predecessors, (164), 103 states have return successors, (161), 149 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-20 14:55:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 909 transitions. [2022-03-20 14:55:37,575 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 909 transitions. Word has length 156 [2022-03-20 14:55:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:37,575 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 909 transitions. [2022-03-20 14:55:37,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-20 14:55:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 909 transitions. [2022-03-20 14:55:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 14:55:37,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:37,577 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:37,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 14:55:37,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 14:55:37,794 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-03-20 14:55:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:37,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256703412] [2022-03-20 14:55:37,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-03-20 14:55:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:37,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025805176] [2022-03-20 14:55:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:37,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:37,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:37,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321455907] [2022-03-20 14:55:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:37,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:37,805 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:37,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 14:55:37,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:55:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 14:55:38,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-20 14:55:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:38,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025805176] [2022-03-20 14:55:38,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:38,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321455907] [2022-03-20 14:55:38,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321455907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:38,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:38,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 14:55:38,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256703412] [2022-03-20 14:55:38,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256703412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:38,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:38,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:55:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065810248] [2022-03-20 14:55:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:38,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:55:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:55:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:55:38,235 INFO L87 Difference]: Start difference. First operand 797 states and 909 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-20 14:55:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:38,592 INFO L93 Difference]: Finished difference Result 926 states and 1070 transitions. [2022-03-20 14:55:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 14:55:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-03-20 14:55:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:38,596 INFO L225 Difference]: With dead ends: 926 [2022-03-20 14:55:38,596 INFO L226 Difference]: Without dead ends: 917 [2022-03-20 14:55:38,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:55:38,597 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:38,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 208 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-20 14:55:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 915. [2022-03-20 14:55:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 605 states have (on average 1.1024793388429752) internal successors, (667), 622 states have internal predecessors, (667), 192 states have call successors, (192), 118 states have call predecessors, (192), 117 states have return successors, (189), 174 states have call predecessors, (189), 189 states have call successors, (189) [2022-03-20 14:55:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1048 transitions. [2022-03-20 14:55:38,838 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1048 transitions. Word has length 175 [2022-03-20 14:55:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:38,838 INFO L478 AbstractCegarLoop]: Abstraction has 915 states and 1048 transitions. [2022-03-20 14:55:38,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-20 14:55:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1048 transitions. [2022-03-20 14:55:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 14:55:38,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:38,841 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:38,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 14:55:39,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 14:55:39,077 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-03-20 14:55:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020175345] [2022-03-20 14:55:39,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-03-20 14:55:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586955989] [2022-03-20 14:55:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:39,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542236122] [2022-03-20 14:55:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:39,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:39,086 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:39,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 14:55:39,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 14:55:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 14:55:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 14:55:39,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-20 14:55:39,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586955989] [2022-03-20 14:55:39,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542236122] [2022-03-20 14:55:39,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542236122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:39,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:39,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 14:55:39,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020175345] [2022-03-20 14:55:39,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020175345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:39,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:39,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:55:39,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923134887] [2022-03-20 14:55:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:39,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:55:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:55:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:55:39,852 INFO L87 Difference]: Start difference. First operand 915 states and 1048 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 14:55:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:40,286 INFO L93 Difference]: Finished difference Result 1044 states and 1209 transitions. [2022-03-20 14:55:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 14:55:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-03-20 14:55:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:40,290 INFO L225 Difference]: With dead ends: 1044 [2022-03-20 14:55:40,290 INFO L226 Difference]: Without dead ends: 1035 [2022-03-20 14:55:40,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 14:55:40,291 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 43 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:40,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 210 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-20 14:55:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1033. [2022-03-20 14:55:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 681 states have (on average 1.1013215859030836) internal successors, (750), 701 states have internal predecessors, (750), 220 states have call successors, (220), 132 states have call predecessors, (220), 131 states have return successors, (217), 199 states have call predecessors, (217), 217 states have call successors, (217) [2022-03-20 14:55:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1187 transitions. [2022-03-20 14:55:40,570 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1187 transitions. Word has length 194 [2022-03-20 14:55:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:40,570 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1187 transitions. [2022-03-20 14:55:40,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 14:55:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1187 transitions. [2022-03-20 14:55:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 14:55:40,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:40,574 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:40,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:40,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:40,780 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-03-20 14:55:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287959516] [2022-03-20 14:55:40,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-03-20 14:55:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319517612] [2022-03-20 14:55:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:40,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322057294] [2022-03-20 14:55:40,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:40,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:40,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:40,789 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:40,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 14:55:40,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:40,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 14:55:40,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 14:55:41,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-20 14:55:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319517612] [2022-03-20 14:55:41,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322057294] [2022-03-20 14:55:41,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322057294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:41,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:41,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 14:55:41,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287959516] [2022-03-20 14:55:41,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287959516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:41,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:41,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:55:41,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623627417] [2022-03-20 14:55:41,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:41,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:55:41,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:41,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:55:41,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:55:41,532 INFO L87 Difference]: Start difference. First operand 1033 states and 1187 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-20 14:55:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:42,073 INFO L93 Difference]: Finished difference Result 1162 states and 1348 transitions. [2022-03-20 14:55:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 14:55:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 213 [2022-03-20 14:55:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:42,091 INFO L225 Difference]: With dead ends: 1162 [2022-03-20 14:55:42,091 INFO L226 Difference]: Without dead ends: 1153 [2022-03-20 14:55:42,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 14:55:42,092 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:42,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 212 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-03-20 14:55:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2022-03-20 14:55:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 757 states have (on average 1.1003963011889035) internal successors, (833), 780 states have internal predecessors, (833), 248 states have call successors, (248), 146 states have call predecessors, (248), 145 states have return successors, (245), 224 states have call predecessors, (245), 245 states have call successors, (245) [2022-03-20 14:55:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1326 transitions. [2022-03-20 14:55:42,422 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1326 transitions. Word has length 213 [2022-03-20 14:55:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:42,422 INFO L478 AbstractCegarLoop]: Abstraction has 1151 states and 1326 transitions. [2022-03-20 14:55:42,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-20 14:55:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1326 transitions. [2022-03-20 14:55:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-20 14:55:42,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:42,445 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:42,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:42,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 14:55:42,646 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 21 times [2022-03-20 14:55:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:42,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831472832] [2022-03-20 14:55:42,647 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 22 times [2022-03-20 14:55:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:42,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011313136] [2022-03-20 14:55:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:42,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:42,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134247023] [2022-03-20 14:55:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:42,654 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:42,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 14:55:42,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:55:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 2387 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 14:55:43,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 407 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-20 14:55:43,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011313136] [2022-03-20 14:55:43,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134247023] [2022-03-20 14:55:43,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134247023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:43,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:43,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 14:55:43,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831472832] [2022-03-20 14:55:43,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831472832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:43,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:43,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 14:55:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224439501] [2022-03-20 14:55:43,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:43,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 14:55:43,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 14:55:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:55:43,469 INFO L87 Difference]: Start difference. First operand 1151 states and 1326 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-20 14:55:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:43,993 INFO L93 Difference]: Finished difference Result 1280 states and 1487 transitions. [2022-03-20 14:55:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 14:55:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 232 [2022-03-20 14:55:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:43,998 INFO L225 Difference]: With dead ends: 1280 [2022-03-20 14:55:43,998 INFO L226 Difference]: Without dead ends: 1271 [2022-03-20 14:55:43,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 14:55:43,999 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:43,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 264 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-03-20 14:55:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1269. [2022-03-20 14:55:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 833 states have (on average 1.099639855942377) internal successors, (916), 859 states have internal predecessors, (916), 276 states have call successors, (276), 160 states have call predecessors, (276), 159 states have return successors, (273), 249 states have call predecessors, (273), 273 states have call successors, (273) [2022-03-20 14:55:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1465 transitions. [2022-03-20 14:55:44,345 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1465 transitions. Word has length 232 [2022-03-20 14:55:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:44,346 INFO L478 AbstractCegarLoop]: Abstraction has 1269 states and 1465 transitions. [2022-03-20 14:55:44,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-20 14:55:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1465 transitions. [2022-03-20 14:55:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-20 14:55:44,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:44,349 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:44,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:44,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:44,557 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 23 times [2022-03-20 14:55:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:44,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581562524] [2022-03-20 14:55:44,558 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 24 times [2022-03-20 14:55:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:44,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704557129] [2022-03-20 14:55:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:44,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397210003] [2022-03-20 14:55:44,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:44,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:44,577 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:44,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 14:55:44,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 14:55:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:44,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 14:55:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 2862 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 14:55:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 486 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-20 14:55:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704557129] [2022-03-20 14:55:45,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:45,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397210003] [2022-03-20 14:55:45,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397210003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:45,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:45,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 14:55:45,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:45,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581562524] [2022-03-20 14:55:45,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581562524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:45,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:45,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:55:45,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041117500] [2022-03-20 14:55:45,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:45,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:55:45,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:55:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:55:45,722 INFO L87 Difference]: Start difference. First operand 1269 states and 1465 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-20 14:55:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:46,290 INFO L93 Difference]: Finished difference Result 1398 states and 1626 transitions. [2022-03-20 14:55:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:55:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) Word has length 251 [2022-03-20 14:55:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:46,295 INFO L225 Difference]: With dead ends: 1398 [2022-03-20 14:55:46,295 INFO L226 Difference]: Without dead ends: 1389 [2022-03-20 14:55:46,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 14:55:46,296 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 33 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:46,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 256 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-03-20 14:55:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1387. [2022-03-20 14:55:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 909 states have (on average 1.099009900990099) internal successors, (999), 938 states have internal predecessors, (999), 304 states have call successors, (304), 174 states have call predecessors, (304), 173 states have return successors, (301), 274 states have call predecessors, (301), 301 states have call successors, (301) [2022-03-20 14:55:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1604 transitions. [2022-03-20 14:55:46,660 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1604 transitions. Word has length 251 [2022-03-20 14:55:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:46,660 INFO L478 AbstractCegarLoop]: Abstraction has 1387 states and 1604 transitions. [2022-03-20 14:55:46,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-20 14:55:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1604 transitions. [2022-03-20 14:55:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-03-20 14:55:46,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:46,664 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:46,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:46,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:46,879 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 25 times [2022-03-20 14:55:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:46,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076329196] [2022-03-20 14:55:46,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 26 times [2022-03-20 14:55:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95840816] [2022-03-20 14:55:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:46,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843836876] [2022-03-20 14:55:46,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:46,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:46,889 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:46,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 14:55:46,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 14:55:47,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 3380 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-20 14:55:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 572 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-20 14:55:48,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95840816] [2022-03-20 14:55:48,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843836876] [2022-03-20 14:55:48,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843836876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:48,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:48,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 14:55:48,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076329196] [2022-03-20 14:55:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076329196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:48,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:55:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005216580] [2022-03-20 14:55:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:48,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:55:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:55:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 14:55:48,104 INFO L87 Difference]: Start difference. First operand 1387 states and 1604 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-20 14:55:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:48,783 INFO L93 Difference]: Finished difference Result 1516 states and 1765 transitions. [2022-03-20 14:55:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 14:55:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) Word has length 270 [2022-03-20 14:55:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:48,788 INFO L225 Difference]: With dead ends: 1516 [2022-03-20 14:55:48,789 INFO L226 Difference]: Without dead ends: 1507 [2022-03-20 14:55:48,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 14:55:48,790 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 53 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:48,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 238 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-20 14:55:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2022-03-20 14:55:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 985 states have (on average 1.0984771573604062) internal successors, (1082), 1017 states have internal predecessors, (1082), 332 states have call successors, (332), 188 states have call predecessors, (332), 187 states have return successors, (329), 299 states have call predecessors, (329), 329 states have call successors, (329) [2022-03-20 14:55:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1743 transitions. [2022-03-20 14:55:49,206 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1743 transitions. Word has length 270 [2022-03-20 14:55:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:49,207 INFO L478 AbstractCegarLoop]: Abstraction has 1505 states and 1743 transitions. [2022-03-20 14:55:49,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-20 14:55:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1743 transitions. [2022-03-20 14:55:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-20 14:55:49,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:49,210 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:49,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:49,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 14:55:49,429 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 27 times [2022-03-20 14:55:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902673191] [2022-03-20 14:55:49,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 28 times [2022-03-20 14:55:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020021849] [2022-03-20 14:55:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:49,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:49,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124059849] [2022-03-20 14:55:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:49,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:49,440 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:49,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 14:55:49,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:49,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 14:55:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 3941 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 14:55:50,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 665 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-20 14:55:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020021849] [2022-03-20 14:55:50,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124059849] [2022-03-20 14:55:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124059849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:50,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:50,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 14:55:50,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902673191] [2022-03-20 14:55:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902673191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:50,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:50,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:55:50,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176804375] [2022-03-20 14:55:50,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:50,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:55:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:55:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 14:55:50,707 INFO L87 Difference]: Start difference. First operand 1505 states and 1743 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-20 14:55:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:51,379 INFO L93 Difference]: Finished difference Result 1634 states and 1904 transitions. [2022-03-20 14:55:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 14:55:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) Word has length 289 [2022-03-20 14:55:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:51,385 INFO L225 Difference]: With dead ends: 1634 [2022-03-20 14:55:51,386 INFO L226 Difference]: Without dead ends: 1625 [2022-03-20 14:55:51,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 14:55:51,387 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:51,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 260 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-03-20 14:55:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1623. [2022-03-20 14:55:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1061 states have (on average 1.0980207351555136) internal successors, (1165), 1096 states have internal predecessors, (1165), 360 states have call successors, (360), 202 states have call predecessors, (360), 201 states have return successors, (357), 324 states have call predecessors, (357), 357 states have call successors, (357) [2022-03-20 14:55:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 1882 transitions. [2022-03-20 14:55:51,803 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 1882 transitions. Word has length 289 [2022-03-20 14:55:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:51,804 INFO L478 AbstractCegarLoop]: Abstraction has 1623 states and 1882 transitions. [2022-03-20 14:55:51,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-20 14:55:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 1882 transitions. [2022-03-20 14:55:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-03-20 14:55:51,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:51,807 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:51,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:52,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 14:55:52,014 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 29 times [2022-03-20 14:55:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:52,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991130449] [2022-03-20 14:55:52,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:52,015 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 30 times [2022-03-20 14:55:52,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:52,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413672994] [2022-03-20 14:55:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:52,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:52,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966180298] [2022-03-20 14:55:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:55:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:52,030 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:52,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 14:55:52,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-20 14:55:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:55:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 4545 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 14:55:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 765 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-20 14:55:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413672994] [2022-03-20 14:55:53,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966180298] [2022-03-20 14:55:53,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966180298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:53,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:53,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 14:55:53,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991130449] [2022-03-20 14:55:53,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991130449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:53,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 14:55:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459838559] [2022-03-20 14:55:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:53,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 14:55:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 14:55:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 14:55:53,030 INFO L87 Difference]: Start difference. First operand 1623 states and 1882 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-20 14:55:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:53,744 INFO L93 Difference]: Finished difference Result 1752 states and 2043 transitions. [2022-03-20 14:55:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 14:55:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 308 [2022-03-20 14:55:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:53,750 INFO L225 Difference]: With dead ends: 1752 [2022-03-20 14:55:53,750 INFO L226 Difference]: Without dead ends: 1743 [2022-03-20 14:55:53,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 14:55:53,751 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 46 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:53,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 292 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:55:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-03-20 14:55:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1741. [2022-03-20 14:55:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1137 states have (on average 1.0976253298153034) internal successors, (1248), 1175 states have internal predecessors, (1248), 388 states have call successors, (388), 216 states have call predecessors, (388), 215 states have return successors, (385), 349 states have call predecessors, (385), 385 states have call successors, (385) [2022-03-20 14:55:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2021 transitions. [2022-03-20 14:55:54,235 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2021 transitions. Word has length 308 [2022-03-20 14:55:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:54,235 INFO L478 AbstractCegarLoop]: Abstraction has 1741 states and 2021 transitions. [2022-03-20 14:55:54,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-20 14:55:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2021 transitions. [2022-03-20 14:55:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-03-20 14:55:54,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:54,239 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:54,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:54,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 14:55:54,447 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 31 times [2022-03-20 14:55:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583820259] [2022-03-20 14:55:54,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 32 times [2022-03-20 14:55:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559946111] [2022-03-20 14:55:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:54,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:54,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728634066] [2022-03-20 14:55:54,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:55:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:54,462 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 14:55:54,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:55:54,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:55:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 5192 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 14:55:55,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 872 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-20 14:55:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559946111] [2022-03-20 14:55:55,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728634066] [2022-03-20 14:55:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728634066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:55,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:55,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 14:55:55,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583820259] [2022-03-20 14:55:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583820259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:55,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:55,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 14:55:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482209160] [2022-03-20 14:55:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:55,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 14:55:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 14:55:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 14:55:55,924 INFO L87 Difference]: Start difference. First operand 1741 states and 2021 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-20 14:55:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:56,699 INFO L93 Difference]: Finished difference Result 1870 states and 2182 transitions. [2022-03-20 14:55:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 14:55:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) Word has length 327 [2022-03-20 14:55:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:56,706 INFO L225 Difference]: With dead ends: 1870 [2022-03-20 14:55:56,706 INFO L226 Difference]: Without dead ends: 1861 [2022-03-20 14:55:56,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:55:56,707 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 66 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:56,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 294 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-03-20 14:55:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1859. [2022-03-20 14:55:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1213 states have (on average 1.0972794723825228) internal successors, (1331), 1254 states have internal predecessors, (1331), 416 states have call successors, (416), 230 states have call predecessors, (416), 229 states have return successors, (413), 374 states have call predecessors, (413), 413 states have call successors, (413) [2022-03-20 14:55:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2160 transitions. [2022-03-20 14:55:57,196 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2160 transitions. Word has length 327 [2022-03-20 14:55:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:55:57,197 INFO L478 AbstractCegarLoop]: Abstraction has 1859 states and 2160 transitions. [2022-03-20 14:55:57,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-20 14:55:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2160 transitions. [2022-03-20 14:55:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-03-20 14:55:57,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:55:57,201 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 51, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:55:57,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 14:55:57,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:57,419 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:55:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:55:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 33 times [2022-03-20 14:55:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:57,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147146642] [2022-03-20 14:55:57,419 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:55:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 34 times [2022-03-20 14:55:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:55:57,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61214275] [2022-03-20 14:55:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:55:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:55:57,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:55:57,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055827109] [2022-03-20 14:55:57,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:55:57,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:55:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:55:57,456 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:55:57,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 14:55:57,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:55:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:55:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 14:55:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:55:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 5882 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 14:55:58,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:55:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 986 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-03-20 14:55:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:55:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61214275] [2022-03-20 14:55:58,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:55:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055827109] [2022-03-20 14:55:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055827109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:55:58,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:55:58,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 14:55:58,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:55:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147146642] [2022-03-20 14:55:58,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147146642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:55:58,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:55:58,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 14:55:58,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342486213] [2022-03-20 14:55:58,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:55:58,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 14:55:58,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:55:58,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 14:55:58,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 14:55:58,983 INFO L87 Difference]: Start difference. First operand 1859 states and 2160 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-20 14:55:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:55:59,812 INFO L93 Difference]: Finished difference Result 1988 states and 2321 transitions. [2022-03-20 14:55:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 14:55:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 346 [2022-03-20 14:55:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:55:59,819 INFO L225 Difference]: With dead ends: 1988 [2022-03-20 14:55:59,819 INFO L226 Difference]: Without dead ends: 1979 [2022-03-20 14:55:59,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 14:55:59,820 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 53 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:55:59,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 336 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:55:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-03-20 14:56:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1977. [2022-03-20 14:56:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1289 states have (on average 1.0969743987587277) internal successors, (1414), 1333 states have internal predecessors, (1414), 444 states have call successors, (444), 244 states have call predecessors, (444), 243 states have return successors, (441), 399 states have call predecessors, (441), 441 states have call successors, (441) [2022-03-20 14:56:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2299 transitions. [2022-03-20 14:56:00,324 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2299 transitions. Word has length 346 [2022-03-20 14:56:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:00,324 INFO L478 AbstractCegarLoop]: Abstraction has 1977 states and 2299 transitions. [2022-03-20 14:56:00,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-20 14:56:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2299 transitions. [2022-03-20 14:56:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 14:56:00,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:00,328 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 54, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:00,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:00,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 14:56:00,546 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 35 times [2022-03-20 14:56:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097725938] [2022-03-20 14:56:00,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 36 times [2022-03-20 14:56:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075736561] [2022-03-20 14:56:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:00,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:00,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:00,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112009395] [2022-03-20 14:56:00,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:00,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:00,572 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:00,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 14:56:02,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-03-20 14:56:02,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:56:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 6615 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 14:56:03,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 1107 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-03-20 14:56:04,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075736561] [2022-03-20 14:56:04,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112009395] [2022-03-20 14:56:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112009395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:04,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:04,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 14:56:04,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097725938] [2022-03-20 14:56:04,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097725938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:04,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:04,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 14:56:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714087868] [2022-03-20 14:56:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:04,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 14:56:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 14:56:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 14:56:04,029 INFO L87 Difference]: Start difference. First operand 1977 states and 2299 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-20 14:56:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:04,840 INFO L93 Difference]: Finished difference Result 2106 states and 2460 transitions. [2022-03-20 14:56:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 14:56:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) Word has length 365 [2022-03-20 14:56:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:04,854 INFO L225 Difference]: With dead ends: 2106 [2022-03-20 14:56:04,854 INFO L226 Difference]: Without dead ends: 2097 [2022-03-20 14:56:04,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 14:56:04,856 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 57 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:04,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 348 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-03-20 14:56:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2095. [2022-03-20 14:56:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 1365 states have (on average 1.0967032967032968) internal successors, (1497), 1412 states have internal predecessors, (1497), 472 states have call successors, (472), 258 states have call predecessors, (472), 257 states have return successors, (469), 424 states have call predecessors, (469), 469 states have call successors, (469) [2022-03-20 14:56:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2438 transitions. [2022-03-20 14:56:05,402 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2438 transitions. Word has length 365 [2022-03-20 14:56:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:05,403 INFO L478 AbstractCegarLoop]: Abstraction has 2095 states and 2438 transitions. [2022-03-20 14:56:05,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-20 14:56:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2438 transitions. [2022-03-20 14:56:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-03-20 14:56:05,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:05,407 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 57, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:05,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:05,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 14:56:05,616 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 37 times [2022-03-20 14:56:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:05,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160521288] [2022-03-20 14:56:05,617 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 38 times [2022-03-20 14:56:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:05,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10210333] [2022-03-20 14:56:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:05,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150475030] [2022-03-20 14:56:05,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:56:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:05,626 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:05,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 14:56:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:56:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 14:56:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 7391 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 14:56:06,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 1235 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-03-20 14:56:07,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:07,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10210333] [2022-03-20 14:56:07,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:07,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150475030] [2022-03-20 14:56:07,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150475030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:07,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:07,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 14:56:07,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:07,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160521288] [2022-03-20 14:56:07,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160521288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:07,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:07,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 14:56:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241258347] [2022-03-20 14:56:07,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:07,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 14:56:07,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 14:56:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 14:56:07,017 INFO L87 Difference]: Start difference. First operand 2095 states and 2438 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-20 14:56:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:08,034 INFO L93 Difference]: Finished difference Result 2224 states and 2599 transitions. [2022-03-20 14:56:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 14:56:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) Word has length 384 [2022-03-20 14:56:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:08,041 INFO L225 Difference]: With dead ends: 2224 [2022-03-20 14:56:08,041 INFO L226 Difference]: Without dead ends: 2215 [2022-03-20 14:56:08,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 14:56:08,042 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 61 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:08,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 340 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-03-20 14:56:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2022-03-20 14:56:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1441 states have (on average 1.0964607911172797) internal successors, (1580), 1491 states have internal predecessors, (1580), 500 states have call successors, (500), 272 states have call predecessors, (500), 271 states have return successors, (497), 449 states have call predecessors, (497), 497 states have call successors, (497) [2022-03-20 14:56:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2577 transitions. [2022-03-20 14:56:08,627 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2577 transitions. Word has length 384 [2022-03-20 14:56:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:08,627 INFO L478 AbstractCegarLoop]: Abstraction has 2213 states and 2577 transitions. [2022-03-20 14:56:08,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-20 14:56:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2577 transitions. [2022-03-20 14:56:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-03-20 14:56:08,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:08,632 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:08,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:08,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:08,847 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 39 times [2022-03-20 14:56:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751650433] [2022-03-20 14:56:08,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 40 times [2022-03-20 14:56:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:08,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619202692] [2022-03-20 14:56:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:08,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:08,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:08,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500375892] [2022-03-20 14:56:08,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:08,860 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:08,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 14:56:08,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 14:56:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 8210 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 14:56:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 1370 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-03-20 14:56:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619202692] [2022-03-20 14:56:10,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500375892] [2022-03-20 14:56:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500375892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:10,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:10,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 14:56:10,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751650433] [2022-03-20 14:56:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751650433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:10,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:10,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 14:56:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704328685] [2022-03-20 14:56:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:10,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 14:56:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 14:56:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 14:56:10,747 INFO L87 Difference]: Start difference. First operand 2213 states and 2577 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-20 14:56:11,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:11,819 INFO L93 Difference]: Finished difference Result 2342 states and 2738 transitions. [2022-03-20 14:56:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 14:56:11,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) Word has length 403 [2022-03-20 14:56:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:11,830 INFO L225 Difference]: With dead ends: 2342 [2022-03-20 14:56:11,830 INFO L226 Difference]: Without dead ends: 2333 [2022-03-20 14:56:11,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 14:56:11,832 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 90 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:11,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 332 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-03-20 14:56:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2022-03-20 14:56:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1517 states have (on average 1.096242584047462) internal successors, (1663), 1570 states have internal predecessors, (1663), 528 states have call successors, (528), 286 states have call predecessors, (528), 285 states have return successors, (525), 474 states have call predecessors, (525), 525 states have call successors, (525) [2022-03-20 14:56:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 2716 transitions. [2022-03-20 14:56:12,448 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 2716 transitions. Word has length 403 [2022-03-20 14:56:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:12,448 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 2716 transitions. [2022-03-20 14:56:12,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-20 14:56:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 2716 transitions. [2022-03-20 14:56:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-03-20 14:56:12,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:12,454 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 63, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:12,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:12,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 14:56:12,661 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 41 times [2022-03-20 14:56:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:12,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971178958] [2022-03-20 14:56:12,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 42 times [2022-03-20 14:56:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:12,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748657825] [2022-03-20 14:56:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:12,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299200301] [2022-03-20 14:56:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:12,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:12,676 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:12,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 14:56:14,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-03-20 14:56:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:56:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 9072 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 14:56:15,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 1512 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-03-20 14:56:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748657825] [2022-03-20 14:56:16,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299200301] [2022-03-20 14:56:16,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299200301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:16,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:16,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 14:56:16,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971178958] [2022-03-20 14:56:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971178958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:16,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:16,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 14:56:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602659177] [2022-03-20 14:56:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:16,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 14:56:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 14:56:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 14:56:16,656 INFO L87 Difference]: Start difference. First operand 2331 states and 2716 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-20 14:56:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:17,770 INFO L93 Difference]: Finished difference Result 2460 states and 2877 transitions. [2022-03-20 14:56:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 14:56:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 422 [2022-03-20 14:56:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:17,775 INFO L225 Difference]: With dead ends: 2460 [2022-03-20 14:56:17,776 INFO L226 Difference]: Without dead ends: 2451 [2022-03-20 14:56:17,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 14:56:17,777 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 102 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:17,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 354 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-03-20 14:56:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2449. [2022-03-20 14:56:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 1593 states have (on average 1.0960451977401129) internal successors, (1746), 1649 states have internal predecessors, (1746), 556 states have call successors, (556), 300 states have call predecessors, (556), 299 states have return successors, (553), 499 states have call predecessors, (553), 553 states have call successors, (553) [2022-03-20 14:56:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 2855 transitions. [2022-03-20 14:56:18,421 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 2855 transitions. Word has length 422 [2022-03-20 14:56:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:18,421 INFO L478 AbstractCegarLoop]: Abstraction has 2449 states and 2855 transitions. [2022-03-20 14:56:18,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-20 14:56:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 2855 transitions. [2022-03-20 14:56:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-03-20 14:56:18,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:18,427 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:18,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 14:56:18,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:18,629 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 43 times [2022-03-20 14:56:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390757039] [2022-03-20 14:56:18,630 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 44 times [2022-03-20 14:56:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089779762] [2022-03-20 14:56:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:18,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208409257] [2022-03-20 14:56:18,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:56:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:18,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:18,639 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:18,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 14:56:18,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:56:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 14:56:18,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 14:56:19,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-20 14:56:20,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089779762] [2022-03-20 14:56:20,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208409257] [2022-03-20 14:56:20,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208409257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:20,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:20,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 14:56:20,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390757039] [2022-03-20 14:56:20,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390757039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:20,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:20,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 14:56:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773639152] [2022-03-20 14:56:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:20,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 14:56:20,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 14:56:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 14:56:20,167 INFO L87 Difference]: Start difference. First operand 2449 states and 2855 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-20 14:56:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:21,200 INFO L93 Difference]: Finished difference Result 2578 states and 3016 transitions. [2022-03-20 14:56:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 14:56:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) Word has length 441 [2022-03-20 14:56:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:21,205 INFO L225 Difference]: With dead ends: 2578 [2022-03-20 14:56:21,206 INFO L226 Difference]: Without dead ends: 2569 [2022-03-20 14:56:21,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 14:56:21,207 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 91 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:21,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 376 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-03-20 14:56:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2567. [2022-03-20 14:56:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 1669 states have (on average 1.0958657878969442) internal successors, (1829), 1728 states have internal predecessors, (1829), 584 states have call successors, (584), 314 states have call predecessors, (584), 313 states have return successors, (581), 524 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-20 14:56:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 2994 transitions. [2022-03-20 14:56:21,877 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 2994 transitions. Word has length 441 [2022-03-20 14:56:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:21,877 INFO L478 AbstractCegarLoop]: Abstraction has 2567 states and 2994 transitions. [2022-03-20 14:56:21,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-20 14:56:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 2994 transitions. [2022-03-20 14:56:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-03-20 14:56:21,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:21,884 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 69, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:21,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:22,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 14:56:22,103 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 45 times [2022-03-20 14:56:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105251116] [2022-03-20 14:56:22,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 46 times [2022-03-20 14:56:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97906877] [2022-03-20 14:56:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:22,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589327652] [2022-03-20 14:56:22,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:22,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:22,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:22,128 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:22,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 14:56:22,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:22,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 14:56:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 10925 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-20 14:56:22,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 1817 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-03-20 14:56:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97906877] [2022-03-20 14:56:23,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589327652] [2022-03-20 14:56:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589327652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:23,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-20 14:56:23,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105251116] [2022-03-20 14:56:23,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105251116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:23,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:23,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 14:56:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639963234] [2022-03-20 14:56:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:23,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 14:56:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 14:56:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 14:56:23,556 INFO L87 Difference]: Start difference. First operand 2567 states and 2994 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-20 14:56:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:24,661 INFO L93 Difference]: Finished difference Result 2696 states and 3155 transitions. [2022-03-20 14:56:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 14:56:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) Word has length 460 [2022-03-20 14:56:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:24,667 INFO L225 Difference]: With dead ends: 2696 [2022-03-20 14:56:24,668 INFO L226 Difference]: Without dead ends: 2687 [2022-03-20 14:56:24,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 14:56:24,669 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 69 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:24,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 408 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-03-20 14:56:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2685. [2022-03-20 14:56:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 1745 states have (on average 1.095702005730659) internal successors, (1912), 1807 states have internal predecessors, (1912), 612 states have call successors, (612), 328 states have call predecessors, (612), 327 states have return successors, (609), 549 states have call predecessors, (609), 609 states have call successors, (609) [2022-03-20 14:56:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3133 transitions. [2022-03-20 14:56:25,393 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3133 transitions. Word has length 460 [2022-03-20 14:56:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:25,393 INFO L478 AbstractCegarLoop]: Abstraction has 2685 states and 3133 transitions. [2022-03-20 14:56:25,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-20 14:56:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3133 transitions. [2022-03-20 14:56:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-03-20 14:56:25,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:25,401 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 72, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:25,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:25,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 14:56:25,611 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 47 times [2022-03-20 14:56:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636844323] [2022-03-20 14:56:25,618 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 48 times [2022-03-20 14:56:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:25,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684889140] [2022-03-20 14:56:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:25,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:25,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864561024] [2022-03-20 14:56:25,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:25,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:25,641 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:25,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 14:56:25,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-03-20 14:56:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 14:56:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 11916 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-20 14:56:26,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 1980 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-03-20 14:56:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684889140] [2022-03-20 14:56:27,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864561024] [2022-03-20 14:56:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864561024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:27,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:27,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-20 14:56:27,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636844323] [2022-03-20 14:56:27,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636844323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:27,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:27,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 14:56:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165409125] [2022-03-20 14:56:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:27,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 14:56:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 14:56:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:27,965 INFO L87 Difference]: Start difference. First operand 2685 states and 3133 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-20 14:56:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:29,109 INFO L93 Difference]: Finished difference Result 2814 states and 3294 transitions. [2022-03-20 14:56:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 14:56:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) Word has length 479 [2022-03-20 14:56:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:29,115 INFO L225 Difference]: With dead ends: 2814 [2022-03-20 14:56:29,115 INFO L226 Difference]: Without dead ends: 2805 [2022-03-20 14:56:29,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 14:56:29,120 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 82 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:29,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 410 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-03-20 14:56:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2803. [2022-03-20 14:56:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1821 states have (on average 1.0955518945634266) internal successors, (1995), 1886 states have internal predecessors, (1995), 640 states have call successors, (640), 342 states have call predecessors, (640), 341 states have return successors, (637), 574 states have call predecessors, (637), 637 states have call successors, (637) [2022-03-20 14:56:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3272 transitions. [2022-03-20 14:56:29,904 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3272 transitions. Word has length 479 [2022-03-20 14:56:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:29,905 INFO L478 AbstractCegarLoop]: Abstraction has 2803 states and 3272 transitions. [2022-03-20 14:56:29,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-20 14:56:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3272 transitions. [2022-03-20 14:56:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-20 14:56:29,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:29,912 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 75, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:29,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 14:56:30,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:30,131 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 49 times [2022-03-20 14:56:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954403407] [2022-03-20 14:56:30,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 50 times [2022-03-20 14:56:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:30,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131956562] [2022-03-20 14:56:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:30,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:30,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708074829] [2022-03-20 14:56:30,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:56:30,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:30,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:30,148 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:30,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 14:56:30,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:56:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 14:56:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 12950 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-20 14:56:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 2150 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-03-20 14:56:32,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131956562] [2022-03-20 14:56:32,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708074829] [2022-03-20 14:56:32,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708074829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:32,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:32,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2022-03-20 14:56:32,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:32,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954403407] [2022-03-20 14:56:32,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954403407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:32,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:32,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:56:32,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452148182] [2022-03-20 14:56:32,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:32,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:56:32,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:32,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:56:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:32,448 INFO L87 Difference]: Start difference. First operand 2803 states and 3272 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-20 14:56:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:33,645 INFO L93 Difference]: Finished difference Result 2932 states and 3433 transitions. [2022-03-20 14:56:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 14:56:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) Word has length 498 [2022-03-20 14:56:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:33,653 INFO L225 Difference]: With dead ends: 2932 [2022-03-20 14:56:33,653 INFO L226 Difference]: Without dead ends: 2923 [2022-03-20 14:56:33,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 942 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2656, Invalid=3506, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 14:56:33,654 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 99 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:33,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 402 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-03-20 14:56:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2921. [2022-03-20 14:56:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 1897 states have (on average 1.09541381128097) internal successors, (2078), 1965 states have internal predecessors, (2078), 668 states have call successors, (668), 356 states have call predecessors, (668), 355 states have return successors, (665), 599 states have call predecessors, (665), 665 states have call successors, (665) [2022-03-20 14:56:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 3411 transitions. [2022-03-20 14:56:34,463 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 3411 transitions. Word has length 498 [2022-03-20 14:56:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:34,463 INFO L478 AbstractCegarLoop]: Abstraction has 2921 states and 3411 transitions. [2022-03-20 14:56:34,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-20 14:56:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 3411 transitions. [2022-03-20 14:56:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-03-20 14:56:34,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:34,470 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 78, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:34,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 14:56:34,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:34,688 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 51 times [2022-03-20 14:56:34,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796543555] [2022-03-20 14:56:34,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 52 times [2022-03-20 14:56:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147047542] [2022-03-20 14:56:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:34,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066022265] [2022-03-20 14:56:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:34,715 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:34,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 14:56:34,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 14:56:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 14027 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 14:56:35,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 2327 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-03-20 14:56:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147047542] [2022-03-20 14:56:36,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066022265] [2022-03-20 14:56:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066022265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:36,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:36,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2022-03-20 14:56:36,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796543555] [2022-03-20 14:56:36,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796543555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:36,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:36,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 14:56:36,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644329681] [2022-03-20 14:56:36,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:36,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 14:56:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:36,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 14:56:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:36,497 INFO L87 Difference]: Start difference. First operand 2921 states and 3411 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-20 14:56:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:37,734 INFO L93 Difference]: Finished difference Result 3050 states and 3572 transitions. [2022-03-20 14:56:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 14:56:37,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) Word has length 517 [2022-03-20 14:56:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:37,742 INFO L225 Difference]: With dead ends: 3050 [2022-03-20 14:56:37,743 INFO L226 Difference]: Without dead ends: 3041 [2022-03-20 14:56:37,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2709, Invalid=3611, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 14:56:37,744 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 123 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:37,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 424 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:56:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-20 14:56:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 3039. [2022-03-20 14:56:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 1973 states have (on average 1.0952863659401926) internal successors, (2161), 2044 states have internal predecessors, (2161), 696 states have call successors, (696), 370 states have call predecessors, (696), 369 states have return successors, (693), 624 states have call predecessors, (693), 693 states have call successors, (693) [2022-03-20 14:56:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 3550 transitions. [2022-03-20 14:56:38,600 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 3550 transitions. Word has length 517 [2022-03-20 14:56:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:38,600 INFO L478 AbstractCegarLoop]: Abstraction has 3039 states and 3550 transitions. [2022-03-20 14:56:38,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-20 14:56:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 3550 transitions. [2022-03-20 14:56:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-03-20 14:56:38,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:38,611 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 81, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:38,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:38,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:38,830 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 53 times [2022-03-20 14:56:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194715776] [2022-03-20 14:56:38,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 54 times [2022-03-20 14:56:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917716811] [2022-03-20 14:56:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:38,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826581932] [2022-03-20 14:56:38,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:38,842 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:38,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 14:56:39,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 14:56:39,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 14:56:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 15147 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-03-20 14:56:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 2511 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-03-20 14:56:40,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917716811] [2022-03-20 14:56:40,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826581932] [2022-03-20 14:56:40,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826581932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:40,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:40,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2022-03-20 14:56:40,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:40,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194715776] [2022-03-20 14:56:40,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194715776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:40,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:40,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 14:56:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997550283] [2022-03-20 14:56:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:40,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 14:56:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 14:56:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:40,651 INFO L87 Difference]: Start difference. First operand 3039 states and 3550 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-20 14:56:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:41,951 INFO L93 Difference]: Finished difference Result 3168 states and 3711 transitions. [2022-03-20 14:56:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 14:56:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) Word has length 536 [2022-03-20 14:56:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:41,958 INFO L225 Difference]: With dead ends: 3168 [2022-03-20 14:56:41,958 INFO L226 Difference]: Without dead ends: 3159 [2022-03-20 14:56:41,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1018 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2762, Invalid=3718, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 14:56:41,959 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 114 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:41,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 446 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:56:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-03-20 14:56:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3157. [2022-03-20 14:56:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 2049 states have (on average 1.0951683748169838) internal successors, (2244), 2123 states have internal predecessors, (2244), 724 states have call successors, (724), 384 states have call predecessors, (724), 383 states have return successors, (721), 649 states have call predecessors, (721), 721 states have call successors, (721) [2022-03-20 14:56:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 3689 transitions. [2022-03-20 14:56:42,784 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 3689 transitions. Word has length 536 [2022-03-20 14:56:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:42,784 INFO L478 AbstractCegarLoop]: Abstraction has 3157 states and 3689 transitions. [2022-03-20 14:56:42,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-20 14:56:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 3689 transitions. [2022-03-20 14:56:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-03-20 14:56:42,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:42,791 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 84, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:42,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:42,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 14:56:42,998 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 55 times [2022-03-20 14:56:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903494954] [2022-03-20 14:56:42,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 56 times [2022-03-20 14:56:42,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:42,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643326538] [2022-03-20 14:56:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:43,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:43,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817285178] [2022-03-20 14:56:43,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:56:43,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:43,009 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:43,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 14:56:43,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:56:43,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 14:56:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 16310 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 14:56:44,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 2702 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-03-20 14:56:45,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643326538] [2022-03-20 14:56:45,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817285178] [2022-03-20 14:56:45,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817285178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:45,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:45,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2022-03-20 14:56:45,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903494954] [2022-03-20 14:56:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903494954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 14:56:45,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712975940] [2022-03-20 14:56:45,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:45,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 14:56:45,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 14:56:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:45,324 INFO L87 Difference]: Start difference. First operand 3157 states and 3689 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-20 14:56:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:46,809 INFO L93 Difference]: Finished difference Result 3286 states and 3850 transitions. [2022-03-20 14:56:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 14:56:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) Word has length 555 [2022-03-20 14:56:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:46,817 INFO L225 Difference]: With dead ends: 3286 [2022-03-20 14:56:46,817 INFO L226 Difference]: Without dead ends: 3277 [2022-03-20 14:56:46,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1056 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2815, Invalid=3827, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 14:56:46,818 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 107 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:46,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 468 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:56:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2022-03-20 14:56:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 3275. [2022-03-20 14:56:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 2125 states have (on average 1.0950588235294119) internal successors, (2327), 2202 states have internal predecessors, (2327), 752 states have call successors, (752), 398 states have call predecessors, (752), 397 states have return successors, (749), 674 states have call predecessors, (749), 749 states have call successors, (749) [2022-03-20 14:56:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 3828 transitions. [2022-03-20 14:56:47,675 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 3828 transitions. Word has length 555 [2022-03-20 14:56:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:47,675 INFO L478 AbstractCegarLoop]: Abstraction has 3275 states and 3828 transitions. [2022-03-20 14:56:47,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-20 14:56:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 3828 transitions. [2022-03-20 14:56:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-03-20 14:56:47,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:47,682 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 87, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:47,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:47,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 14:56:47,895 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 57 times [2022-03-20 14:56:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410370746] [2022-03-20 14:56:47,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 58 times [2022-03-20 14:56:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415329898] [2022-03-20 14:56:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:47,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:47,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970514336] [2022-03-20 14:56:47,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:56:47,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:47,907 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:47,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 14:56:48,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:56:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:56:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 14:56:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:56:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 17516 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-20 14:56:49,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:56:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 2900 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-03-20 14:56:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:56:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415329898] [2022-03-20 14:56:49,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:56:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970514336] [2022-03-20 14:56:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970514336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:56:49,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:56:49,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 54 [2022-03-20 14:56:49,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:56:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410370746] [2022-03-20 14:56:49,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410370746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:56:49,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:56:49,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 14:56:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387619170] [2022-03-20 14:56:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:56:49,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 14:56:49,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 14:56:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:56:49,925 INFO L87 Difference]: Start difference. First operand 3275 states and 3828 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-20 14:56:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:56:51,501 INFO L93 Difference]: Finished difference Result 3404 states and 3989 transitions. [2022-03-20 14:56:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 14:56:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) Word has length 574 [2022-03-20 14:56:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:56:51,508 INFO L225 Difference]: With dead ends: 3404 [2022-03-20 14:56:51,508 INFO L226 Difference]: Without dead ends: 3395 [2022-03-20 14:56:51,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2868, Invalid=3938, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 14:56:51,509 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 137 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:56:51,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 460 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:56:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2022-03-20 14:56:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3393. [2022-03-20 14:56:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2201 states have (on average 1.0949568378009995) internal successors, (2410), 2281 states have internal predecessors, (2410), 780 states have call successors, (780), 412 states have call predecessors, (780), 411 states have return successors, (777), 699 states have call predecessors, (777), 777 states have call successors, (777) [2022-03-20 14:56:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 3967 transitions. [2022-03-20 14:56:52,397 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 3967 transitions. Word has length 574 [2022-03-20 14:56:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:56:52,398 INFO L478 AbstractCegarLoop]: Abstraction has 3393 states and 3967 transitions. [2022-03-20 14:56:52,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-20 14:56:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 3967 transitions. [2022-03-20 14:56:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-03-20 14:56:52,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:56:52,405 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 90, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:56:52,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 14:56:52,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:52,619 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:56:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:56:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 59 times [2022-03-20 14:56:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:56:52,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1845516695] [2022-03-20 14:56:52,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:56:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 60 times [2022-03-20 14:56:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:56:52,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223870670] [2022-03-20 14:56:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:56:52,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:56:52,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:56:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828890770] [2022-03-20 14:56:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:56:52,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:56:52,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:56:52,631 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:56:52,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 14:58:08,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-03-20 14:58:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:08,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 14:58:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 18765 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 14:58:09,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 3105 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-03-20 14:58:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223870670] [2022-03-20 14:58:10,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828890770] [2022-03-20 14:58:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828890770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:10,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:10,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-20 14:58:10,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1845516695] [2022-03-20 14:58:10,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1845516695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:10,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:10,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 14:58:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588180391] [2022-03-20 14:58:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:10,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 14:58:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 14:58:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:10,797 INFO L87 Difference]: Start difference. First operand 3393 states and 3967 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-20 14:58:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:12,427 INFO L93 Difference]: Finished difference Result 3522 states and 4128 transitions. [2022-03-20 14:58:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 14:58:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) Word has length 593 [2022-03-20 14:58:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:12,434 INFO L225 Difference]: With dead ends: 3522 [2022-03-20 14:58:12,435 INFO L226 Difference]: Without dead ends: 3513 [2022-03-20 14:58:12,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1132 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2921, Invalid=4051, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 14:58:12,436 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 72 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:12,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 522 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-03-20 14:58:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-03-20 14:58:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2277 states have (on average 1.0948616600790513) internal successors, (2493), 2360 states have internal predecessors, (2493), 808 states have call successors, (808), 426 states have call predecessors, (808), 425 states have return successors, (805), 724 states have call predecessors, (805), 805 states have call successors, (805) [2022-03-20 14:58:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 4106 transitions. [2022-03-20 14:58:13,414 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 4106 transitions. Word has length 593 [2022-03-20 14:58:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:13,414 INFO L478 AbstractCegarLoop]: Abstraction has 3511 states and 4106 transitions. [2022-03-20 14:58:13,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-20 14:58:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 4106 transitions. [2022-03-20 14:58:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-03-20 14:58:13,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:13,421 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 93, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:13,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:13,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:13,644 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 61 times [2022-03-20 14:58:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1651095679] [2022-03-20 14:58:13,645 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 62 times [2022-03-20 14:58:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:13,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913651187] [2022-03-20 14:58:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:13,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:13,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030207760] [2022-03-20 14:58:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:13,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:13,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:13,657 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:13,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 14:58:13,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:13,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 14:58:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 20057 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-03-20 14:58:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 3317 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-03-20 14:58:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913651187] [2022-03-20 14:58:15,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030207760] [2022-03-20 14:58:15,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030207760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:15,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:15,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 54 [2022-03-20 14:58:15,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1651095679] [2022-03-20 14:58:15,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1651095679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:15,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:15,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 14:58:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399570511] [2022-03-20 14:58:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:15,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 14:58:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 14:58:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:15,835 INFO L87 Difference]: Start difference. First operand 3511 states and 4106 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-20 14:58:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:17,298 INFO L93 Difference]: Finished difference Result 3640 states and 4267 transitions. [2022-03-20 14:58:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 14:58:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) Word has length 612 [2022-03-20 14:58:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:17,306 INFO L225 Difference]: With dead ends: 3640 [2022-03-20 14:58:17,306 INFO L226 Difference]: Without dead ends: 3631 [2022-03-20 14:58:17,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1170 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2974, Invalid=4166, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 14:58:17,307 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 110 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:17,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 514 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-03-20 14:58:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3629. [2022-03-20 14:58:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 2353 states have (on average 1.094772630684233) internal successors, (2576), 2439 states have internal predecessors, (2576), 836 states have call successors, (836), 440 states have call predecessors, (836), 439 states have return successors, (833), 749 states have call predecessors, (833), 833 states have call successors, (833) [2022-03-20 14:58:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4245 transitions. [2022-03-20 14:58:18,261 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4245 transitions. Word has length 612 [2022-03-20 14:58:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:18,262 INFO L478 AbstractCegarLoop]: Abstraction has 3629 states and 4245 transitions. [2022-03-20 14:58:18,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-20 14:58:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4245 transitions. [2022-03-20 14:58:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-03-20 14:58:18,269 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:18,269 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 96, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:18,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:18,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:18,483 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 63 times [2022-03-20 14:58:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:18,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973531029] [2022-03-20 14:58:18,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 64 times [2022-03-20 14:58:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:18,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439490027] [2022-03-20 14:58:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:18,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:18,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605636527] [2022-03-20 14:58:18,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:18,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:18,517 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:18,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 14:58:18,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 14:58:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 21392 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-03-20 14:58:19,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 3536 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-03-20 14:58:20,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439490027] [2022-03-20 14:58:20,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605636527] [2022-03-20 14:58:20,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605636527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:20,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:20,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2022-03-20 14:58:20,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973531029] [2022-03-20 14:58:20,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973531029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:20,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:20,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 14:58:20,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310750842] [2022-03-20 14:58:20,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:20,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 14:58:20,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 14:58:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:20,862 INFO L87 Difference]: Start difference. First operand 3629 states and 4245 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-20 14:58:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:22,502 INFO L93 Difference]: Finished difference Result 3758 states and 4406 transitions. [2022-03-20 14:58:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 14:58:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) Word has length 631 [2022-03-20 14:58:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:22,510 INFO L225 Difference]: With dead ends: 3758 [2022-03-20 14:58:22,510 INFO L226 Difference]: Without dead ends: 3749 [2022-03-20 14:58:22,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1208 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3027, Invalid=4283, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 14:58:22,511 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 122 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:22,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 496 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-03-20 14:58:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3747. [2022-03-20 14:58:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2429 states have (on average 1.0946891724989707) internal successors, (2659), 2518 states have internal predecessors, (2659), 864 states have call successors, (864), 454 states have call predecessors, (864), 453 states have return successors, (861), 774 states have call predecessors, (861), 861 states have call successors, (861) [2022-03-20 14:58:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4384 transitions. [2022-03-20 14:58:23,495 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4384 transitions. Word has length 631 [2022-03-20 14:58:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:23,495 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4384 transitions. [2022-03-20 14:58:23,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-20 14:58:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4384 transitions. [2022-03-20 14:58:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-20 14:58:23,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:23,503 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 99, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:23,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:23,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:23,716 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 65 times [2022-03-20 14:58:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:23,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841035197] [2022-03-20 14:58:23,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 66 times [2022-03-20 14:58:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820771202] [2022-03-20 14:58:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:23,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082763481] [2022-03-20 14:58:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:23,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:23,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:23,738 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:23,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 14:58:24,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-03-20 14:58:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 14:58:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 22770 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 14:58:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 3762 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-03-20 14:58:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820771202] [2022-03-20 14:58:26,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082763481] [2022-03-20 14:58:26,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082763481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:26,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:26,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2022-03-20 14:58:26,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841035197] [2022-03-20 14:58:26,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841035197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:26,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:26,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 14:58:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064946504] [2022-03-20 14:58:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:26,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 14:58:26,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 14:58:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:26,076 INFO L87 Difference]: Start difference. First operand 3747 states and 4384 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-20 14:58:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:27,693 INFO L93 Difference]: Finished difference Result 3876 states and 4545 transitions. [2022-03-20 14:58:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 14:58:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) Word has length 650 [2022-03-20 14:58:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:27,700 INFO L225 Difference]: With dead ends: 3876 [2022-03-20 14:58:27,700 INFO L226 Difference]: Without dead ends: 3867 [2022-03-20 14:58:27,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1246 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3080, Invalid=4402, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 14:58:27,701 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 101 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:27,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 548 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-03-20 14:58:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3865. [2022-03-20 14:58:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 2505 states have (on average 1.0946107784431138) internal successors, (2742), 2597 states have internal predecessors, (2742), 892 states have call successors, (892), 468 states have call predecessors, (892), 467 states have return successors, (889), 799 states have call predecessors, (889), 889 states have call successors, (889) [2022-03-20 14:58:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 4523 transitions. [2022-03-20 14:58:28,732 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 4523 transitions. Word has length 650 [2022-03-20 14:58:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:28,733 INFO L478 AbstractCegarLoop]: Abstraction has 3865 states and 4523 transitions. [2022-03-20 14:58:28,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-20 14:58:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 4523 transitions. [2022-03-20 14:58:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-03-20 14:58:28,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:28,759 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 102, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:28,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:28,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 14:58:28,967 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 67 times [2022-03-20 14:58:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:28,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313647968] [2022-03-20 14:58:28,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 68 times [2022-03-20 14:58:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607482814] [2022-03-20 14:58:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:28,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011805477] [2022-03-20 14:58:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:28,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:28,979 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:28,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 14:58:29,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:29,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 14:58:29,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 24191 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-20 14:58:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 3995 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2022-03-20 14:58:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:31,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607482814] [2022-03-20 14:58:31,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:31,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011805477] [2022-03-20 14:58:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011805477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:31,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:31,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2022-03-20 14:58:31,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313647968] [2022-03-20 14:58:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313647968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:31,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:31,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 14:58:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056787135] [2022-03-20 14:58:31,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:31,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 14:58:31,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:31,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 14:58:31,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:31,337 INFO L87 Difference]: Start difference. First operand 3865 states and 4523 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-20 14:58:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:33,038 INFO L93 Difference]: Finished difference Result 3994 states and 4684 transitions. [2022-03-20 14:58:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 14:58:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) Word has length 669 [2022-03-20 14:58:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:33,045 INFO L225 Difference]: With dead ends: 3994 [2022-03-20 14:58:33,045 INFO L226 Difference]: Without dead ends: 3985 [2022-03-20 14:58:33,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1284 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3133, Invalid=4523, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 14:58:33,048 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 172 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:33,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 500 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2022-03-20 14:58:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3983. [2022-03-20 14:58:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 2581 states have (on average 1.09453700116234) internal successors, (2825), 2676 states have internal predecessors, (2825), 920 states have call successors, (920), 482 states have call predecessors, (920), 481 states have return successors, (917), 824 states have call predecessors, (917), 917 states have call successors, (917) [2022-03-20 14:58:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4662 transitions. [2022-03-20 14:58:34,110 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4662 transitions. Word has length 669 [2022-03-20 14:58:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:34,113 INFO L478 AbstractCegarLoop]: Abstraction has 3983 states and 4662 transitions. [2022-03-20 14:58:34,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-20 14:58:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4662 transitions. [2022-03-20 14:58:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-03-20 14:58:34,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:34,143 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 105, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:34,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:34,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:34,359 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 69 times [2022-03-20 14:58:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719151423] [2022-03-20 14:58:34,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 70 times [2022-03-20 14:58:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953189507] [2022-03-20 14:58:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:34,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137432269] [2022-03-20 14:58:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:34,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:34,372 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:34,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 14:58:34,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 14:58:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 25655 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 14:58:35,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 4235 refuted. 0 times theorem prover too weak. 21844 trivial. 0 not checked. [2022-03-20 14:58:37,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953189507] [2022-03-20 14:58:37,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137432269] [2022-03-20 14:58:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137432269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:37,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 54 [2022-03-20 14:58:37,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719151423] [2022-03-20 14:58:37,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719151423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:37,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:37,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 14:58:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103530704] [2022-03-20 14:58:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:37,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 14:58:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 14:58:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:37,140 INFO L87 Difference]: Start difference. First operand 3983 states and 4662 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-20 14:58:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:39,273 INFO L93 Difference]: Finished difference Result 4112 states and 4823 transitions. [2022-03-20 14:58:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 14:58:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) Word has length 688 [2022-03-20 14:58:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:39,282 INFO L225 Difference]: With dead ends: 4112 [2022-03-20 14:58:39,282 INFO L226 Difference]: Without dead ends: 4103 [2022-03-20 14:58:39,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1322 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3186, Invalid=4646, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 14:58:39,285 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 169 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:39,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 532 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:58:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2022-03-20 14:58:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2022-03-20 14:58:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 2657 states have (on average 1.0944674444862628) internal successors, (2908), 2755 states have internal predecessors, (2908), 948 states have call successors, (948), 496 states have call predecessors, (948), 495 states have return successors, (945), 849 states have call predecessors, (945), 945 states have call successors, (945) [2022-03-20 14:58:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 4801 transitions. [2022-03-20 14:58:40,417 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 4801 transitions. Word has length 688 [2022-03-20 14:58:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:40,417 INFO L478 AbstractCegarLoop]: Abstraction has 4101 states and 4801 transitions. [2022-03-20 14:58:40,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-20 14:58:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 4801 transitions. [2022-03-20 14:58:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-03-20 14:58:40,426 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:40,426 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 108, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:40,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:40,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 14:58:40,640 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 71 times [2022-03-20 14:58:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183110039] [2022-03-20 14:58:40,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 72 times [2022-03-20 14:58:40,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:40,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983876414] [2022-03-20 14:58:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:40,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:40,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302609963] [2022-03-20 14:58:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:40,654 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:40,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 14:58:41,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-20 14:58:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 14:58:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 27162 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-03-20 14:58:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 4482 refuted. 0 times theorem prover too weak. 23116 trivial. 0 not checked. [2022-03-20 14:58:43,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983876414] [2022-03-20 14:58:43,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302609963] [2022-03-20 14:58:43,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302609963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:43,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:43,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 54 [2022-03-20 14:58:43,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183110039] [2022-03-20 14:58:43,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183110039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:43,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:43,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 14:58:43,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128331336] [2022-03-20 14:58:43,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:43,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 14:58:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 14:58:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:43,542 INFO L87 Difference]: Start difference. First operand 4101 states and 4801 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-20 14:58:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:45,459 INFO L93 Difference]: Finished difference Result 4230 states and 4962 transitions. [2022-03-20 14:58:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 14:58:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) Word has length 707 [2022-03-20 14:58:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:45,470 INFO L225 Difference]: With dead ends: 4230 [2022-03-20 14:58:45,471 INFO L226 Difference]: Without dead ends: 4221 [2022-03-20 14:58:45,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1360 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3239, Invalid=4771, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 14:58:45,472 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 117 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:45,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 554 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2022-03-20 14:58:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4219. [2022-03-20 14:58:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 2733 states have (on average 1.0944017563117454) internal successors, (2991), 2834 states have internal predecessors, (2991), 976 states have call successors, (976), 510 states have call predecessors, (976), 509 states have return successors, (973), 874 states have call predecessors, (973), 973 states have call successors, (973) [2022-03-20 14:58:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 4940 transitions. [2022-03-20 14:58:46,592 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 4940 transitions. Word has length 707 [2022-03-20 14:58:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:46,593 INFO L478 AbstractCegarLoop]: Abstraction has 4219 states and 4940 transitions. [2022-03-20 14:58:46,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-20 14:58:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 4940 transitions. [2022-03-20 14:58:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-03-20 14:58:46,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:46,628 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 111, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:46,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 14:58:46,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 14:58:46,850 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 73 times [2022-03-20 14:58:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:46,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096119497] [2022-03-20 14:58:46,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 74 times [2022-03-20 14:58:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4346246] [2022-03-20 14:58:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:46,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:46,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22761155] [2022-03-20 14:58:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:58:46,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:46,868 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:46,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 14:58:47,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:58:47,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 14:58:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 28712 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 14:58:48,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 4736 refuted. 0 times theorem prover too weak. 24424 trivial. 0 not checked. [2022-03-20 14:58:49,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4346246] [2022-03-20 14:58:49,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22761155] [2022-03-20 14:58:49,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22761155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:49,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:49,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 54 [2022-03-20 14:58:49,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096119497] [2022-03-20 14:58:49,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096119497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:49,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:49,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 14:58:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213965874] [2022-03-20 14:58:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:49,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 14:58:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 14:58:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:49,134 INFO L87 Difference]: Start difference. First operand 4219 states and 4940 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-20 14:58:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:50,959 INFO L93 Difference]: Finished difference Result 4348 states and 5101 transitions. [2022-03-20 14:58:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 14:58:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) Word has length 726 [2022-03-20 14:58:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:50,968 INFO L225 Difference]: With dead ends: 4348 [2022-03-20 14:58:50,968 INFO L226 Difference]: Without dead ends: 4339 [2022-03-20 14:58:50,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1398 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3292, Invalid=4898, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 14:58:50,970 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 157 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:50,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 536 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2022-03-20 14:58:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4337. [2022-03-20 14:58:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 2809 states have (on average 1.0943396226415094) internal successors, (3074), 2913 states have internal predecessors, (3074), 1004 states have call successors, (1004), 524 states have call predecessors, (1004), 523 states have return successors, (1001), 899 states have call predecessors, (1001), 1001 states have call successors, (1001) [2022-03-20 14:58:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 5079 transitions. [2022-03-20 14:58:52,118 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 5079 transitions. Word has length 726 [2022-03-20 14:58:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:52,118 INFO L478 AbstractCegarLoop]: Abstraction has 4337 states and 5079 transitions. [2022-03-20 14:58:52,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-20 14:58:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 5079 transitions. [2022-03-20 14:58:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-03-20 14:58:52,129 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:52,129 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 114, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:52,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:52,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 14:58:52,348 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 75 times [2022-03-20 14:58:52,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:52,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685276054] [2022-03-20 14:58:52,349 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 76 times [2022-03-20 14:58:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:52,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807452032] [2022-03-20 14:58:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:52,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903307240] [2022-03-20 14:58:52,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:58:52,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:52,362 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:52,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 14:58:52,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:58:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:58:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 14:58:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:58:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 30305 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-03-20 14:58:53,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:58:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 4997 refuted. 0 times theorem prover too weak. 25768 trivial. 0 not checked. [2022-03-20 14:58:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:58:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807452032] [2022-03-20 14:58:55,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:58:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903307240] [2022-03-20 14:58:55,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903307240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:58:55,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:58:55,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 54 [2022-03-20 14:58:55,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:58:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685276054] [2022-03-20 14:58:55,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685276054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:58:55,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:58:55,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 14:58:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30086976] [2022-03-20 14:58:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:58:55,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 14:58:55,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 14:58:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:58:55,003 INFO L87 Difference]: Start difference. First operand 4337 states and 5079 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-20 14:58:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:58:56,964 INFO L93 Difference]: Finished difference Result 4466 states and 5240 transitions. [2022-03-20 14:58:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 14:58:56,965 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) Word has length 745 [2022-03-20 14:58:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:58:56,972 INFO L225 Difference]: With dead ends: 4466 [2022-03-20 14:58:56,972 INFO L226 Difference]: Without dead ends: 4457 [2022-03-20 14:58:56,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3345, Invalid=5027, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 14:58:56,973 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:58:56,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 568 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:58:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-03-20 14:58:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 4455. [2022-03-20 14:58:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 2885 states have (on average 1.0942807625649913) internal successors, (3157), 2992 states have internal predecessors, (3157), 1032 states have call successors, (1032), 538 states have call predecessors, (1032), 537 states have return successors, (1029), 924 states have call predecessors, (1029), 1029 states have call successors, (1029) [2022-03-20 14:58:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 5218 transitions. [2022-03-20 14:58:58,124 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 5218 transitions. Word has length 745 [2022-03-20 14:58:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:58:58,124 INFO L478 AbstractCegarLoop]: Abstraction has 4455 states and 5218 transitions. [2022-03-20 14:58:58,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-20 14:58:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 5218 transitions. [2022-03-20 14:58:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-03-20 14:58:58,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:58:58,150 INFO L499 BasicCegarLoop]: trace histogram [118, 117, 117, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:58:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 14:58:58,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 14:58:58,364 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:58:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:58:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 77 times [2022-03-20 14:58:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:58:58,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707070444] [2022-03-20 14:58:58,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:58:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 78 times [2022-03-20 14:58:58,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:58:58,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694834173] [2022-03-20 14:58:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:58:58,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:58:58,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:58:58,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838950184] [2022-03-20 14:58:58,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:58:58,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:58:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:58:58,379 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:58:58,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 14:59:19,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-03-20 14:59:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:19,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 14:59:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 31941 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-03-20 14:59:21,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 5265 refuted. 0 times theorem prover too weak. 27148 trivial. 0 not checked. [2022-03-20 14:59:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:22,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694834173] [2022-03-20 14:59:22,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:22,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838950184] [2022-03-20 14:59:22,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838950184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:22,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:22,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 54 [2022-03-20 14:59:22,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:22,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707070444] [2022-03-20 14:59:22,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707070444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:22,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:22,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 14:59:22,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450735081] [2022-03-20 14:59:22,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:22,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 14:59:22,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 14:59:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:22,575 INFO L87 Difference]: Start difference. First operand 4455 states and 5218 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-20 14:59:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:24,788 INFO L93 Difference]: Finished difference Result 4584 states and 5379 transitions. [2022-03-20 14:59:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 14:59:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) Word has length 764 [2022-03-20 14:59:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:24,797 INFO L225 Difference]: With dead ends: 4584 [2022-03-20 14:59:24,797 INFO L226 Difference]: Without dead ends: 4575 [2022-03-20 14:59:24,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1474 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3398, Invalid=5158, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 14:59:24,798 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:24,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 600 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:59:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2022-03-20 14:59:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4573. [2022-03-20 14:59:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 2961 states have (on average 1.094224924012158) internal successors, (3240), 3071 states have internal predecessors, (3240), 1060 states have call successors, (1060), 552 states have call predecessors, (1060), 551 states have return successors, (1057), 949 states have call predecessors, (1057), 1057 states have call successors, (1057) [2022-03-20 14:59:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 5357 transitions. [2022-03-20 14:59:25,995 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 5357 transitions. Word has length 764 [2022-03-20 14:59:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:25,996 INFO L478 AbstractCegarLoop]: Abstraction has 4573 states and 5357 transitions. [2022-03-20 14:59:25,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-20 14:59:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 5357 transitions. [2022-03-20 14:59:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-03-20 14:59:26,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:26,005 INFO L499 BasicCegarLoop]: trace histogram [121, 120, 120, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:26,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:26,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:26,207 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 79 times [2022-03-20 14:59:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:26,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691215636] [2022-03-20 14:59:26,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 80 times [2022-03-20 14:59:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112658868] [2022-03-20 14:59:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:26,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:26,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:26,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512104374] [2022-03-20 14:59:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:26,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:26,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:26,229 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:26,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 14:59:26,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:26,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 14:59:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 33620 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 14:59:27,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 5540 refuted. 0 times theorem prover too weak. 28564 trivial. 0 not checked. [2022-03-20 14:59:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112658868] [2022-03-20 14:59:28,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512104374] [2022-03-20 14:59:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512104374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:28,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:28,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 54 [2022-03-20 14:59:28,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691215636] [2022-03-20 14:59:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691215636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:28,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:28,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 14:59:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225848795] [2022-03-20 14:59:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:28,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 14:59:28,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 14:59:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:28,499 INFO L87 Difference]: Start difference. First operand 4573 states and 5357 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-20 14:59:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:30,485 INFO L93 Difference]: Finished difference Result 4702 states and 5518 transitions. [2022-03-20 14:59:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 14:59:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) Word has length 783 [2022-03-20 14:59:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:30,494 INFO L225 Difference]: With dead ends: 4702 [2022-03-20 14:59:30,494 INFO L226 Difference]: Without dead ends: 4693 [2022-03-20 14:59:30,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1605 GetRequests, 1512 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3451, Invalid=5291, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 14:59:30,496 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 134 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:30,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 612 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:59:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-03-20 14:59:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4691. [2022-03-20 14:59:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3037 states have (on average 1.0941718801448799) internal successors, (3323), 3150 states have internal predecessors, (3323), 1088 states have call successors, (1088), 566 states have call predecessors, (1088), 565 states have return successors, (1085), 974 states have call predecessors, (1085), 1085 states have call successors, (1085) [2022-03-20 14:59:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 5496 transitions. [2022-03-20 14:59:31,743 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 5496 transitions. Word has length 783 [2022-03-20 14:59:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:31,744 INFO L478 AbstractCegarLoop]: Abstraction has 4691 states and 5496 transitions. [2022-03-20 14:59:31,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-20 14:59:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 5496 transitions. [2022-03-20 14:59:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-03-20 14:59:31,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:31,754 INFO L499 BasicCegarLoop]: trace histogram [124, 123, 123, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:31,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:31,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:31,963 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 81 times [2022-03-20 14:59:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:31,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039642351] [2022-03-20 14:59:31,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 82 times [2022-03-20 14:59:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:31,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517537160] [2022-03-20 14:59:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:31,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47254676] [2022-03-20 14:59:31,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:31,977 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 14:59:32,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 14:59:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 35342 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-20 14:59:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 5822 refuted. 0 times theorem prover too weak. 30016 trivial. 0 not checked. [2022-03-20 14:59:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517537160] [2022-03-20 14:59:35,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47254676] [2022-03-20 14:59:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47254676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:35,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:35,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 54 [2022-03-20 14:59:35,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039642351] [2022-03-20 14:59:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039642351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 14:59:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64254151] [2022-03-20 14:59:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:35,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 14:59:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 14:59:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:35,015 INFO L87 Difference]: Start difference. First operand 4691 states and 5496 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-20 14:59:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:37,538 INFO L93 Difference]: Finished difference Result 4820 states and 5657 transitions. [2022-03-20 14:59:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 14:59:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) Word has length 802 [2022-03-20 14:59:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:37,547 INFO L225 Difference]: With dead ends: 4820 [2022-03-20 14:59:37,547 INFO L226 Difference]: Without dead ends: 4811 [2022-03-20 14:59:37,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1550 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3504, Invalid=5426, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 14:59:37,548 INFO L913 BasicCegarLoop]: 155 mSDtfsCounter, 150 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:37,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 614 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:59:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-03-20 14:59:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4809. [2022-03-20 14:59:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 3113 states have (on average 1.0941214262769032) internal successors, (3406), 3229 states have internal predecessors, (3406), 1116 states have call successors, (1116), 580 states have call predecessors, (1116), 579 states have return successors, (1113), 999 states have call predecessors, (1113), 1113 states have call successors, (1113) [2022-03-20 14:59:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5635 transitions. [2022-03-20 14:59:38,848 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5635 transitions. Word has length 802 [2022-03-20 14:59:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:38,848 INFO L478 AbstractCegarLoop]: Abstraction has 4809 states and 5635 transitions. [2022-03-20 14:59:38,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-20 14:59:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5635 transitions. [2022-03-20 14:59:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-03-20 14:59:38,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:38,860 INFO L499 BasicCegarLoop]: trace histogram [127, 126, 126, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:38,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:39,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:39,075 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 83 times [2022-03-20 14:59:39,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184408609] [2022-03-20 14:59:39,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 84 times [2022-03-20 14:59:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154438229] [2022-03-20 14:59:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:39,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249048930] [2022-03-20 14:59:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:59:39,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:39,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:39,089 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:39,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 14:59:42,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-03-20 14:59:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 14:59:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 37107 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-03-20 14:59:44,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 6111 refuted. 0 times theorem prover too weak. 31504 trivial. 0 not checked. [2022-03-20 14:59:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154438229] [2022-03-20 14:59:44,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249048930] [2022-03-20 14:59:44,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249048930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:44,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 54 [2022-03-20 14:59:44,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184408609] [2022-03-20 14:59:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184408609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:44,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 14:59:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328767450] [2022-03-20 14:59:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:44,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 14:59:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 14:59:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:44,952 INFO L87 Difference]: Start difference. First operand 4809 states and 5635 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-20 14:59:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:47,040 INFO L93 Difference]: Finished difference Result 4938 states and 5796 transitions. [2022-03-20 14:59:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 14:59:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) Word has length 821 [2022-03-20 14:59:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:47,048 INFO L225 Difference]: With dead ends: 4938 [2022-03-20 14:59:47,048 INFO L226 Difference]: Without dead ends: 4929 [2022-03-20 14:59:47,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1588 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3557, Invalid=5563, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 14:59:47,050 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 139 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:47,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 636 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:59:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2022-03-20 14:59:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4927. [2022-03-20 14:59:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 3189 states have (on average 1.0940733772342428) internal successors, (3489), 3308 states have internal predecessors, (3489), 1144 states have call successors, (1144), 594 states have call predecessors, (1144), 593 states have return successors, (1141), 1024 states have call predecessors, (1141), 1141 states have call successors, (1141) [2022-03-20 14:59:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 5774 transitions. [2022-03-20 14:59:48,327 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 5774 transitions. Word has length 821 [2022-03-20 14:59:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:48,327 INFO L478 AbstractCegarLoop]: Abstraction has 4927 states and 5774 transitions. [2022-03-20 14:59:48,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-20 14:59:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 5774 transitions. [2022-03-20 14:59:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-03-20 14:59:48,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:48,337 INFO L499 BasicCegarLoop]: trace histogram [130, 129, 129, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:48,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:48,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-20 14:59:48,543 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 85 times [2022-03-20 14:59:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:48,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549666370] [2022-03-20 14:59:48,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 86 times [2022-03-20 14:59:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601451231] [2022-03-20 14:59:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:48,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:48,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731471943] [2022-03-20 14:59:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:59:48,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:48,559 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:48,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 14:59:48,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:59:48,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:48,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 14:59:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 38915 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-03-20 14:59:50,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 6407 refuted. 0 times theorem prover too weak. 33028 trivial. 0 not checked. [2022-03-20 14:59:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601451231] [2022-03-20 14:59:51,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731471943] [2022-03-20 14:59:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731471943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:51,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:51,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-03-20 14:59:51,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549666370] [2022-03-20 14:59:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549666370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:51,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:51,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 14:59:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542394207] [2022-03-20 14:59:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:51,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 14:59:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 14:59:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:51,040 INFO L87 Difference]: Start difference. First operand 4927 states and 5774 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-20 14:59:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:59:53,745 INFO L93 Difference]: Finished difference Result 5056 states and 5935 transitions. [2022-03-20 14:59:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 14:59:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) Word has length 840 [2022-03-20 14:59:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:59:53,774 INFO L225 Difference]: With dead ends: 5056 [2022-03-20 14:59:53,774 INFO L226 Difference]: Without dead ends: 5047 [2022-03-20 14:59:53,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1626 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3610, Invalid=5702, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 14:59:53,777 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 125 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:59:53,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 668 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:59:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2022-03-20 14:59:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5045. [2022-03-20 14:59:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 3265 states have (on average 1.0940275650842266) internal successors, (3572), 3387 states have internal predecessors, (3572), 1172 states have call successors, (1172), 608 states have call predecessors, (1172), 607 states have return successors, (1169), 1049 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-03-20 14:59:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 5913 transitions. [2022-03-20 14:59:55,127 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 5913 transitions. Word has length 840 [2022-03-20 14:59:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:59:55,128 INFO L478 AbstractCegarLoop]: Abstraction has 5045 states and 5913 transitions. [2022-03-20 14:59:55,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-20 14:59:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 5913 transitions. [2022-03-20 14:59:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-03-20 14:59:55,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:59:55,140 INFO L499 BasicCegarLoop]: trace histogram [133, 132, 132, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:59:55,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 14:59:55,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:55,359 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:59:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:59:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 87 times [2022-03-20 14:59:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110185932] [2022-03-20 14:59:55,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:59:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 88 times [2022-03-20 14:59:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:59:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141910855] [2022-03-20 14:59:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:59:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:59:55,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:59:55,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123777921] [2022-03-20 14:59:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:59:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:59:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:59:55,374 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:59:55,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 14:59:55,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:59:55,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:59:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 14:59:55,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:59:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 40766 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-03-20 14:59:57,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:59:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 6710 refuted. 0 times theorem prover too weak. 34588 trivial. 0 not checked. [2022-03-20 14:59:58,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:59:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141910855] [2022-03-20 14:59:58,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:59:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123777921] [2022-03-20 14:59:58,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123777921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:59:58,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:59:58,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 54 [2022-03-20 14:59:58,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:59:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110185932] [2022-03-20 14:59:58,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110185932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:59:58,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:59:58,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 14:59:58,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841751670] [2022-03-20 14:59:58,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:59:58,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 14:59:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:59:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 14:59:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:59:58,443 INFO L87 Difference]: Start difference. First operand 5045 states and 5913 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-20 15:00:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:00,807 INFO L93 Difference]: Finished difference Result 5174 states and 6074 transitions. [2022-03-20 15:00:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 15:00:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) Word has length 859 [2022-03-20 15:00:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:00,817 INFO L225 Difference]: With dead ends: 5174 [2022-03-20 15:00:00,817 INFO L226 Difference]: Without dead ends: 5165 [2022-03-20 15:00:00,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1664 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3663, Invalid=5843, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 15:00:00,819 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 174 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:00,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 670 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:00:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-03-20 15:00:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5163. [2022-03-20 15:00:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3341 states have (on average 1.0939838371744988) internal successors, (3655), 3466 states have internal predecessors, (3655), 1200 states have call successors, (1200), 622 states have call predecessors, (1200), 621 states have return successors, (1197), 1074 states have call predecessors, (1197), 1197 states have call successors, (1197) [2022-03-20 15:00:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 6052 transitions. [2022-03-20 15:00:02,237 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 6052 transitions. Word has length 859 [2022-03-20 15:00:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:02,237 INFO L478 AbstractCegarLoop]: Abstraction has 5163 states and 6052 transitions. [2022-03-20 15:00:02,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-20 15:00:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 6052 transitions. [2022-03-20 15:00:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-03-20 15:00:02,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:02,250 INFO L499 BasicCegarLoop]: trace histogram [136, 135, 135, 46, 45, 45, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:02,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:02,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:02,463 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 89 times [2022-03-20 15:00:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:02,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672010850] [2022-03-20 15:00:02,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 90 times [2022-03-20 15:00:02,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:02,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145946231] [2022-03-20 15:00:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:02,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:02,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:02,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125611669] [2022-03-20 15:00:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:00:02,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:02,505 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 15:00:34,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-03-20 15:00:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 15:00:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 42660 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 15:00:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 7020 refuted. 0 times theorem prover too weak. 36184 trivial. 0 not checked. [2022-03-20 15:00:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145946231] [2022-03-20 15:00:37,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125611669] [2022-03-20 15:00:37,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125611669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:37,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 54 [2022-03-20 15:00:37,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:37,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672010850] [2022-03-20 15:00:37,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672010850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:37,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 15:00:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153815777] [2022-03-20 15:00:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:37,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 15:00:37,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 15:00:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:00:37,815 INFO L87 Difference]: Start difference. First operand 5163 states and 6052 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-20 15:00:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:40,683 INFO L93 Difference]: Finished difference Result 5292 states and 6213 transitions. [2022-03-20 15:00:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 15:00:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 878 [2022-03-20 15:00:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:40,692 INFO L225 Difference]: With dead ends: 5292 [2022-03-20 15:00:40,692 INFO L226 Difference]: Without dead ends: 5283 [2022-03-20 15:00:40,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1702 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3716, Invalid=5986, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 15:00:40,694 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 172 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:40,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 662 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:00:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2022-03-20 15:00:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5281. [2022-03-20 15:00:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 3417 states have (on average 1.0939420544337137) internal successors, (3738), 3545 states have internal predecessors, (3738), 1228 states have call successors, (1228), 636 states have call predecessors, (1228), 635 states have return successors, (1225), 1099 states have call predecessors, (1225), 1225 states have call successors, (1225) [2022-03-20 15:00:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 6191 transitions. [2022-03-20 15:00:42,192 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 6191 transitions. Word has length 878 [2022-03-20 15:00:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:42,193 INFO L478 AbstractCegarLoop]: Abstraction has 5281 states and 6191 transitions. [2022-03-20 15:00:42,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-20 15:00:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 6191 transitions. [2022-03-20 15:00:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-03-20 15:00:42,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:42,206 INFO L499 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:42,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:42,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 15:00:42,423 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 91 times [2022-03-20 15:00:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:42,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524406876] [2022-03-20 15:00:42,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 92 times [2022-03-20 15:00:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630027930] [2022-03-20 15:00:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:42,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:42,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94093765] [2022-03-20 15:00:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:00:42,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:42,440 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:42,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 15:00:42,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:00:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 15:00:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-20 15:00:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-03-20 15:00:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630027930] [2022-03-20 15:00:46,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94093765] [2022-03-20 15:00:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94093765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:46,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:46,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-03-20 15:00:46,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524406876] [2022-03-20 15:00:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524406876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:46,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:46,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 15:00:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294135963] [2022-03-20 15:00:46,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:46,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 15:00:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 15:00:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:00:46,140 INFO L87 Difference]: Start difference. First operand 5281 states and 6191 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-20 15:00:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:49,369 INFO L93 Difference]: Finished difference Result 5410 states and 6352 transitions. [2022-03-20 15:00:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 15:00:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) Word has length 897 [2022-03-20 15:00:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:49,381 INFO L225 Difference]: With dead ends: 5410 [2022-03-20 15:00:49,381 INFO L226 Difference]: Without dead ends: 5401 [2022-03-20 15:00:49,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1740 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3769, Invalid=6131, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 15:00:49,383 INFO L913 BasicCegarLoop]: 170 mSDtfsCounter, 155 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:49,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 684 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:00:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2022-03-20 15:00:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 5399. [2022-03-20 15:00:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 3493 states have (on average 1.093902089894074) internal successors, (3821), 3624 states have internal predecessors, (3821), 1256 states have call successors, (1256), 650 states have call predecessors, (1256), 649 states have return successors, (1253), 1124 states have call predecessors, (1253), 1253 states have call successors, (1253) [2022-03-20 15:00:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 6330 transitions. [2022-03-20 15:00:50,854 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 6330 transitions. Word has length 897 [2022-03-20 15:00:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:50,854 INFO L478 AbstractCegarLoop]: Abstraction has 5399 states and 6330 transitions. [2022-03-20 15:00:50,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-20 15:00:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 6330 transitions. [2022-03-20 15:00:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2022-03-20 15:00:50,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:50,867 INFO L499 BasicCegarLoop]: trace histogram [142, 141, 141, 48, 47, 47, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:50,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:51,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 15:00:51,083 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 93 times [2022-03-20 15:00:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:51,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666416827] [2022-03-20 15:00:51,084 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 94 times [2022-03-20 15:00:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333321081] [2022-03-20 15:00:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:51,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:51,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146377827] [2022-03-20 15:00:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:00:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:51,100 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:51,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 15:00:51,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:00:51,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:00:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 15:00:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:00:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 46577 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-03-20 15:00:53,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:00:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 7661 refuted. 0 times theorem prover too weak. 39484 trivial. 0 not checked. [2022-03-20 15:00:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:00:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333321081] [2022-03-20 15:00:54,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:00:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146377827] [2022-03-20 15:00:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146377827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:00:54,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:00:54,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 54 [2022-03-20 15:00:54,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:00:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666416827] [2022-03-20 15:00:54,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666416827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:00:54,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:00:54,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 15:00:54,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131924836] [2022-03-20 15:00:54,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:00:54,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 15:00:54,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 15:00:54,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:00:54,860 INFO L87 Difference]: Start difference. First operand 5399 states and 6330 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-20 15:00:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:00:57,874 INFO L93 Difference]: Finished difference Result 5528 states and 6491 transitions. [2022-03-20 15:00:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 15:00:57,875 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) Word has length 916 [2022-03-20 15:00:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:00:57,884 INFO L225 Difference]: With dead ends: 5528 [2022-03-20 15:00:57,884 INFO L226 Difference]: Without dead ends: 5519 [2022-03-20 15:00:57,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3822, Invalid=6278, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 15:00:57,885 INFO L913 BasicCegarLoop]: 173 mSDtfsCounter, 205 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:00:57,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 686 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:00:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-03-20 15:00:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-03-20 15:00:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 3569 states have (on average 1.0938638274026338) internal successors, (3904), 3703 states have internal predecessors, (3904), 1284 states have call successors, (1284), 664 states have call predecessors, (1284), 663 states have return successors, (1281), 1149 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-03-20 15:00:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 6469 transitions. [2022-03-20 15:00:59,457 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 6469 transitions. Word has length 916 [2022-03-20 15:00:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:00:59,458 INFO L478 AbstractCegarLoop]: Abstraction has 5517 states and 6469 transitions. [2022-03-20 15:00:59,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-20 15:00:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 6469 transitions. [2022-03-20 15:00:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-03-20 15:00:59,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:00:59,470 INFO L499 BasicCegarLoop]: trace histogram [145, 144, 144, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:00:59,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 15:00:59,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:59,683 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:00:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:00:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 95 times [2022-03-20 15:00:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:00:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249533714] [2022-03-20 15:00:59,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:00:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 96 times [2022-03-20 15:00:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:00:59,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182960067] [2022-03-20 15:00:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:00:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:00:59,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:00:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525646894] [2022-03-20 15:00:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:00:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:00:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:00:59,699 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:00:59,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 15:01:01,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-20 15:01:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:01:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 15:01:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 48600 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-03-20 15:01:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 7992 refuted. 0 times theorem prover too weak. 41188 trivial. 0 not checked. [2022-03-20 15:01:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182960067] [2022-03-20 15:01:04,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525646894] [2022-03-20 15:01:04,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525646894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:04,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:04,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2022-03-20 15:01:04,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:04,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249533714] [2022-03-20 15:01:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249533714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:04,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:04,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 15:01:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430512190] [2022-03-20 15:01:04,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:04,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 15:01:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 15:01:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:01:04,046 INFO L87 Difference]: Start difference. First operand 5517 states and 6469 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-20 15:01:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:01:07,150 INFO L93 Difference]: Finished difference Result 5646 states and 6630 transitions. [2022-03-20 15:01:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 15:01:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) Word has length 935 [2022-03-20 15:01:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:01:07,161 INFO L225 Difference]: With dead ends: 5646 [2022-03-20 15:01:07,161 INFO L226 Difference]: Without dead ends: 5637 [2022-03-20 15:01:07,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1816 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3875, Invalid=6427, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 15:01:07,163 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 182 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:01:07,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 708 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:01:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2022-03-20 15:01:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2022-03-20 15:01:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 3645 states have (on average 1.0938271604938272) internal successors, (3987), 3782 states have internal predecessors, (3987), 1312 states have call successors, (1312), 678 states have call predecessors, (1312), 677 states have return successors, (1309), 1174 states have call predecessors, (1309), 1309 states have call successors, (1309) [2022-03-20 15:01:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 6608 transitions. [2022-03-20 15:01:08,722 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 6608 transitions. Word has length 935 [2022-03-20 15:01:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:01:08,723 INFO L478 AbstractCegarLoop]: Abstraction has 5635 states and 6608 transitions. [2022-03-20 15:01:08,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-20 15:01:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 6608 transitions. [2022-03-20 15:01:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-03-20 15:01:08,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:01:08,774 INFO L499 BasicCegarLoop]: trace histogram [148, 147, 147, 50, 49, 49, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:01:08,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:08,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:08,984 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:01:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:01:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 97 times [2022-03-20 15:01:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1437551836] [2022-03-20 15:01:08,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:01:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 98 times [2022-03-20 15:01:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:01:08,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792430612] [2022-03-20 15:01:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:01:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:01:09,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:01:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732596067] [2022-03-20 15:01:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:01:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:01:09,001 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:01:09,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 15:01:09,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:01:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:01:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 15:01:09,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:01:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 50666 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-20 15:01:11,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:01:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 8330 refuted. 0 times theorem prover too weak. 42928 trivial. 0 not checked. [2022-03-20 15:01:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:01:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792430612] [2022-03-20 15:01:12,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:01:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732596067] [2022-03-20 15:01:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732596067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:01:12,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:01:12,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2022-03-20 15:01:12,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:01:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1437551836] [2022-03-20 15:01:12,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1437551836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:01:12,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:01:12,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 15:01:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219151631] [2022-03-20 15:01:12,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:01:12,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 15:01:12,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 15:01:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 15:01:12,804 INFO L87 Difference]: Start difference. First operand 5635 states and 6608 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-20 15:01:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:01:16,228 INFO L93 Difference]: Finished difference Result 5764 states and 6769 transitions. [2022-03-20 15:01:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 15:01:16,229 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) Word has length 954 [2022-03-20 15:01:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:01:16,291 INFO L225 Difference]: With dead ends: 5764 [2022-03-20 15:01:16,291 INFO L226 Difference]: Without dead ends: 5755 [2022-03-20 15:01:16,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1855 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 15:01:16,293 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 165 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:01:16,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 720 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:01:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-03-20 15:01:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5753. [2022-03-20 15:01:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 3721 states have (on average 1.0937919914001613) internal successors, (4070), 3861 states have internal predecessors, (4070), 1340 states have call successors, (1340), 692 states have call predecessors, (1340), 691 states have return successors, (1337), 1199 states have call predecessors, (1337), 1337 states have call successors, (1337) [2022-03-20 15:01:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 6747 transitions. [2022-03-20 15:01:17,934 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 6747 transitions. Word has length 954 [2022-03-20 15:01:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:01:17,935 INFO L478 AbstractCegarLoop]: Abstraction has 5753 states and 6747 transitions. [2022-03-20 15:01:17,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-20 15:01:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 6747 transitions. [2022-03-20 15:01:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2022-03-20 15:01:17,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:01:17,948 INFO L499 BasicCegarLoop]: trace histogram [151, 150, 150, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:01:17,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:18,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:18,167 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:01:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:01:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 99 times [2022-03-20 15:01:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:01:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027390976] [2022-03-20 15:01:18,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:01:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 100 times [2022-03-20 15:01:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:01:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791872745] [2022-03-20 15:01:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:01:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:01:18,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:01:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587568974] [2022-03-20 15:01:18,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:01:18,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:18,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:01:18,183 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:01:18,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 15:01:18,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:01:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 15:01:18,504 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 15:01:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 15:01:19,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 15:01:19,040 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 15:01:19,040 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 15:01:19,046 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 15:01:19,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 15:01:19,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:01:19,257 INFO L719 BasicCegarLoop]: Path program histogram: [100, 36, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 15:01:19,260 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 15:01:19,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:01:19 BoogieIcfgContainer [2022-03-20 15:01:19,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 15:01:19,358 INFO L158 Benchmark]: Toolchain (without parser) took 462390.00ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 174.5MB in the beginning and 809.8MB in the end (delta: -635.3MB). Peak memory consumption was 392.6MB. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 229.6MB. Free memory is still 190.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.87ms. Allocated memory is still 229.6MB. Free memory was 174.2MB in the beginning and 200.8MB in the end (delta: -26.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 INFO L158 Benchmark]: Boogie Preprocessor took 36.89ms. Allocated memory is still 229.6MB. Free memory was 200.8MB in the beginning and 199.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 INFO L158 Benchmark]: RCFGBuilder took 215.35ms. Allocated memory is still 229.6MB. Free memory was 199.2MB in the beginning and 188.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 INFO L158 Benchmark]: TraceAbstraction took 461870.44ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 187.7MB in the beginning and 809.8MB in the end (delta: -622.1MB). Peak memory consumption was 407.6MB. Max. memory is 8.0GB. [2022-03-20 15:01:19,358 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 229.6MB. Free memory is still 190.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 262.87ms. Allocated memory is still 229.6MB. Free memory was 174.2MB in the beginning and 200.8MB in the end (delta: -26.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.89ms. Allocated memory is still 229.6MB. Free memory was 200.8MB in the beginning and 199.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 215.35ms. Allocated memory is still 229.6MB. Free memory was 199.2MB in the beginning and 188.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 461870.44ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 187.7MB in the beginning and 809.8MB in the end (delta: -622.1MB). Peak memory consumption was 407.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<50) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 461.7s, OverallIterations: 82, TraceHistogramMax: 151, PathProgramHistogramMax: 100, EmptinessCheckTime: 0.5s, AutomataDifference: 94.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 5299 SdHoareTripleChecker+Valid, 37.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5107 mSDsluCounter, 29519 SdHoareTripleChecker+Invalid, 34.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22782 mSDsCounter, 1669 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26238 IncrementalHoareTripleChecker+Invalid, 27910 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1669 mSolverCounterUnsat, 6737 mSDtfsCounter, 26238 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54371 GetRequests, 50680 SyntacticMatches, 73 SemanticMatches, 3618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23753 ImplicationChecksByTransitivity, 86.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5753occurred in iteration=81, InterpolantAutomatonStates: 2935, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 39.9s AutomataMinimizationTime, 81 MinimizatonAttempts, 632 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 15:01:19,394 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...